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