mirror of
https://github.com/python/cpython.git
synced 2024-11-28 08:20:55 +01:00
074c3e62d1
If a non-tuple sequence is passed as the *arg, convert it to a tuple before checking its length. If named keyword arguments are used in combination with **kwargs, make a copy of kwargs before inserting the new keys.
144 lines
2.7 KiB
Python
144 lines
2.7 KiB
Python
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:
|
|
assert attr[0] == '__len__'
|
|
else:
|
|
print "should raise AttributeError: __len__"
|
|
|
|
class Nothing:
|
|
def __len__(self):
|
|
return 5
|
|
try:
|
|
g(*Nothing())
|
|
except AttributeError, attr:
|
|
assert attr[0] == '__getitem__'
|
|
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()
|
|
d = {}
|
|
saboteur(a=1, **d)
|
|
assert d == {}
|
|
|
|
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
|