Author: georg.brandl Date: Fri Jul 30 18:00:46 2010 New Revision: 83286 Log: Several enhancements to pdb and its test suite. * added basic test for basic commands * removed duplication of command docs, and moved them to their implementation * unified and useful display of exceptions * output messages and errors using overridable methods (also fixes #1503502) Modified: python/branches/py3k/Lib/pdb.py python/branches/py3k/Lib/test/test_doctest.py python/branches/py3k/Lib/test/test_pdb.py Modified: python/branches/py3k/Lib/pdb.py ============================================================================== --- python/branches/py3k/Lib/pdb.py (original) +++ python/branches/py3k/Lib/pdb.py Fri Jul 30 18:00:46 2010 @@ -62,176 +62,14 @@ Debugger commands ================= -h(elp) - Without argument, print the list of available commands. With - a command name as argument, print help about that command. - -w(here) - Print a stack trace, with the most recent frame at the bottom. - An arrow indicates the "current frame", which determines the - context of most commands. - -d(own) [count] - Move the current frame count (default one) levels down in the - stack trace (to a newer frame). - -u(p) [count] - Move the current frame count (default one) levels up in the - stack trace (to an older frame). - -b(reak) [ ([filename:]lineno | function) [, condition] ] - With a filename:lineno argument, set a break there. If - filename is omitted, use the current file. With a function - name, set a break at the first executable line of that - function. Without argument, list all breaks. Each breakpoint - is assigned a number to which all the other breakpoint - commands refer. - - The condition argument, if present, is a string which must - evaluate to true in order for the breakpoint to be honored. - -tbreak [ ([filename:]lineno | function) [, condition] ] - Temporary breakpoint, which is removed automatically when it - is first hit. The arguments are the same as for break. - -cl(ear) [bpnumber [bpnumber ...] ] - With a space separated list of breakpoint numbers, clear those - breakpoints. Without argument, clear all breaks (but first - ask confirmation). - -disable bpnumber [bpnumber ...] - Disable the breakpoints given as a space separated list of - breakpoint numbers. Disabling a breakpoint means it cannot - cause the program to stop execution, but unlike clearing a - breakpoint, it remains in the list of breakpoints and can be - (re-)enabled. - -enable bpnumber [bpnumber ...] - Enable the breakpoints specified. - -ignore bpnumber [count] - Set the ignore count for the given breakpoint number. If - count is omitted, the ignore count is set to 0. A breakpoint - becomes active when the ignore count is zero. When non-zero, - the count is decremented each time the breakpoint is reached - and the breakpoint is not disabled and any associated - condition evaluates to true. - -condition bpnumber [condition] - Set a new condition for the breakpoint, an expression which - must evaluate to true before the breakpoint is honored. If - condition is absent, any existing condition is removed; i.e., - the breakpoint is made unconditional. - -commands [bpnumber] - Specify a list of commands for the breakpoint. Type a line - containing just 'end' to terminate the commands. The commands - are executed when the breakpoint is hit. - - With no breakpoint number argument, refers to the last - breakpoint set. - -s(tep) - Execute the current line, stop at the first possible occasion - (either in a function that is called or in the current - function). - -n(ext) - Continue execution until the next line in the current function - is reached or it returns. - -unt(il) [lineno] - Without argument, continue execution until the line with a - number greater than the current one is reached. With a line - number, continue execution until a line with a number greater - or equal to that is reached. In both cases, also stop when - the current frame returns. - -j(ump) lineno - Set the next line that will be executed. Only available in - the bottom-most frame. This lets you jump back and execute - code again, or jump forward to skip code that you don't want - to run. - - It should be noted that not all jumps are allowed -- for - instance it is not possible to jump into the middle of a - for loop or out of a finally clause. - -r(eturn) - Continue execution until the current function returns. - -run [args...] - Restart the debugged python program. If a string is supplied - it is splitted with "shlex", and the result is used as the new - sys.argv. History, breakpoints, actions and debugger options - are preserved. "restart" is an alias for "run". - -c(ont(inue)) - Continue execution, only stop when a breakpoint is encountered. - -l(ist) [first [,last]] - List source code for the current file. - Without arguments, list 11 lines around the current line - or continue the previous listing. - With . as argument, list 11 lines around the current line. - With one argument, list 11 lines starting at that line. - With two arguments, list the given range; - if the second argument is less than the first, it is a count. - -a(rgs) - Print the argument list of the current function. - -p expression - Print the value of the expression. - -(!) statement - Execute the (one-line) statement in the context of the current - stack frame. The exclamation point can be omitted unless the - first word of the statement resembles a debugger command. To - assign to a global variable you must always prefix the command - with a 'global' command, e.g.: - (Pdb) global list_options; list_options = ['-l'] - (Pdb) - - -whatis arg - Print the type of the argument. - -alias [name [command]] - Creates an alias called 'name' that executes 'command'. The - command must *not* be enclosed in quotes. Replaceable - parameters can be indicated by %1, %2, and so on, while %* is - replaced by all the parameters. If no command is given, the - current alias for name is shown. If no name is given, all - aliases are listed. - - Aliases may be nested and can contain anything that can be - legally typed at the pdb prompt. Note! You *can* override - internal pdb commands with aliases! Those internal commands - are then hidden until the alias is removed. Aliasing is - recursively applied to the first word of the command line; all - other words in the line are left alone. - - As an example, here are two useful aliases (especially when - placed in the .pdbrc file): - - # Print instance variables (usage "pi classInst") - alias pi for k in %1.