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PEP 448: additional unpacking generalizations (closes #2292)

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Patch by Neil Girdhar.
This commit is contained in:
Benjamin Peterson 2015-05-05 20:16:41 -04:00
parent 4ccc1514d0
commit 025e9ebd0a
26 changed files with 2664 additions and 2118 deletions
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22
Lib/test/test_extcall.py
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@ -34,17 +34,37 @@ Argument list examples
(1, 2, 3, 4, 5) {}
>>> f(1, 2, 3, *[4, 5])
(1, 2, 3, 4, 5) {}
>>> f(*[1, 2, 3], 4, 5)
(1, 2, 3, 4, 5) {}
>>> f(1, 2, 3, *UserList([4, 5]))
(1, 2, 3, 4, 5) {}
>>> f(1, 2, 3, *[4, 5], *[6, 7])
(1, 2, 3, 4, 5, 6, 7) {}
>>> f(1, *[2, 3], 4, *[5, 6], 7)
(1, 2, 3, 4, 5, 6, 7) {}
>>> f(*UserList([1, 2]), *UserList([3, 4]), 5, *UserList([6, 7]))
(1, 2, 3, 4, 5, 6, 7) {}
Here we add keyword arguments
>>> f(1, 2, 3, **{'a':4, 'b':5})
(1, 2, 3) {'a': 4, 'b': 5}
>>> f(1, 2, **{'a': -1, 'b': 5}, **{'a': 4, 'c': 6})
Traceback (most recent call last):
...
TypeError: f() got multiple values for keyword argument 'a'
>>> f(1, 2, **{'a': -1, 'b': 5}, a=4, c=6)
Traceback (most recent call last):
...
TypeError: f() got multiple values for keyword argument 'a'
>>> f(1, 2, 3, *[4, 5], **{'a':6, 'b':7})
(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
>>> f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b': 9})
(1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
>>> f(1, 2, 3, *[4, 5], **{'c': 8}, **{'a':6, 'b':7})
(1, 2, 3, 4, 5) {'a': 6, 'b': 7, 'c': 8}
>>> f(1, 2, 3, *(4, 5), x=6, y=7, **{'a':8, 'b': 9})
(1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}
>>> f(1, 2, 3, **UserDict(a=4, b=5))
(1, 2, 3) {'a': 4, 'b': 5}
@ -52,6 +72,8 @@ Here we add keyword arguments
(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
>>> f(1, 2, 3, x=4, y=5, *(6, 7), **UserDict(a=8, b=9))
(1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
>>> f(1, 2, 3, *(4, 5), x=6, y=7, **UserDict(a=8, b=9))
(1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}
Examples with invalid arguments (TypeErrors). We're also testing the function
names in the exception messages.