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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
class Foo:
def method(self, arg1, arg2):
return arg1 + arg2
x = Foo()
print Foo.method(*(x, 1, 2))
print Foo.method(x, *(1, 2))
try:
print Foo.method(*(1, 2, 3))
except TypeError, err:
print err
try:
print Foo.method(1, *(2, 3))
except TypeError, err:
print err
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