__dict__.keys(): print "%1.",k,"=",%1.__dict__[k] - # Print instance variables in self - alias ps pi self - -unalias name - Delete the specified alias. - -q(uit) - Quit from the debugger. The program being executed is aborted. """ +# NOTE: the actual command documentation is collected from docstrings of the +# commands and is appended to __doc__ after the class has been defined. import sys import linecache import cmd import bdb -from reprlib import Repr import os import re import pprint @@ -242,12 +80,6 @@ """Causes a debugger to be restarted for the debugged python program.""" pass -# Create a custom safe Repr instance and increase its maxstring. -# The default of 30 truncates error messages too easily. -_repr = Repr() -_repr.maxstring = 200 -_saferepr = _repr.repr - __all__ = ["run", "pm", "Pdb", "runeval", "runctx", "runcall", "set_trace", "post_mortem", "help"] @@ -374,7 +206,7 @@ if self._wait_for_mainpyfile: return if self.stop_here(frame): - print('--Call--', file=self.stdout) + self.message('--Call--') self.interaction(frame, None) def user_line(self, frame): @@ -416,7 +248,7 @@ if self._wait_for_mainpyfile: return frame.f_locals['__return__'] = return_value - print('--Return--', file=self.stdout) + self.message('--Return--') self.interaction(frame, None) def user_exception(self, frame, exc_info): @@ -426,8 +258,8 @@ return exc_type, exc_value, exc_traceback = exc_info frame.f_locals['__exception__'] = exc_type, exc_value - exc_type_name = exc_type.__name__ - print(exc_type_name + ':', _saferepr(exc_value), file=self.stdout) + self.message(traceback.format_exception_only(exc_type, + exc_value)[-1].strip()) self.interaction(frame, exc_traceback) # General interaction function @@ -448,7 +280,7 @@ """ # reproduce the behavior of the standard displayhook, not printing None if obj is not None: - print(repr(obj)) + self.message(repr(obj)) def default(self, line): if line[:1] == '!': line = line[1:] @@ -469,11 +301,8 @@ sys.stdin = save_stdin sys.displayhook = save_displayhook except: - t, v = sys.exc_info()[:2] - if type(t) == type(''): - exc_type_name = t - else: exc_type_name = t.__name__ - print('***', exc_type_name + ':', v, file=self.stdout) + exc_info = sys.exc_info()[:2] + self.error(traceback.format_exception_only(*exc_info)[-1].strip()) def precmd(self, line): """Handle alias expansion and ';;' separator.""" @@ -540,25 +369,62 @@ return 1 return + # interface abstraction functions + + def message(self, msg): + print(msg, file=self.stdout) + + def error(self, msg): + print('***', msg, file=self.stdout) + # Command definitions, called by cmdloop() # The argument is the remaining string on the command line # Return true to exit from the command loop - do_h = cmd.Cmd.do_help - def do_commands(self, arg): - """Defines a list of commands associated to a breakpoint. + """commands [bpnumber] + (com) ... + (com) end + (Pdb) + + Specify a list of commands for breakpoint number bpnumber. + The commands themselves are entered on the following lines. + Type a line containing just 'end' to terminate the commands. + The commands are executed when the breakpoint is hit. + + To remove all commands from a breakpoint, type commands and + follow it immediately with end; that is, give no commands. + + With no bpnumber argument, commands refers to the last + breakpoint set. - Those commands will be executed whenever the breakpoint causes - the program to stop execution.""" + You can use breakpoint commands to start your program up + again. Simply use the continue command, or step, or any other + command that resumes execution. + + Specifying any command resuming execution (currently continue, + step, next, return, jump, quit and their abbreviations) + terminates the command list (as if that command was + immediately followed by end). This is because any time you + resume execution (even with a simple next or step), you may + encounter another breakpoint -- which could have its own + command list, leading to ambiguities about which list to + execute. + + If you use the 'silent' command in the command list, the usual + message about stopping at a breakpoint is not printed. This + may be desirable for breakpoints that are to print a specific + message and then continue. If none of the other commands + print anything, you will see no sign that the breakpoint was + reached. + """ if not arg: bnum = len(bdb.Breakpoint.bpbynumber) - 1 else: try: bnum = int(arg) except: - print("Usage: commands [bnum]\n ...\n end", - file=self.stdout) + self.error("Usage: commands [bnum]\n ...\n end") return self.commands_bnum = bnum self.commands[bnum] = [] @@ -574,13 +440,26 @@ self.prompt = prompt_back def do_break(self, arg, temporary = 0): - # break [ ([filename:]lineno | function) [, "condition"] ] + """b(reak) [ ([filename:]lineno | function) [, condition] ] + Without argument, list all breaks. + + With a line number argument, set a break at this line in the + current file. With a function name, set a break at the first + executable line of that function. If a second argument is + present, it is a string specifying an expression which must + evaluate to true before the breakpoint is honored. + + The line number may be prefixed with a filename and a colon, + to specify a breakpoint in another file (probably one that + hasn't been loaded yet). The file is searched for on + sys.path; the .py suffix may be omitted. + """ if not arg: if self.breaks: # There's at least one - print("Num Type Disp Enb Where", file=self.stdout) + self.message("Num Type Disp Enb Where") for bp in bdb.Breakpoint.bpbynumber: if bp: - bp.bpprint(self.stdout) + self.message(bp.bpformat()) return # parse arguments; comma has lowest precedence # and cannot occur in filename @@ -599,8 +478,7 @@ filename = arg[:colon].rstrip() f = self.lookupmodule(filename) if not f: - print('*** ', repr(filename), end=' ', file=self.stdout) - print('not found from sys.path', file=self.stdout) + self.error('%r not found from sys.path' % filename) return else: filename = f @@ -608,7 +486,7 @@ try: lineno = int(arg) except ValueError as msg: - print('*** Bad lineno:', arg, file=self.stdout) + self.error('Bad lineno: %s' % arg) return else: # no colon; can be lineno or function @@ -634,9 +512,8 @@ # last thing to try (ok, filename, ln) = self.lineinfo(arg) if not ok: - print('*** The specified object %r is not a function ' - 'or