531 lines
14 KiB
Python
531 lines
14 KiB
Python
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"""Doctest for method/function calls.
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We're going the use these types for extra testing
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>>> from collections import UserList
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>>> from collections import UserDict
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We're defining four helper functions
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>>> def e(a,b):
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... print(a, b)
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>>> def f(*a, **k):
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... print(a, support.sortdict(k))
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>>> def g(x, *y, **z):
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... print(x, y, support.sortdict(z))
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>>> def h(j=1, a=2, h=3):
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... print(j, a, h)
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Argument list examples
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>>> f()
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() {}
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>>> f(1)
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(1,) {}
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>>> f(1, 2)
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(1, 2) {}
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>>> f(1, 2, 3)
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(1, 2, 3) {}
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>>> f(1, 2, 3, *(4, 5))
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(1, 2, 3, 4, 5) {}
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>>> f(1, 2, 3, *[4, 5])
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(1, 2, 3, 4, 5) {}
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>>> f(*[1, 2, 3], 4, 5)
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(1, 2, 3, 4, 5) {}
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>>> f(1, 2, 3, *UserList([4, 5]))
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(1, 2, 3, 4, 5) {}
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>>> f(1, 2, 3, *[4, 5], *[6, 7])
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(1, 2, 3, 4, 5, 6, 7) {}
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>>> f(1, *[2, 3], 4, *[5, 6], 7)
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(1, 2, 3, 4, 5, 6, 7) {}
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>>> f(*UserList([1, 2]), *UserList([3, 4]), 5, *UserList([6, 7]))
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(1, 2, 3, 4, 5, 6, 7) {}
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Here we add keyword arguments
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>>> f(1, 2, 3, **{'a':4, 'b':5})
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(1, 2, 3) {'a': 4, 'b': 5}
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>>> f(1, 2, **{'a': -1, 'b': 5}, **{'a': 4, 'c': 6})
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.f() got multiple values for keyword argument 'a'
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>>> f(1, 2, **{'a': -1, 'b': 5}, a=4, c=6)
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.f() got multiple values for keyword argument 'a'
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>>> f(1, 2, a=3, **{'a': 4}, **{'a': 5})
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.f() got multiple values for keyword argument 'a'
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>>> f(1, 2, 3, *[4, 5], **{'a':6, 'b':7})
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(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
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>>> f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b': 9})
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(1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
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>>> f(1, 2, 3, *[4, 5], **{'c': 8}, **{'a':6, 'b':7})
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(1, 2, 3, 4, 5) {'a': 6, 'b': 7, 'c': 8}
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>>> f(1, 2, 3, *(4, 5), x=6, y=7, **{'a':8, 'b': 9})
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(1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}
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>>> f(1, 2, 3, **UserDict(a=4, b=5))
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(1, 2, 3) {'a': 4, 'b': 5}
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>>> f(1, 2, 3, *(4, 5), **UserDict(a=6, b=7))
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(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
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>>> f(1, 2, 3, x=4, y=5, *(6, 7), **UserDict(a=8, b=9))
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(1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
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>>> f(1, 2, 3, *(4, 5), x=6, y=7, **UserDict(a=8, b=9))
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(1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}
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Mix keyword arguments and dict unpacking
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>>> d1 = {'a':1}
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>>> d2 = {'c':3}
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>>> f(b=2, **d1, **d2)
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() {'a': 1, 'b': 2, 'c': 3}
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>>> f(**d1, b=2, **d2)
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() {'a': 1, 'b': 2, 'c': 3}
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>>> f(**d1, **d2, b=2)
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() {'a': 1, 'b': 2, 'c': 3}
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>>> f(**d1, b=2, **d2, d=4)
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() {'a': 1, 'b': 2, 'c': 3, 'd': 4}
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Examples with invalid arguments (TypeErrors). We're also testing the function
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names in the exception messages.
