mirror of
https://github.com/python/cpython.git
synced 2025-10-03 21:55:41 +00:00
93602e3af7
bpo-27286 fixed a problem where BUILD_MAP_UNPACK_WITH_CALL could be emitted with an incorrect oparg value, causing the eval loop to access the wrong stack entry when attempting to read the function name. The associated magic number change caused significant problems when attempting to upgrade to 3.5.3 for anyone that relies on pre-cached bytecode remaining valid across maintenance releases. This patch restores the ability to import legacy bytecode generated by 3.5.0, 3.5.1 or 3.5.2, and modifies the eval loop to avoid any harmful consequences from the potentially malformed legacy bytecode. Original import patch by Petr Viktorin, eval loop patch by Serhiy Storchaka, and tests and integration by Nick Coghlan.
444 lines
12 KiB
Python
444 lines
12 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: function 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: function 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: function 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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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: 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: 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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>>> 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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>>> 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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>>> 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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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: f() 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: 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: h() argument 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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>>> None(*h)
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Traceback (most recent call last):
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...
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TypeError: NoneType object 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: 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: 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: 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: 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: 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: 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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>>> None(**h)
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Traceback (most recent call last):
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...
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TypeError: NoneType object 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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Another helper function
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>>> def f2(*a, **b):
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... return a, b
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>>> d = {}
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>>> for i in range(512):
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... key = 'k%d' % i
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... d[key] = i
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>>> a, b = f2(1, *(2,3), **d)
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>>> len(a), len(b), b == d
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(3, 512, True)
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>>> class Foo:
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... def method(self, arg1, arg2):
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... return arg1+arg2
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>>> x = Foo()
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>>> Foo.method(*(x, 1, 2))
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3
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>>> Foo.method(x, *(1, 2))
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3
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>>> Foo.method(*(1, 2, 3))
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5
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>>> Foo.method(1, *[2, 3])
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5
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A PyCFunction that takes only positional parameters should allow an
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empty keyword dictionary to pass without a complaint, but raise a
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TypeError if te dictionary is not empty
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>>> try:
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... silence = id(1, *{})
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... True
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... except:
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... False
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True
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>>> id(1, **{'foo': 1})
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Traceback (most recent call last):
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...
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TypeError: id() takes no keyword arguments
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A corner case of keyword dictionary items being deleted during
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the function call setup. See <http://bugs.python.org/issue2016>.
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>>> class Name(str):
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... def __eq__(self, other):
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... try:
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... del x[self]
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... except KeyError:
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... pass
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... return str.__eq__(self, other)
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... def __hash__(self):
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... return str.__hash__(self)
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>>> x = {Name("a"):1, Name("b"):2}
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>>> def f(a, b):
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... print(a,b)
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>>> f(**x)
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1 2
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Too many arguments:
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>>> def f(): pass
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>>> f(1)
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Traceback (most recent call last):
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...
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TypeError: f() takes 0 positional arguments but 1 was given
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>>> def f(a): pass
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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: f() takes 1 positional argument but 2 were given
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>>> def f(a, b=1): pass
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>>> f(1, 2, 3)
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Traceback (most recent call last):
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...
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TypeError: f() takes from 1 to 2 positional arguments but 3 were given
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>>> def f(*, kw): pass
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>>> f(1, kw=3)
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Traceback (most recent call last):
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...
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TypeError: f() takes 0 positional arguments but 1 positional argument (and 1 keyword-only argument) were given
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>>> def f(*, kw, b): pass
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>>> f(1, 2, 3, b=3, kw=3)
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Traceback (most recent call last):
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...
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TypeError: f() takes 0 positional arguments but 3 positional arguments (and 2 keyword-only arguments) were given
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>>> def f(a, b=2, *, kw): pass
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>>> f(2, 3, 4, kw=4)
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Traceback (most recent call last):
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...
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TypeError: f() takes from 1 to 2 positional arguments but 3 positional arguments (and 1 keyword-only argument) were given
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Too few and missing arguments:
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>>> def f(a): pass
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>>> f()
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Traceback (most recent call last):
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...
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TypeError: f() missing 1 required positional argument: 'a'
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>>> def f(a, b): pass
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>>> f()
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Traceback (most recent call last):
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...
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TypeError: f() missing 2 required positional arguments: 'a' and 'b'
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>>> def f(a, b, c): pass
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>>> f()
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Traceback (most recent call last):
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...
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TypeError: f() missing 3 required positional arguments: 'a', 'b', and 'c'
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>>> def f(a, b, c, d, e): pass
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>>> f()
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Traceback (most recent call last):
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...
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TypeError: f() missing 5 required positional arguments: 'a', 'b', 'c', 'd', and 'e'
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>>> def f(a, b=4, c=5, d=5): pass
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>>> f(c=12, b=9)
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Traceback (most recent call last):
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...
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TypeError: f() missing 1 required positional argument: 'a'
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Same with keyword only args:
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>>> def f(*, w): pass
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>>> f()
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Traceback (most recent call last):
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...
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TypeError: f() missing 1 required keyword-only argument: 'w'
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>>> def f(*, a, b, c, d, e): pass
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>>> f()
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Traceback (most recent call last):
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...
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TypeError: f() missing 5 required keyword-only arguments: 'a', 'b', 'c', 'd', and 'e'
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"""
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import sys
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from test import support
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def test_main():
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support.run_doctest(sys.modules[__name__], True)
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if __name__ == '__main__':
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test_main()
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