was not found along sys.path.' % arg, - file=self.stdout) + self.error('The specified object %r is not a function ' + 'or was not found along sys.path.' % arg) return funcname = ok # ok contains a function name lineno = int(ln) @@ -647,12 +524,12 @@ if line: # now set the break point err = self.set_break(filename, line, temporary, cond, funcname) - if err: print('***', err, file=self.stdout) + if err: + self.error(err, file=self.stdout) else: bp = self.get_breaks(filename, line)[-1] - print("Breakpoint %d at %s:%d" % (bp.number, - bp.file, - bp.line), file=self.stdout) + self.message("Breakpoint %d at %s:%d" % + (bp.number, bp.file, bp.line)) # To be overridden in derived debuggers def defaultFile(self): @@ -665,6 +542,10 @@ do_b = do_break def do_tbreak(self, arg): + """tbreak [ ([filename:]lineno | function) [, condition] ] + Same arguments as break, but sets a temporary breakpoint: it + is automatically deleted when first hit. + """ self.do_break(arg, 1) def lineinfo(self, identifier): @@ -711,40 +592,56 @@ globs = self.curframe.f_globals if hasattr(self, 'curframe') else None line = linecache.getline(filename, lineno, globs) if not line: - print('End of file', file=self.stdout) + self.message('End of file') return 0 line = line.strip() # Don't allow setting breakpoint at a blank line if (not line or (line[0] == '#') or (line[:3] == '"""') or line[:3] == "'''"): - print('*** Blank or comment', file=self.stdout) + self.error('Blank or comment') return 0 return lineno def do_enable(self, arg): + """enable bpnumber [bpnumber ...] + Enables the breakpoints given as a space separated list of + breakpoint numbers. + """ args = arg.split() for i in args: try: bp = self.get_bpbynumber(i) except ValueError as err: - print('***', err, file=self.stdout) + self.error(err) else: bp.enable() - print('Enabled %s' % bp, file=self.stdout) + self.message('Enabled %s' % bp) def do_disable(self, arg): + """disable bpnumber [bpnumber ...] + Disables the breakpoints given as a space separated list of + breakpoint numbers. Disabling a breakpoint means it cannot + cause the program to stop execution, but unlike clearing a + breakpoint, it remains in the list of breakpoints and can be + (re-)enabled. + """ args = arg.split() for i in args: try: bp = self.get_bpbynumber(i) except ValueError as err: - print('***', err, file=self.stdout) + self.error(err) else: bp.disable() - print('Disabled %s' % bp, file=self.stdout) + self.message('Disabled %s' % bp) def do_condition(self, arg): - # arg is breakpoint number and condition + """condition bpnumber [condition] + Set a new condition for the breakpoint, an expression which + must evaluate to true before the breakpoint is honored. If + condition is absent, any existing condition is removed; i.e., + the breakpoint is made unconditional. + """ args = arg.split(' ', 1) try: cond = args[1] @@ -753,18 +650,23 @@ try: bp = self.get_bpbynumber(args[0].strip()) except ValueError as err: - print('***', err, file=self.stdout) + self.error(err) else: bp.cond = cond if not cond: - print('Breakpoint %d is now unconditional.' % bp.number, - file=self.stdout) + self.message('Breakpoint %d is now unconditional.' % bp.number) else: - print('New condition set for breakpoint %d.' % bp.number, - file=self.stdout) + self.message('New condition set for breakpoint %d.' % bp.number) def do_ignore(self, arg): - """arg is bp number followed by ignore count.""" + """ignore bpnumber [count] + Set the ignore count for the given breakpoint number. If + count is omitted, the ignore count is set to 0. A breakpoint + becomes active when the ignore count is zero. When non-zero, + the count is decremented each time the breakpoint is reached + and the breakpoint is not disabled and any associated + condition evaluates to true. + """ args = arg.split() try: count = int(args[1].strip()) @@ -773,25 +675,27 @@ try: bp = self.get_bpbynumber(args[0].strip()) except ValueError as err: - print('***', err, file=self.stdout) + self.error(err) else: bp.ignore = count if count > 0: - reply = 'Will ignore next ' if count > 1: - reply = reply + '%d crossings' % count + countstr = '%d crossings' % count else: - reply = reply + '1 crossing' - print(reply + ' of breakpoint %d.' % bp.number, file=self.stdout) + countstr = '1 crossing' + self.message('Will ignore next %s of breakpoint %d.' % + (countstr, bp.number)) else: - print('Will stop next time breakpoint %d is reached.' - % bp.number, file=self.stdout) + self.message('Will stop next time breakpoint %d is reached.' + % bp.number) def do_clear(self, arg): - """Three possibilities, tried in this order: - clear -> clear all breaks, ask for confirmation - clear file:lineno -> clear all breaks at file:lineno - clear bpno bpno ... -> clear breakpoints by number""" + """cl(ear) filename:lineno\ncl(ear) [bpnumber [bpnumber...]] + With a space separated list of breakpoint numbers, clear + those breakpoints. Without argument, clear all breaks (but + first ask confirmation). With a filename:lineno argument, + clear all breaks at that line in that file. + """ if not arg: try: reply = input('Clear all breaks? ') @@ -802,7 +706,7 @@ bplist = [bp for bp in bdb.Breakpoint.bpbynumber if bp] self.clear_all_breaks() for bp in bplist: - print('Deleted %s' % bp, file=self.stdout) + self.message('Deleted %s' % bp) return if ':' in arg: # Make sure it works for "clear C:\foo\bar.py:12" @@ -817,23 +721,28 @@ bplist = self.get_breaks(filename, lineno) err = self.clear_break(filename, lineno) if err: - print('***', err, file=self.stdout) + self.error(err) else: for bp in bplist: - print('Deleted %s' % bp, file=self.stdout) + self.message('Deleted %s' % bp) return numberlist = arg.split() for i in numberlist: try: bp = self.get_bpbynumber(i) except ValueError as err: - print('***', err, file=self.stdout) + self.error(err) else: self.clear_break(bp.file, bp.line) - print('Deleted %s' % bp, file=self.stdout) + self.message('Deleted %s' % bp) do_cl = do_clear # 'c' is already an abbreviation for 'continue' def do_where(self, arg): + """w(here) + Print a stack trace, with the most recent frame at the bottom. + An arrow indicates the "current frame", which determines the + context of most commands. 