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Verify clearing of SF bug #733667
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>>> e(c=4)
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Traceback (most recent call last):
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...
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TypeError: e() got an unexpected keyword argument 'c'
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>>> g()
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Traceback (most recent call last):
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...
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TypeError: g() missing 1 required positional argument: 'x'
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>>> g(*())
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Traceback (most recent call last):
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...
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TypeError: g() missing 1 required positional argument: 'x'
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>>> g(*(), **{})
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Traceback (most recent call last):
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...
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TypeError: g() missing 1 required positional argument: 'x'
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>>> g(1)
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1 () {}
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>>> g(1, 2)
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1 (2,) {}
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>>> g(1, 2, 3)
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1 (2, 3) {}
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>>> g(1, 2, 3, *(4, 5))
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1 (2, 3, 4, 5) {}
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>>> class Nothing: pass
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...
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>>> g(*Nothing())
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.g() argument after * must be an iterable, not Nothing
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>>> class Nothing:
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... def __len__(self): return 5
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...
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>>> g(*Nothing())
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.g() argument after * must be an iterable, not Nothing
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>>> class Nothing():
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... def __len__(self): return 5
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... def __getitem__(self, i):
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... if i<3: return i
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... else: raise IndexError(i)
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...
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>>> g(*Nothing())
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0 (1, 2) {}
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>>> class Nothing:
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... def __init__(self): self.c = 0
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... def __iter__(self): return self
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... def __next__(self):
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... if self.c == 4:
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... raise StopIteration
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... c = self.c
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... self.c += 1
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... return c
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...
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>>> g(*Nothing())
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0 (1, 2, 3) {}
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Check for issue #4806: Does a TypeError in a generator get propagated with the
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right error message? (Also check with other iterables.)
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>>> def broken(): raise TypeError("myerror")
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...
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>>> g(*(broken() for i in range(1)))
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> g(*range(1), *(broken() for i in range(1)))
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> class BrokenIterable1:
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... def __iter__(self):
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... raise TypeError('myerror')
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...
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>>> g(*BrokenIterable1())
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> g(*range(1), *BrokenIterable1())
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> class BrokenIterable2:
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... def __iter__(self):
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... yield 0
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... raise TypeError('myerror')
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...
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>>> g(*BrokenIterable2())
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> g(*range(1), *BrokenIterable2())
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> class BrokenSequence:
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... def __getitem__(self, idx):
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... raise TypeError('myerror')
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...
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>>> g(*BrokenSequence())
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Traceback (most recent call last):
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...
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TypeError: myerror
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>>> g(*range(1), *BrokenSequence())
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Traceback (most recent call last):
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...
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TypeError: myerror
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Make sure that the function doesn't stomp the dictionary
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>>> d = {'a': 1, 'b': 2, 'c': 3}
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>>> d2 = d.copy()
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>>> g(1, d=4, **d)
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1 () {'a': 1, 'b': 2, 'c': 3, 'd': 4}
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>>> d == d2
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True
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What about willful misconduct?
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>>> def saboteur(**kw):
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... kw['x'] = 'm'
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... return kw
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>>> d = {}
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>>> kw = saboteur(a=1, **d)
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>>> d
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{}
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>>> g(1, 2, 3, **{'x': 4, 'y': 5})
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Traceback (most recent call last):
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...
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TypeError: g() got multiple values for argument 'x'
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>>> f(**{1:2})
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Traceback (most recent call last):
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...
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TypeError: keywords must be strings
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>>> h(**{'e': 2})
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Traceback (most recent call last):
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...
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TypeError: h() got an unexpected keyword argument 'e'
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>>> h(*h)
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after * must be an iterable, not function
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>>> h(1, *h)
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Traceback (most recent call last):
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...
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TypeError: Value after * must be an iterable, not function
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>>> h(*[1], *h)
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Traceback (most recent call last):
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...
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TypeError: Value after * must be an iterable, not function
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>>> dir(*h)
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Traceback (most recent call last):
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...
