Issue 17071: Signature.bind() fails with a keyword argument named "self" (original) (raw)

Created on 2013-01-29 13:10 by pitrou, last changed 2022-04-11 14:57 by admin. This issue is now closed.

Messages (8)
msg180906 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2013-01-29 13:10
>>> def f(a, self): pass ... >>> sig = inspect.signature(f) >>> sig.bind(1, 2) <inspect.BoundArguments object at 0x7f607ead1e28> >>> sig.bind(a=1, self=2) Traceback (most recent call last): File "", line 1, in TypeError: bind() got multiple values for argument 'self'
msg180909 - (view)	Author: Yury Selivanov (yselivanov) *	Date: 2013-01-29 15:08
I'll take a look later today.
msg180926 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2013-01-29 18:43
Here is a patch.
msg180937 - (view)	Author: Yury Selivanov (yselivanov) *	Date: 2013-01-29 19:28
Thanks Antoine, the patch looks good to me. The only thing I would have done differently myself is to name "self" as "__bind_self__" (with two underscores at the end). Could you please apply the patch?
msg180943 - (view)	Author: Roundup Robot (python-dev)	Date: 2013-01-29 20:24
New changeset 49fd1c8aeca5 by Antoine Pitrou in branch '3.3': Issue #17071: Signature.bind() now works when one of the keyword arguments is named ``self``. http://hg.python.org/cpython/rev/49fd1c8aeca5 New changeset 4ff1dc8c0a3c by Antoine Pitrou in branch 'default': Issue #17071: Signature.bind() now works when one of the keyword arguments is named self. http://hg.python.org/cpython/rev/4ff1dc8c0a3c
msg180944 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2013-01-29 20:26
Committed to 3.3 and default!
msg180951 - (view)	Author: STINNER Victor (vstinner) *	Date: 2013-01-29 21:38
self doesn't need to have a name, you can use: def bind(*args, **kw): self = args[0] args = args[1:] To accept any name ;-)
msg180952 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2013-01-29 21:40
Indeed, there were several solutions to this.