'bt' is an alias for this command. + """ self.print_stack_trace() do_w = do_where do_bt = do_where @@ -847,13 +756,17 @@ self.lineno = None def do_up(self, arg): + """u(p) [count] + Move the current frame count (default one) levels up in the + stack trace (to an older frame). + """ if self.curindex == 0: - print('*** Oldest frame', file=self.stdout) + self.error('Oldest frame') return try: count = int(arg or 1) except ValueError: - print('*** Invalid frame count (%s)' % arg, file=self.stdout) + self.error('Invalid frame count (%s)' % arg) return if count < 0: newframe = 0 @@ -863,13 +776,17 @@ do_u = do_up def do_down(self, arg): + """d(own) [count] + Move the current frame count (default one) levels down in the + stack trace (to a newer frame). + """ if self.curindex + 1 == len(self.stack): - print('*** Newest frame', file=self.stdout) + self.error('Newest frame') return try: count = int(arg or 1) except ValueError: - print('*** Invalid frame count (%s)' % arg, file=self.stdout) + self.error('Invalid frame count (%s)' % arg) return if count < 0: newframe = len(self.stack) - 1 @@ -879,15 +796,22 @@ do_d = do_down def do_until(self, arg): + """unt(il) [lineno] + Without argument, continue execution until the line with a + number greater than the current one is reached. With a line + number, continue execution until a line with a number greater + or equal to that is reached. In both cases, also stop when + the current frame returns. + """ if arg: try: lineno = int(arg) except ValueError: - print('*** Error in argument:', repr(arg), file=self.stdout) + self.error('Error in argument: %r' % arg) return if lineno <= self.curframe.f_lineno: - print('*** "until" line number is smaller than current ' - 'line number', file=self.stdout) + self.error('"until" line number is smaller than current ' + 'line number') return else: lineno = None @@ -896,45 +820,75 @@ do_unt = do_until def do_step(self, arg): + """s(tep) + Execute the current line, stop at the first possible occasion + (either in a function that is called or in the current + function). + """ self.set_step() return 1 do_s = do_step def do_next(self, arg): + """n(ext) + Continue execution until the next line in the current function + is reached or it returns. + """ self.set_next(self.curframe) return 1 do_n = do_next def do_run(self, arg): - """Restart program by raising an exception to be caught in the main - debugger loop. If arguments were given, set them in sys.argv.""" + """run [args...] + Restart the debugged python program. If a string is supplied + it is splitted with "shlex", and the result is used as the new + sys.argv. History, breakpoints, actions and debugger options + are preserved. "restart" is an alias for "run". + """ if arg: import shlex argv0 = sys.argv[0:1] sys.argv = shlex.split(arg) sys.argv[:0] = argv0 + # this is caught in the main debugger loop raise Restart do_restart = do_run def do_return(self, arg): + """r(eturn) + Continue execution until the current function returns. + """ self.set_return(self.curframe) return 1 do_r = do_return def do_continue(self, arg): + """c(ont(inue)) + Continue execution, only stop when a breakpoint is encountered. + """ self.set_continue() return 1 do_c = do_cont = do_continue def do_jump(self, arg): + """j(ump) lineno + Set the next line that will be executed. Only available in + the bottom-most frame. This lets you jump back and execute + code again, or jump forward to skip code that you don't want + to run. + + It should be noted that not all jumps are allowed -- for + instance it is not possible to jump into the middle of a + for loop or out of a finally clause. + """ if self.curindex + 1 != len(self.stack): - print("*** You can only jump within the bottom frame", file=self.stdout) + self.error('You can only jump within the bottom frame') return try: arg = int(arg) except ValueError: - print("*** The 'jump' command requires a line number.", file=self.stdout) + self.error("The 'jump' command requires a line number") else: try: # Do the jump, fix up our copy of the stack, and display the @@ -943,22 +897,30 @@ self.stack[self.curindex] = self.stack[self.curindex][0], arg self.print_stack_entry(self.stack[self.curindex]) except ValueError as e: - print('*** Jump failed:', e, file=self.stdout) + self.error('Jump failed: %s' % e) do_j = do_jump def do_debug(self, arg): + """debug code + Enter a recursive debugger that steps through the code + argument (which is an arbitrary expression or statement to be + executed in the current environment). + """ sys.settrace(None) globals = self.curframe.f_globals locals = self.curframe_locals p = Pdb(self.completekey, self.stdin, self.stdout) p.prompt = "(%s) " % self.prompt.strip() - print("ENTERING RECURSIVE DEBUGGER", file=self.stdout) + self.message("ENTERING RECURSIVE DEBUGGER") sys.call_tracing(p.run, (arg, globals, locals)) - print("LEAVING RECURSIVE DEBUGGER", file=self.stdout) + self.message("LEAVING RECURSIVE DEBUGGER") sys.settrace(self.trace_dispatch) self.lastcmd = p.lastcmd def do_quit(self, arg): + """q(uit)\nexit + Quit from the debugger. The program being executed is aborted. + """ self._user_requested_quit = 1 self.set_quit() return 1 @@ -967,12 +929,18 @@ do_exit = do_quit def do_EOF(self, arg): - print(file=self.stdout) + """EOF + Handles the receipt of EOF as a command. + """ + self.message('') self._user_requested_quit = 1 self.set_quit() return 1 def do_args(self, arg): + """a(rgs) + Print the argument list of the current function. + """ co = self.curframe.f_code dict = self.curframe_locals n = co.co_argcount @@ -980,60 +948,76 @@ if co.co_flags & 8: n = n+1 for i in range(n): name = co.co_varnames[i] - print(name, '=', end=' ', file=self.stdout) - if name in dict: print(dict[name], file=self.stdout) - else: print("*** undefined ***", file=self.stdout) + if name in dict: + self.message('%s = %r' % (name, dict[name])) + else: + self.message('%s = *** undefined ***' % (name,)) do_a = do_args def do_retval(self, arg): + """retval + Print the return value for the last return of a function. + """ if '__return__' in self.curframe_locals: - print(self.curframe_locals['__return__'], file=self.stdout) + self.message(repr(self.curframe_locals['__return__'])) else: - print('*** Not yet returned!', file=self.stdout) + self.error('Not yet returned!') do_rv = do_retval def _getval(self, arg): try: return eval(arg, self.curframe.f_globals, self.curframe_locals) except: - t, v = sys.exc_info()[:2] - if isinstance(t, str): - exc_type_name = t - else: exc_type_name = t.