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TypeError: dir() argument after * must be an iterable, not function
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>>> nothing = None
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>>> nothing(*h)
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Traceback (most recent call last):
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...
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TypeError: None argument after * must be an iterable, \
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not function
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>>> h(**h)
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after ** must be a mapping, not function
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>>> h(**[])
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after ** must be a mapping, not list
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>>> h(a=1, **h)
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after ** must be a mapping, not function
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>>> h(a=1, **[])
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after ** must be a mapping, not list
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>>> h(**{'a': 1}, **h)
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after ** must be a mapping, not function
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>>> h(**{'a': 1}, **[])
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.h() argument after ** must be a mapping, not list
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>>> dir(**h)
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Traceback (most recent call last):
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...
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TypeError: dir() argument after ** must be a mapping, not function
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>>> nothing(**h)
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Traceback (most recent call last):
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...
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TypeError: None argument after ** must be a mapping, \
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not function
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>>> dir(b=1, **{'b': 1})
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Traceback (most recent call last):
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...
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TypeError: dir() got multiple values for keyword argument 'b'
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Test a kwargs mapping with duplicated keys.
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>>> from collections.abc import Mapping
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>>> class MultiDict(Mapping):
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... def __init__(self, items):
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... self._items = items
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...
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... def __iter__(self):
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... return (k for k, v in self._items)
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...
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... def __getitem__(self, key):
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... for k, v in self._items:
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... if k == key:
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... return v
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... raise KeyError(key)
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...
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... def __len__(self):
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... return len(self._items)
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...
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... def keys(self):
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... return [k for k, v in self._items]
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...
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... def values(self):
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... return [v for k, v in self._items]
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...
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... def items(self):
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... return [(k, v) for k, v in self._items]
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...
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>>> g(**MultiDict([('x', 1), ('y', 2)]))
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1 () {'y': 2}
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>>> g(**MultiDict([('x', 1), ('x', 2)]))
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.g() got multiple values for keyword argument 'x'
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>>> g(a=3, **MultiDict([('x', 1), ('x', 2)]))
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Traceback (most recent call last):
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...
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TypeError: test.test_extcall.g() got multiple values for keyword argument 'x'
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>>> g(**MultiDict([('a', 3)]), **MultiDict([('x', 1), ('x', 2)]))
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: test.test_extcall.g() got multiple values for keyword argument 'x'
|
||
|
|
|
||
|
|
Another helper function
|
||
|
|
|
||
|
|
>>> def f2(*a, **b):
|
||
|
|
... return a, b
|
||
|
|
|
||
|
|
|
||
|
|
>>> d = {}
|
||
|
|
>>> for i in range(512):
|
||
|
|
... key = 'k%d' % i
|
||
|
|
... d[key] = i
|
||
|
|
>>> a, b = f2(1, *(2,3), **d)
|
||
|
|
>>> len(a), len(b), b == d
|
||
|
|
(3, 512, True)
|
||
|
|
|
||
|
|
>>> class Foo:
|
||
|
|
... def method(self, arg1, arg2):
|
||
|
|
... return arg1+arg2
|
||
|
|
|
||
|
|
>>> x = Foo()
|
||
|
|
>>> Foo.method(*(x, 1, 2))
|
||
|
|
3
|
||
|
|
>>> Foo.method(x, *(1, 2))
|
||
|
|
3
|
||
|
|
>>> Foo.method(*(1, 2, 3))
|
||
|
|
5
|
||
|
|
>>> Foo.method(1, *[2, 3])
|
||
|
|
5
|
||
|
|
|
||
|
|
A PyCFunction that takes only positional parameters should allow an
|
||
|
|
empty keyword dictionary to pass without a complaint, but raise a
|
||
|
|
TypeError if te dictionary is not empty
|
||
|
|
|
||
|
|
>>> try:
|
||
|
|
... silence = id(1, *{})
|
||
|
|
... True
|
||
|
|
... except:
|
||
|
|
... False
|
||
|
|
True
|
||
|
|
|
||
|
|
>>> id(1, **{'foo': 1})
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: id() takes no keyword arguments
|
||
|
|
|
||
|
|
A corner case of keyword dictionary items being deleted during
|
||
|
|
the function call setup. See <http://bugs.python.org/issue2016>.
