Misleading reported number of given arguments on function call TypeError

[gsakkis]

BPO	8174
Nosy	@ezio-melotti

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2010-03-19.02:41:09.344>
created_at = <Date 2010-03-19.01:57:34.866>
labels = ['interpreter-core', 'type-bug']
title = 'Misleading reported number of given arguments on function call TypeError'
updated_at = <Date 2010-03-19.05:09:30.723>
user = 'https://bugs.python.org/gsakkis'

bugs.python.org fields:

activity = <Date 2010-03-19.05:09:30.723>
actor = 'Alexander.Belopolsky'
assignee = 'none'
closed = True
closed_date = <Date 2010-03-19.02:41:09.344>
closer = 'ezio.melotti'
components = ['Interpreter Core']
creation = <Date 2010-03-19.01:57:34.866>
creator = 'gsakkis'
dependencies = []
files = []
hgrepos = []
issue_num = 8174
keywords = []
message_count = 2.0
messages = ['101298', '101299']
nosy_count = 3.0
nosy_names = ['gsakkis', 'ezio.melotti', 'Alexander.Belopolsky']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue8174'
versions = ['Python 2.7']

[gsakkis]

The following exception message seems misleading, or at least not obvious:

>>> def f(a,b,c): pass
... 
>>> f(c=0,a=0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: f() takes exactly 3 non-keyword arguments (1 given)

Why "1 given" ? One could argue for either 0 or 2 given arguments but I fail to see how 1 is a reasonable answer.

[ezio-melotti]

Duplicate of bpo-6474.