__name__ - print('***', exc_type_name + ':', repr(v), file=self.stdout) + exc_info = sys.exc_info()[:2] + self.error(traceback.format_exception_only(*exc_info)[-1].strip()) raise def do_p(self, arg): + """p(rint) expression + Print the value of the expression. + """ try: - print(repr(self._getval(arg)), file=self.stdout) + self.message(repr(self._getval(arg))) except: pass # make "print" an alias of "p" since print isn't a Python statement anymore do_print = do_p def do_pp(self, arg): + """pp expression + Pretty-print the value of the expression. + """ try: - pprint.pprint(self._getval(arg), self.stdout) + self.message(pprint.pformat(self._getval(arg))) except: pass def do_list(self, arg): + """l(ist) [first [,last] | .] + List source code for the current file. + Without arguments, list 11 lines around the current line + or continue the previous listing. + With . as argument, list 11 lines around the current line. + With one argument, list 11 lines starting at that line. + With two arguments, list the given range; + if the second argument is less than the first, it is a count. + """ self.lastcmd = 'list' last = None if arg and arg != '.': try: - x = eval(arg, {}, {}) - if type(x) == type(()): - first, last = x - first = int(first) - last = int(last) + if ',' in arg: + first, last = arg.split(',') + first = int(first.strip()) + last = int(last.strip()) if last < first: - # Assume it's a count + # assume it's a count last = first + last else: - first = max(1, int(x) - 5) - except: - print('*** Error in argument:', repr(arg), file=self.stdout) + first = int(arg.strip()) + first = max(1, first - 5) + except ValueError: + self.error('Error in argument: %r' % arg) return elif self.lineno is None or arg == '.': first = max(1, self.curframe.f_lineno - 5) @@ -1048,7 +1032,7 @@ line = linecache.getline(filename, lineno, self.curframe.f_globals) if not line: - print('[EOF]', file=self.stdout) + self.message('[EOF]') break else: s = repr(lineno).rjust(3) @@ -1057,58 +1041,90 @@ else: s = s + ' ' if lineno == self.curframe.f_lineno: s = s + '->' - print(s + '\t' + line, end='', file=self.stdout) + self.message(s + '\t' + line.rstrip()) self.lineno = lineno except KeyboardInterrupt: pass do_l = do_list def do_whatis(self, arg): + """whatis arg + Print the type of the argument. + """ try: - value = eval(arg, self.curframe.f_globals, - self.curframe_locals) + value = self._getval(arg) except: - t, v = sys.exc_info()[:2] - if type(t) == type(''): - exc_type_name = t - else: exc_type_name = t.__name__ - print('***', exc_type_name + ':', repr(v), file=self.stdout) + # _getval() already printed the error return code = None # Is it a function? - try: code = value.__code__ - except: pass + try: + code = value.__code__ + except Exception: + pass if code: - print('Function', code.co_name, file=self.stdout) + self.message('Function %s' % code.co_name) return # Is it an instance method? - try: code = value.__func__.__code__ - except: pass + try: + code = value.__func__.__code__ + except Exception: + pass if code: - print('Method', code.co_name, file=self.stdout) + self.message('Method %s' % code.co_name) + return + # Is it a class? + if value.__class__ is type: + self.message('Class %s.%s' % (value.__module__, value.__name__)) return # None of the above... - print(type(value), file=self.stdout) + self.message(type(value)) def do_alias(self, arg): + """alias [name [command [parameter parameter ...] ]] + Create an alias called 'name' that executes 'command'. The + command must *not* be enclosed in quotes. Replaceable + parameters can be indicated by %1, %2, and so on, while %* is + replaced by all the parameters. If no command is given, the + current alias for name is shown. If no name is given, all + aliases are listed. + + Aliases may be nested and can contain anything that can be + legally typed at the pdb prompt. Note! You *can* override + internal pdb commands with aliases! Those internal commands + are then hidden until the alias is removed. Aliasing is + recursively applied to the first word of the command line; all + other words in the line are left alone. + + As an example, here are two useful aliases (especially when + placed in the .pdbrc file): + + # Print instance variables (usage "pi classInst") + alias pi for k in %1.__dict__.keys(): print "%1.",k,"=",%1.__dict__[k] + # Print instance variables in self + alias ps pi self + """ args = arg.split() if len(args) == 0: keys = sorted(self.aliases.keys()) for alias in keys: - print("%s = %s" % (alias, self.aliases[alias]), file=self.stdout) + self.message("%s = %s" % (alias, self.aliases[alias])) return if args[0] in self.aliases and len(args) == 1: - print("%s = %s" % (args[0], self.aliases[args[0]]), file=self.stdout) + self.message("%s = %s" % (args[0], self.aliases[args[0]])) else: self.aliases[args[0]] = ' '.join(args[1:]) def do_unalias(self, arg): + """unalias name + Delete the specified alias. + """ args = arg.split() if len(args) == 0: return if args[0] in self.aliases: del self.aliases[args[0]] - #list of all the commands making the program resume execution. + # List of all the commands making the program resume execution. commands_resuming = ['do_continue', 'do_step', 'do_next', 'do_return', 'do_quit', 'do_jump'] @@ -1130,292 +1146,53 @@ def print_stack_entry(self, frame_lineno, prompt_prefix=line_prefix): frame, lineno = frame_lineno if frame is self.curframe: - print('>', end=' ', file=self.stdout) + prefix = '> ' else: - print(' ', end=' ', file=self.stdout) - print(self.format_stack_entry(frame_lineno, - prompt_prefix), file=self.stdout) - - - # Help methods (derived from docstring) - - def help_help(self): - self.help_h() - - def help_h(self): - print("""h(elp) -Without argument, print the list of available commands. -With a command name as argument, print help about that command -"help pdb" shows the full pdb documentation -"help exec" gives help on the ! command""", file=self.stdout) - - def help_where(self): - self.help_w() - - def help_w(self): - print("""w(here) -Print a stack trace, with the most recent frame at the bottom. -An arrow indicates the "current frame", which determines the -context of most commands. 