|
||
|
|
|
||
|
|
>>> class Name(str):
|
||
|
|
... def __eq__(self, other):
|
||
|
|
... try:
|
||
|
|
... del x[self]
|
||
|
|
... except KeyError:
|
||
|
|
... pass
|
||
|
|
... return str.__eq__(self, other)
|
||
|
|
... def __hash__(self):
|
||
|
|
... return str.__hash__(self)
|
||
|
|
|
||
|
|
>>> x = {Name("a"):1, Name("b"):2}
|
||
|
|
>>> def f(a, b):
|
||
|
|
... print(a,b)
|
||
|
|
>>> f(**x)
|
||
|
|
1 2
|
||
|
|
|
||
|
|
Too many arguments:
|
||
|
|
|
||
|
|
>>> def f(): pass
|
||
|
|
>>> f(1)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() takes 0 positional arguments but 1 was given
|
||
|
|
>>> def f(a): pass
|
||
|
|
>>> f(1, 2)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() takes 1 positional argument but 2 were given
|
||
|
|
>>> def f(a, b=1): pass
|
||
|
|
>>> f(1, 2, 3)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() takes from 1 to 2 positional arguments but 3 were given
|
||
|
|
>>> def f(*, kw): pass
|
||
|
|
>>> f(1, kw=3)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() takes 0 positional arguments but 1 positional argument (and 1 keyword-only argument) were given
|
||
|
|
>>> def f(*, kw, b): pass
|
||
|
|
>>> f(1, 2, 3, b=3, kw=3)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() takes 0 positional arguments but 3 positional arguments (and 2 keyword-only arguments) were given
|
||
|
|
>>> def f(a, b=2, *, kw): pass
|
||
|
|
>>> f(2, 3, 4, kw=4)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() takes from 1 to 2 positional arguments but 3 positional arguments (and 1 keyword-only argument) were given
|
||
|
|
|
||
|
|
Too few and missing arguments:
|
||
|
|
|
||
|
|
>>> def f(a): pass
|
||
|
|
>>> f()
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 1 required positional argument: 'a'
|
||
|
|
>>> def f(a, b): pass
|
||
|
|
>>> f()
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 2 required positional arguments: 'a' and 'b'
|
||
|
|
>>> def f(a, b, c): pass
|
||
|
|
>>> f()
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 3 required positional arguments: 'a', 'b', and 'c'
|
||
|
|
>>> def f(a, b, c, d, e): pass
|
||
|
|
>>> f()
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 5 required positional arguments: 'a', 'b', 'c', 'd', and 'e'
|
||
|
|
>>> def f(a, b=4, c=5, d=5): pass
|
||
|
|
>>> f(c=12, b=9)
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 1 required positional argument: 'a'
|
||
|
|
|
||
|
|
Same with keyword only args:
|
||
|
|
|
||
|
|
>>> def f(*, w): pass
|
||
|
|
>>> f()
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 1 required keyword-only argument: 'w'
|
||
|
|
>>> def f(*, a, b, c, d, e): pass
|
||
|
|
>>> f()
|
||
|
|
Traceback (most recent call last):
|
||
|
|
...
|
||
|
|
TypeError: f() missing 5 required keyword-only arguments: 'a', 'b', 'c', 'd', and 'e'
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
import sys
|
||
|
|
from test import support
|
||
|
|
|
||
|
|
def test_main():
|
||
|
|
support.run_doctest(sys.modules[__name__], True)
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
test_main()
|