[New-bugs-announce] [issue12510] IDLE get_the_calltip mishandles raw strings

[Roy Fox]

New submission from Roy Fox <roy.d.fox at gmail.com>:

Hi,

When you type (not copy-paste!) into an IDLE shell a string literal followed by (
you get a calltip.

When the string contains a bad unicode escaping you get an error (see example below), which makes some sense.

But when the string is raw, it isn't treated as such, and you may get the same error, though now it doesn't make any sense.

Non-raw example:

>>> '\xyz'(

>>> *** Internal Error: rpc.py:SocketIO.localcall()

 Object: exec 
 Method: <bound method Executive.get_the_calltip of <idlelib.run.Executive object at 0x021C2910>> 
 Args: ("'\\xyz'",)

Traceback (most recent call last):
  File "C:\Python32\lib\idlelib\rpc.py", line 188, in localcall
    ret = method(*args, **kwargs)
  File "C:\Python32\lib\idlelib\run.py", line 324, in get_the_calltip
    return self.calltip.fetch_tip(name)
  File "C:\Python32\lib\idlelib\CallTips.py", line 103, in fetch_tip
    entity = self.get_entity(name)
  File "C:\Python32\lib\idlelib\CallTips.py", line 112, in get_entity
    return eval(name, namespace)
  File "<string>", line 1
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 0-2: truncated \xXX escape


Raw example:

>>> r'\xyz'(

>>> *** Internal Error: rpc.py:SocketIO.localcall()

 Object: exec 
 Method: <bound method Executive.get_the_calltip of <idlelib.run.Executive object at 0x021C2910>> 
 Args: ("'\\xyz'",)

Traceback (most recent call last):
  File "C:\Python32\lib\idlelib\rpc.py", line 188, in localcall
    ret = method(*args, **kwargs)
  File "C:\Python32\lib\idlelib\run.py", line 324, in get_the_calltip
    return self.calltip.fetch_tip(name)
  File "C:\Python32\lib\idlelib\CallTips.py", line 103, in fetch_tip
    entity = self.get_entity(name)
  File "C:\Python32\lib\idlelib\CallTips.py", line 112, in get_entity
    return eval(name, namespace)
  File "<string>", line 1
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 0-2: truncated \xXX escape

----------
components: IDLE
messages: 139961
nosy: Roy.Fox
priority: normal
severity: normal
status: open
title: IDLE get_the_calltip mishandles raw strings
type: behavior
versions: Python 3.2

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12510>
_______________________________________