1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
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
|
