Hello, On Mon, 22 Feb 2021 10:44:19 +0100 Peter Otten <__peter__@web.de> wrote:
On 21/02/2021 23:06, Terry Reedy wrote:
On 2/21/2021 12:04 PM, Paul Sokolovsky wrote:
Traceback (most recent call last): File "pseudoc_tool.py", line 91, in <module> first_class_function_value(func, **pass_params) TypeError: print() got an unexpected keyword argument 'noann'
This is not typical behavior in current Python (3.8+).
The way I understand it's not about print(), it's about disambiguating multiple functions with the same name. Example:
PS > type .\ambiguous_names.py import random
def do_stuff(): pass
f = do_stuff
def do_stuff(a, b): pass
g = do_stuff
random.choice([f, g])(42)
Thanks, that's exactly what I meant, and a repro with random "roulette" is also what I had in mind, I just didn't get to it yet ;-).
PS > py .\ambiguous_names.py Traceback (most recent call last): File "...\ambiguous_names.py", line 13, in <module> random.choice([f, g])(42) TypeError: do_stuff() missing 1 required positional argument: 'b'
The traceback gives no clue which of the two do_stuff() functions caused the error, you have to check both implementations.
If that is a comman problem one might consider including module name and co_firstlineno in the message, or at least adding the relevant do_stuff() function to the exception's args.
As my original message argues, that's a workaround. Python tracebacks already have places where they show source file and line number - namely, the individual traceback entries. So, instead of cramming that info into the exception message, there should be additional last (latest in the order of execution) traceback entry, pointing to the exact function which had parameter mismatch. As I mentioned, I implemented that in my Python dialect, which happened to have exactly the same problem (code is not based on CPython). It looks like: Traceback (most recent call last): File "pseudoc_tool.py", line 91, in <module> File ".../xforms.py", line 25, in print TypeError: unexpected keyword argument 'noann' - that makes clear that it's "print" function of "xforms.py" module, line 25, which got an unexpected keyword argument. -- Best regards, Paul mailto:pmiscml@gmail.com