'bt' is an alias for this command.""", file=self.stdout) - - help_bt = help_w - - def help_down(self): - self.help_d() - - def help_d(self): - print("""d(own) -Move the current frame one level down in the stack trace -(to a newer frame).""", file=self.stdout) - - def help_up(self): - self.help_u() - - def help_u(self): - print("""u(p) -Move the current frame one level up in the stack trace -(to an older frame).""", file=self.stdout) - - def help_break(self): - self.help_b() - - def help_b(self): - print("""b(reak) ([file:]lineno | function) [, condition] -With a line number argument, set a break there in the current -file. With a function name, set a break at first executable line -of that function. Without argument, list all breaks. If a second -argument is present, it is a string specifying an expression -which must evaluate to true before the breakpoint is honored. - -The line number may be prefixed with a filename and a colon, -to specify a breakpoint in another file (probably one that -hasn't been loaded yet). The file is searched for on sys.path; -the .py suffix may be omitted.""", file=self.stdout) - - def help_clear(self): - self.help_cl() - - def help_cl(self): - print("cl(ear) filename:lineno", file=self.stdout) - print("""cl(ear) [bpnumber [bpnumber...]] -With a space separated list of breakpoint numbers, clear -those breakpoints. Without argument, clear all breaks (but -first ask confirmation). With a filename:lineno argument, -clear all breaks at that line in that file.""", file=self.stdout) - - def help_tbreak(self): - print("""tbreak same arguments as break, but breakpoint is -removed when first hit.""", file=self.stdout) - - def help_enable(self): - print("""enable bpnumber [bpnumber ...] -Enables the breakpoints given as a space separated list of -bp numbers.""", file=self.stdout) - - def help_disable(self): - print("""disable bpnumber [bpnumber ...] -Disables the breakpoints given as a space separated list of -bp numbers.""", file=self.stdout) - - def help_ignore(self): - print("""ignore bpnumber count -Sets the ignore count for the given breakpoint number. A breakpoint -becomes active when the ignore count is zero. When non-zero, the -count is decremented each time the breakpoint is reached and the -breakpoint is not disabled and any associated condition evaluates -to true.""", file=self.stdout) - - def help_condition(self): - print("""condition bpnumber str_condition -str_condition is a string specifying an expression which -must evaluate to true before the breakpoint is honored. -If str_condition is absent, any existing condition is removed; -i.e., the breakpoint is made unconditional.""", file=self.stdout) - - def help_step(self): - self.help_s() - - def help_s(self): - print("""s(tep) -Execute the current line, stop at the first possible occasion -(either in a function that is called or in the current function).""", file=self.stdout) - - def help_until(self): - self.help_unt() - - def help_unt(self): - print("""unt(il) -Continue execution until the line with a number greater than the current -one is reached or until the current frame returns""") - - def help_next(self): - self.help_n() - - def help_n(self): - print("""n(ext) -Continue execution until the next line in the current function -is reached or it returns.""", file=self.stdout) - - def help_return(self): - self.help_r() - - def help_r(self): - print("""r(eturn) -Continue execution until the current function returns.""", file=self.stdout) - - def help_continue(self): - self.help_c() - - def help_cont(self): - self.help_c() - - def help_c(self): - print("""c(ont(inue)) -Continue execution, only stop when a breakpoint is encountered.""", file=self.stdout) - - def help_jump(self): - self.help_j() - - def help_j(self): - print("""j(ump) lineno -Set the next line that will be executed.""", file=self.stdout) - - def help_debug(self): - print("""debug code -Enter a recursive debugger that steps through the code argument -(which is an arbitrary expression or statement to be executed -in the current environment).""", file=self.stdout) - - def help_list(self): - self.help_l() - - def help_l(self): - print("""l(ist) [first [,last]] -List source code for the current file. -Without arguments, list 11 lines around the current line -or continue the previous listing. -With one argument, list 11 lines starting at that line. -With two arguments, list the given range; -if the second argument is less than the first, it is a count.""", file=self.stdout) - - def help_args(self): - self.help_a() - - def help_a(self): - print("""a(rgs) -Print the arguments of the current function.""", file=self.stdout) - - def help_p(self): - print("""p(rint) expression -Print the value of the expression.""", file=self.stdout) - - def help_pp(self): - print("""pp expression -Pretty-print the value of the expression.""", file=self.stdout) + prefix = ' ' + self.message(prefix + + self.format_stack_entry(frame_lineno, prompt_prefix)) + + # Provide help + + def do_help(self, arg): + """h(elp) + Without argument, print the list of available commands. + With a command name as argument, print help about that command. + "help pdb" shows the full pdb documentation. + "help exec" gives help on the ! command. + """ + if not arg: + return cmd.Cmd.do_help(self, arg) + try: + try: + topic = getattr(self, 'help_' + arg) + return topic() + except AttributeError: + command = getattr(self, 'do_' + arg) + except AttributeError: + self.error('No help for %r' % arg) + else: + self.message(command.__doc__.rstrip()) + + do_h = do_help def help_exec(self): - print("""(!) statement -Execute the (one-line) statement in the context of -the current stack frame. -The exclamation point can be omitted unless the first word -of the statement resembles a debugger command. -To assign to a global variable you must always prefix the -command with a 'global' command, e.g.: -(Pdb) global list_options; list_options = ['-l'] -(Pdb)""", file=self.stdout) - - def help_run(self): - print("""run [args...] -Restart the debugged python program. If a string is supplied, it is -splitted with "shlex" and the result is used as the new sys.argv. -History, breakpoints, actions and debugger options are preserved. -"restart" is an alias for "run".""") - - help_restart = help_run - - def help_quit(self): - self.help_q() - - def help_q(self): - print("""q(uit) or exit - Quit from the debugger. -The program being executed is aborted.""", file=self.stdout) - - help_exit = help_q - - def help_whatis(self): - print("""whatis arg -Prints the type of the argument.""", file=self.stdout) - - def help_EOF(self): - print("""EOF -Handles the receipt of EOF as a command.""", file=self.stdout) - - def help_alias(self): - print("""alias [name [command [parameter parameter ...] ]] -Creates an alias called 'name' the executes 'command'. The command -must *not* be enclosed in quotes. Replaceable parameters are -indicated by %1, %2, and so on, while %* is replaced by all the -parameters. If no command is given, the current alias for name -is shown. If no name is given, all aliases are listed. - -Aliases may be nested and can contain anything that can be -legally typed at the pdb prompt. Note! You *can* override -internal pdb commands with aliases! Those internal commands -are then hidden until the alias is removed. Aliasing is recursively -applied to the first word of the command line; all other words -in the line are left alone. - -Some useful aliases (especially when placed in the .pdbrc file) are: - -#Print instance variables (usage "pi classInst") -alias pi for k in %1.