mirror of
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146 lines
2.7 KiB
Python
146 lines
2.7 KiB
Python
from UserList import UserList
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def f(*a, **k):
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print a, k
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def g(x, *y, **z):
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print x, y, 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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f()
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f(1)
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f(1, 2)
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f(1, 2, 3)
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f(1, 2, 3, *(4, 5))
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f(1, 2, 3, *[4, 5])
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f(1, 2, 3, *UserList([4, 5]))
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f(1, 2, 3, **{'a':4, 'b':5})
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f(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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try:
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g()
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except TypeError, err:
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print "TypeError:", err
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else:
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print "should raise TypeError: not enough arguments; expected 1, got 0"
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try:
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g(*())
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except TypeError, err:
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print "TypeError:", err
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else:
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print "should raise TypeError: not enough arguments; expected 1, got 0"
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try:
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g(*(), **{})
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except TypeError, err:
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print "TypeError:", err
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else:
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print "should raise TypeError: not enough arguments; expected 1, got 0"
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g(1)
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g(1, 2)
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g(1, 2, 3)
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g(1, 2, 3, *(4, 5))
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class Nothing: pass
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try:
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g(*Nothing())
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except AttributeError, attr:
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pass
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else:
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print "should raise AttributeError: __len__"
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class Nothing:
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def __len__(self):
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return 5
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try:
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g(*Nothing())
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except AttributeError, attr:
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pass
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else:
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print "should raise AttributeError: __getitem__"
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class Nothing:
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def __len__(self):
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return 5
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def __getitem__(self, i):
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if i < 3:
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return i
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else:
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raise IndexError, i
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g(*Nothing())
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# make sure the function call doesn't stomp on the dictionary?
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d = {'a': 1, 'b': 2, 'c': 3}
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d2 = d.copy()
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assert d == d2
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g(1, d=4, **d)
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print d
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print d2
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assert d == d2, "function call modified dictionary"
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# what about willful misconduct?
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def saboteur(**kw):
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kw['x'] = locals() # yields a cyclic kw
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return kw
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d = {}
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kw = saboteur(a=1, **d)
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assert d == {}
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# break the cycle
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del kw['x']
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try:
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g(1, 2, 3, **{'x':4, 'y':5})
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except TypeError, err:
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print err
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else:
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print "should raise TypeError: keyword parameter redefined"
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try:
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g(1, 2, 3, a=4, b=5, *(6, 7), **{'a':8, 'b':9})
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except TypeError, err:
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print err
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else:
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print "should raise TypeError: keyword parameter redefined"
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try:
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f(**{1:2})
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except TypeError, err:
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print err
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else:
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print "should raise TypeError: keywords must be strings"
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try:
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h(**{'e': 2})
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except TypeError, err:
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print err
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else:
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print "should raise TypeError: unexpected keyword argument: e"
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try:
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h(*h)
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except TypeError, err:
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print err
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else:
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print "should raise TypeError: * argument must be a tuple"
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try:
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h(**h)
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except TypeError, err:
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print err
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else:
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print "should raise TypeError: ** argument must be a dictionary"
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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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print len(a), len(b), b == d
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