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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
"""Unit tests for the keyword only argument specified in PEP 3102."""
__author__ = "Jiwon Seo"
__email__ = "seojiwon at gmail dot com"
import unittest
def posonly_sum(pos_arg1, *arg, **kwarg):
return pos_arg1 + sum(arg) + sum(kwarg.values())
def keywordonly_sum(*, k1=0, k2):
return k1 + k2
def keywordonly_nodefaults_sum(*, k1, k2):
return k1 + k2
def keywordonly_and_kwarg_sum(*, k1, k2, **kwarg):
return k1 + k2 + sum(kwarg.values())
def mixedargs_sum(a, b=0, *arg, k1, k2=0):
return a + b + k1 + k2 + sum(arg)
def mixedargs_sum2(a, b=0, *arg, k1, k2=0, **kwargs):
return a + b + k1 + k2 + sum(arg) + sum(kwargs.values())
def sortnum(*nums, reverse=False):
return sorted(list(nums), reverse=reverse)
def sortwords(*words, reverse=False, **kwargs):
return sorted(list(words), reverse=reverse)
class Foo:
def __init__(self, *, k1, k2=0):
self.k1 = k1
self.k2 = k2
def set(self, p1, *, k1, k2):
self.k1 = k1
self.k2 = k2
def sum(self):
return self.k1 + self.k2
class KeywordOnlyArgTestCase(unittest.TestCase):
def assertRaisesSyntaxError(self, codestr):
def shouldRaiseSyntaxError(s):
compile(s, "<test>", "single")
self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr)
def testSyntaxErrorForFunctionDefinition(self):
self.assertRaisesSyntaxError("def f(p, *):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, p1=100):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *k1, k1=100):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, k1, k1=100):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, **k1):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, k1, **k1):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, None, **k1):\n pass\n")
self.assertRaisesSyntaxError("def f(p, *, (k1, k2), **kw):\n pass\n")
def testSyntaxForManyArguments(self):
# more than 255 positional arguments, should compile ok
fundef = "def f(%s):\n pass\n" % ', '.join('i%d' % i for i in range(300))
compile(fundef, "<test>", "single")
# more than 255 keyword-only arguments, should compile ok
fundef = "def f(*, %s):\n pass\n" % ', '.join('i%d' % i for i in range(300))
compile(fundef, "<test>", "single")
def testTooManyPositionalErrorMessage(self):
def f(a, b=None, *, c=None):
pass
with self.assertRaises(TypeError) as exc:
f(1, 2, 3)
expected = "f() takes from 1 to 2 positional arguments but 3 were given"
self.assertEqual(str(exc.exception), expected)
def testSyntaxErrorForFunctionCall(self):
self.assertRaisesSyntaxError("f(p, k=1, p2)")
self.assertRaisesSyntaxError("f(p, k1=50, *(1,2), k1=100)")
def testRaiseErrorFuncallWithUnexpectedKeywordArgument(self):
self.assertRaises(TypeError, keywordonly_sum, ())
self.assertRaises(TypeError, keywordonly_nodefaults_sum, ())
self.assertRaises(TypeError, Foo, ())
try:
keywordonly_sum(k2=100, non_existing_arg=200)
self.fail("should raise TypeError")
except TypeError:
pass
try:
keywordonly_nodefaults_sum(k2=2)
self.fail("should raise TypeError")
except TypeError:
pass
def testFunctionCall(self):
self.assertEqual(1, posonly_sum(1))
self.assertEqual(1+2, posonly_sum(1,**{"2":2}))
self.assertEqual(1+2+3, posonly_sum(1,*(2,3)))
self.assertEqual(1+2+3+4, posonly_sum(1,*(2,3),**{"4":4}))
self.assertEqual(1, keywordonly_sum(k2=1))
self.assertEqual(1+2, keywordonly_sum(k1=1, k2=2))
self.assertEqual(1+2, keywordonly_and_kwarg_sum(k1=1, k2=2))
self.assertEqual(1+2+3, keywordonly_and_kwarg_sum(k1=1, k2=2, k3=3))
self.assertEqual(1+2+3+4,
keywordonly_and_kwarg_sum(k1=1, k2=2,
**{"a":3,"b":4}))
self.assertEqual(1+2, mixedargs_sum(1, k1=2))
self.assertEqual(1+2+3, mixedargs_sum(1, 2, k1=3))
self.assertEqual(1+2+3+4, mixedargs_sum(1, 2, k1=3, k2=4))
self.assertEqual(1+2+3+4+5, mixedargs_sum(1, 2, 3, k1=4, k2=5))
self.assertEqual(1+2, mixedargs_sum2(1, k1=2))
self.assertEqual(1+2+3, mixedargs_sum2(1, 2, k1=3))
self.assertEqual(1+2+3+4, mixedargs_sum2(1, 2, k1=3, k2=4))
self.assertEqual(1+2+3+4+5, mixedargs_sum2(1, 2, 3, k1=4, k2=5))
self.assertEqual(1+2+3+4+5+6,
mixedargs_sum2(1, 2, 3, k1=4, k2=5, k3=6))
self.assertEqual(1+2+3+4+5+6,
mixedargs_sum2(1, 2, 3, k1=4, **{'k2':5, 'k3':6}))
self.assertEqual(1, Foo(k1=1).sum())
self.assertEqual(1+2, Foo(k1=1,k2=2).sum())
self.assertEqual([1,2,3], sortnum(3,2,1))
self.assertEqual([3,2,1], sortnum(1,2,3, reverse=True))
self.assertEqual(['a','b','c'], sortwords('a','c','b'))
self.assertEqual(['c','b','a'], sortwords('a','c','b', reverse=True))
self.assertEqual(['c','b','a'],
sortwords('a','c','b', reverse=True, ignore='ignore'))
def testKwDefaults(self):
def foo(p1,p2=0, *, k1, k2=0):
return p1 + p2 + k1 + k2
self.assertEqual(2, foo.__code__.co_kwonlyargcount)
self.assertEqual({"k2":0}, foo.__kwdefaults__)
foo.__kwdefaults__ = {"k1":0}
try:
foo(1,k1=10)
self.fail("__kwdefaults__ is not properly changed")
except TypeError:
pass
def test_kwonly_methods(self):
class Example:
def f(self, *, k1=1, k2=2):
return k1, k2
self.assertEqual(Example().f(k1=1, k2=2), (1, 2))
self.assertEqual(Example.f(Example(), k1=1, k2=2), (1, 2))
self.assertRaises(TypeError, Example.f, k1=1, k2=2)
def test_issue13343(self):
# The Python compiler must scan all symbols of a function to
# determine their scope: global, local, cell...
# This was not done for the default values of keyword
# arguments in a lambda definition, and the following line
# used to fail with a SystemError.
lambda *, k1=unittest: None
def test_mangling(self):
class X:
def f(self, *, __a=42):
return __a
self.assertEqual(X().f(), 42)
def test_default_evaluation_order(self):
# See issue 16967
a = 42
with self.assertRaises(NameError) as err:
def f(v=a, x=b, *, y=c, z=d):
pass
self.assertEqual(str(err.exception), "name 'b' is not defined")
with self.assertRaises(NameError) as err:
f = lambda v=a, x=b, *, y=c, z=d: None
self.assertEqual(str(err.exception), "name 'b' is not defined")
if __name__ == "__main__":
unittest.main()
|