__dict__.keys(): print "%1.",k,"=",%1.__dict__[k] - -#Print instance variables in self -alias ps pi self -""", file=self.stdout) - - def help_unalias(self): - print("""unalias name -Deletes the specified alias.""", file=self.stdout) - - def help_commands(self): - print("""commands [bpnumber] -(com) ... -(com) end -(Pdb) - -Specify a list of commands for breakpoint number bpnumber. The -commands themselves appear on the following lines. Type a line -containing just 'end' to terminate the commands. - -To remove all commands from a breakpoint, type commands and -follow it immediately with end; that is, give no commands. - -With no bpnumber argument, commands refers to the last -breakpoint set. - -You can use breakpoint commands to start your program up again. -Simply use the continue command, or step, or any other -command that resumes execution. - -Specifying any command resuming execution (currently continue, -step, next, return, jump, quit and their abbreviations) terminates -the command list (as if that command was immediately followed by end). -This is because any time you resume execution -(even with a simple next or step), you may encounter -another breakpoint--which could have its own command list, leading to -ambiguities about which list to execute. - - If you use the 'silent' command in the command list, the -usual message about stopping at a breakpoint is not printed. This may -be desirable for breakpoints that are to print a specific message and -then continue. If none of the other commands print anything, you -see no sign that the breakpoint was reached. -""", file=self.stdout) + """(!) statement + Execute the (one-line) statement in the context of the current + stack frame. The exclamation point can be omitted unless the + first word of the statement resembles a debugger command. To + assign to a global variable you must always prefix the command + with a 'global' command, e.g.: + (Pdb) global list_options; list_options = ['-l'] + (Pdb) + """ + self.message(self.help_exec.__doc__.strip()) def help_pdb(self): help() + # other helper functions + def lookupmodule(self, filename): """Helper function for break/clear parsing -- may be overridden. @@ -1466,6 +1243,22 @@ (fp.read(), self.mainpyfile) self.run(statement) +# Collect all command help into docstring + +# unfortunately we can't guess this order from the class definition +_help_order = [ + 'help', 'where', 'down', 'up', 'break', 'tbreak', 'clear', 'disable', + 'enable', 'ignore', 'condition', 'commands', 'step', 'next', 'until', + 'jump', 'return', 'retval', 'run', 'continue', 'list', 'args', 'print', + 'whatis', 'alias', 'unalias', 'quit', +] + +for _command in _help_order: + __doc__ += getattr(Pdb, 'do_' + _command).__doc__.strip() + '\n\n' +__doc__ += Pdb.help_exec.__doc__ + +del _help_order, _command + # Simplified interface def run(statement, globals=None, locals=None): @@ -1492,9 +1285,9 @@ # sys.exc_info() returns (type, value, traceback) if an exception is # being handled, otherwise it returns None t = sys.exc_info()[2] - if t is None: - raise ValueError("A valid traceback must be passed if no " - "exception is being handled") + if t is None: + raise ValueError("A valid traceback must be passed if no " + "exception is being handled") p = Pdb() p.reset() Modified: python/branches/py3k/Lib/test/test_doctest.py ============================================================================== --- python/branches/py3k/Lib/test/test_doctest.py (original) +++ python/branches/py3k/Lib/test/test_doctest.py Fri Jul 30 18:00:46 2010 @@ -1898,7 +1898,7 @@ > <doctest foo[1]>(1)<module>() -> calls_set_trace() (Pdb) print(foo) - *** NameError: NameError("name 'foo' is not defined",) + *** NameError: name 'foo' is not defined (Pdb) continue TestResults(failed=0, attempted=2) """ Modified: python/branches/py3k/Lib/test/test_pdb.py ============================================================================== --- python/branches/py3k/Lib/test/test_pdb.py (original) +++ python/branches/py3k/Lib/test/test_pdb.py Fri Jul 30 18:00:46 2010 @@ -54,6 +54,209 @@ """ +def test_pdb_basic_commands(): + """Test the basic commands of pdb. + + >>> def test_function_2(foo, bar='default'): + ... print(foo) + ... for i in range(5): + ... print(i) + ... print(bar) + ... for i in range(10): + ... never_executed + ... print('after for') + ... print('...') + ... return foo.upper() + + >>> def test_function(): + ... import pdb; pdb.Pdb().set_trace() + ... ret = test_function_2('baz') + ... print(ret) + + >>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE + ... 'step', # entering the function call + ... 'args', # display function args + ... 'list', # list function source + ... 'bt', # display backtrace + ... 'up', # step up to test_function() + ... 'down', # step down to test_function_2() again + ... 'next', # stepping to print(foo) + ... 'next', # stepping to the for loop + ... 'step', # stepping into the for loop + ... 'until', # continuing until out of the for loop + ... 'next', # executing the print(bar) + ... 'jump 8', # jump over second for loop + ... 'return', # return out of function + ... 'retval', # display return value + ... 'continue', + ... ]): + ... test_function() + > <doctest test.test_pdb.test_pdb_basic_commands[1]>(3)test_function() + -> ret = test_function_2('baz') + (Pdb) step + --Call-- + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2() + -> def test_function_2(foo, bar='default'): + (Pdb) args + foo = 'baz' + bar = 'default' + (Pdb) list + 1 -> def test_function_2(foo, bar='default'): + 2 print(foo) + 3 for i in range(5): + 4 print(i) + 5 print(bar) + 6 for i in range(10): + 7 never_executed + 8 print('after for') + 9 print('...') + 10 return foo.upper() + [EOF] + (Pdb) bt + ... + <doctest test.test_pdb.test_pdb_basic_commands[2]>(18)<module>() + -> test_function() + <doctest test.test_pdb.test_pdb_basic_commands[1]>(3)test_function() + -> ret = test_function_2('baz') + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2() + -> def test_function_2(foo, bar='default'): + (Pdb) up + > <doctest test.test_pdb.test_pdb_basic_commands[1]>(3)test_function() + -> ret = test_function_2('baz') + (Pdb) down + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2() + -> def test_function_2(foo, bar='default'): + (Pdb) next + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(2)test_function_2() + -> print(foo) + (Pdb) next + baz + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(3)test_function_2() + -> for i in range(5): + (Pdb) step + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(4)test_function_2() + -> print(i) + (Pdb) until + 0 + 1 + 2 + 3 + 4 + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(5)test_function_2() + -> print(bar) + (Pdb) next + default + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(6)test_function_2() + -> for i in range(10): + (Pdb) jump 8 + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(8)test_function_2() + -> print('after for') + (Pdb) return + after for + ... + --Return-- + > <doctest test.test_pdb.test_pdb_basic_commands[0]>(10)test_function_2()->'BAZ' + -> return foo.upper() + (Pdb) retval + 'BAZ' + (Pdb) continue + BAZ + """ + + +def test_pdb_breakpoint_commands(): + """Test basic commands related to breakpoints. + + >>> def test_function(): + ... import pdb; pdb.Pdb().set_trace() + ... print(1) + ... print(2) + ... print(3) + ... print(4) + + First, need to clear bdb state that might be left over from previous tests. + Otherwise, the new breakpoints might get assigned different numbers. + + >>> from bdb import Breakpoint + >>> Breakpoint.next = 1 + >>> Breakpoint.bplist = {} + >>> Breakpoint.bpbynumber = [None] + + Now test the breakpoint commands. NORMALIZE_WHITESPACE is needed because + the breakpoint list outputs a tab for the "stop only" and "ignore next" + lines, which we don't want to put in here. + + >>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE + ... 'break 3', + ... 'disable 1', + ... 'ignore 1 10', + ... 'condition 1 1 < 2', + ... 'break 4', + ... 'break', + ... 'condition 1', + ... 'enable 1', + ... 'clear 1', + ... 'commands 2', + ... 'print 42', + ... 'end', + ... 'continue', # will stop at breakpoint 2 (line 4) + ... 'clear', # clear all! + ... 'y', + ... 'tbreak 5', + ... 'continue', # will stop at temporary breakpoint + ... 'break', # make sure breakpoint is gone + ... 'continue', + ... ]): + ... test_function() + > <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(3)test_function() + -> print(1) + (Pdb) break 3 + Breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3 + (Pdb) disable 1 + Disabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3 + (Pdb) ignore 1 10 + Will ignore next 10 crossings of breakpoint 1. + (Pdb) condition 1 1 < 2 + New condition set for breakpoint 1. + (Pdb) break 4 + Breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4 + (Pdb) break + Num Type Disp Enb Where + 1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3 + stop only if 1 < 2 + ignore next 10 hits + 2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4 + (Pdb) condition 1 + Breakpoint 1 is now unconditional. + (Pdb) enable 1 + Enabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3 + (Pdb) clear 1 + Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3 + (Pdb) commands 2 + (com) print 42 + (com) end + (Pdb) continue + 1 + 42 + > <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(4)test_function() + -> print(2) + (Pdb) clear + Clear all breaks? y + Deleted breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4 + (Pdb) tbreak 5 + Breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5 + (Pdb) continue + 2 + Deleted breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5 + > <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(5)test_function() + -> print(3) + (Pdb) break + (Pdb) continue + 3 + 4 + """ + + def test_pdb_skip_modules(): """This illustrates the simple case of module skipping. @@ -167,84 +370,6 @@ """ -def test_pdb_breakpoints(): - """Test handling of breakpoints. - - >>> def test_function(): - ... import pdb; pdb.Pdb().set_trace() - ... print(1) - ... print(2) - ... print(3) - ... print(4) - - First, need to clear bdb state that might be left over from previous tests. - Otherwise, the new breakpoints might get assigned different numbers. - - >>> from bdb import Breakpoint - >>> Breakpoint.next = 1 - >>> Breakpoint.bplist = {} - >>> Breakpoint.bpbynumber = [None] - - Now test the breakpoint commands. NORMALIZE_WHITESPACE is needed because - the breakpoint list outputs a tab for the "stop only" and "ignore next" - lines, which we don't want to put in here. - - >>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE - ... 'break 3', - ... 'disable 1', - ... 'ignore 1 10', - ... 'condition 1 1 < 2', - ... 'break 4', - ... 'break', - ... 'condition 1', - ... 'enable 1', - ... 'clear 1', - ... 'commands 2', - ... 'print 42', - ... 'end', - ... 'continue', # will stop at breakpoint 2 - ... 'continue', - ... ]): - ... test_function() - > <doctest test.test_pdb.test_pdb_breakpoints[0]>(3)test_function() - -> print(1) - (Pdb) break 3 - Breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoints[0]>:3 - (Pdb) disable 1 - Disabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoints[0]>:3 - (Pdb) ignore 1 10 - Will ignore next 10 crossings of breakpoint 1. - (Pdb) condition 1 1 < 2 - New condition set for breakpoint 1. - (Pdb) break 4 - Breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoints[0]>:4 - (Pdb) break - Num Type Disp Enb Where - 1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoints[0]>:3 - stop only if 1 < 2 - ignore next 10 hits - 2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoints[0]>:4 - (Pdb) condition 1 - Breakpoint 1 is now unconditional. - (Pdb) enable 1 - Enabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoints[0]>:3 - (Pdb) clear 1 - Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoints[0]>:3 - (Pdb) commands 2 - (com) print 42 - (com) end - (Pdb) continue - 1 - 42 - > <doctest test.test_pdb.test_pdb_breakpoints[0]>(4)test_function() - -> print(2) - (Pdb) continue - 2 - 3 - 4 - """ - - def pdb_invoke(method, arg): """Run pdb.method(arg).""" import pdb; getattr(pdb, method)(arg)