Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_extcall.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents cd8d3c2d3bce
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
58751
222b6d80e769 Merged revisions 68805 via svnmerge from
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1 # -*- coding: utf-8 -*-
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2
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3 """Doctest for method/function calls.
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4
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5 We're going the use these types for extra testing
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6
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7 >>> from UserList import UserList
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8 >>> from UserDict import UserDict
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9
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10 We're defining four helper functions
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11
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12 >>> def e(a,b):
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13 ... print a, b
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14
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15 >>> def f(*a, **k):
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16 ... print a, test_support.sortdict(k)
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17
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18 >>> def g(x, *y, **z):
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19 ... print x, y, test_support.sortdict(z)
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20
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21 >>> def h(j=1, a=2, h=3):
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22 ... print j, a, h
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23
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24 Argument list examples
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25
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26 >>> f()
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27 () {}
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28 >>> f(1)
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29 (1,) {}
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30 >>> f(1, 2)
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31 (1, 2) {}
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32 >>> f(1, 2, 3)
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33 (1, 2, 3) {}
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34 >>> f(1, 2, 3, *(4, 5))
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35 (1, 2, 3, 4, 5) {}
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36 >>> f(1, 2, 3, *[4, 5])
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37 (1, 2, 3, 4, 5) {}
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38 >>> f(1, 2, 3, *UserList([4, 5]))
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39 (1, 2, 3, 4, 5) {}
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40
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41 Here we add keyword arguments
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42
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43 >>> f(1, 2, 3, **{'a':4, 'b':5})
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44 (1, 2, 3) {'a': 4, 'b': 5}
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45 >>> f(1, 2, 3, *[4, 5], **{'a':6, 'b':7})
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46 (1, 2, 3, 4, 5) {'a': 6, 'b': 7}
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47 >>> f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b': 9})
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48 (1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
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49
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50 >>> f(1, 2, 3, **UserDict(a=4, b=5))
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51 (1, 2, 3) {'a': 4, 'b': 5}
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52 >>> f(1, 2, 3, *(4, 5), **UserDict(a=6, b=7))
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53 (1, 2, 3, 4, 5) {'a': 6, 'b': 7}
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54 >>> f(1, 2, 3, x=4, y=5, *(6, 7), **UserDict(a=8, b=9))
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55 (1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
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56
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57 Examples with invalid arguments (TypeErrors). We're also testing the function
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58 names in the exception messages.
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59
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60 Verify clearing of SF bug #733667
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61
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62 >>> e(c=4)
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63 Traceback (most recent call last):
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64 ...
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65 TypeError: e() got an unexpected keyword argument 'c'
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66
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67 >>> g()
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68 Traceback (most recent call last):
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69 ...
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70 TypeError: g() takes at least 1 argument (0 given)
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71
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72 >>> g(*())
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73 Traceback (most recent call last):
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74 ...
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75 TypeError: g() takes at least 1 argument (0 given)
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76
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77 >>> g(*(), **{})
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78 Traceback (most recent call last):
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79 ...
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80 TypeError: g() takes at least 1 argument (0 given)
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81
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82 >>> g(1)
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83 1 () {}
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84 >>> g(1, 2)
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85 1 (2,) {}
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86 >>> g(1, 2, 3)
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87 1 (2, 3) {}
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88 >>> g(1, 2, 3, *(4, 5))
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89 1 (2, 3, 4, 5) {}
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90
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91 >>> class Nothing: pass
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92 ...
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93 >>> g(*Nothing())
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94 Traceback (most recent call last):
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95 ...
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96 TypeError: g() argument after * must be a sequence, not instance
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97
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98 >>> class Nothing:
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99 ... def __len__(self): return 5
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100 ...
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101
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102 >>> g(*Nothing())
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103 Traceback (most recent call last):
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104 ...
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105 TypeError: g() argument after * must be a sequence, not instance
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106
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107 >>> class Nothing():
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108 ... def __len__(self): return 5
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109 ... def __getitem__(self, i):
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110 ... if i<3: return i
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111 ... else: raise IndexError(i)
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112 ...
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113
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114 >>> g(*Nothing())
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115 0 (1, 2) {}
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116
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117 >>> class Nothing:
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118 ... def __init__(self): self.c = 0
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119 ... def __iter__(self): return self
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120 ... def next(self):
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121 ... if self.c == 4:
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122 ... raise StopIteration
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123 ... c = self.c
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124 ... self.c += 1
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125 ... return c
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126 ...
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127
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128 >>> g(*Nothing())
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129 0 (1, 2, 3) {}
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130
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131 Make sure that the function doesn't stomp the dictionary
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132
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133 >>> d = {'a': 1, 'b': 2, 'c': 3}
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134 >>> d2 = d.copy()
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135 >>> g(1, d=4, **d)
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136 1 () {'a': 1, 'b': 2, 'c': 3, 'd': 4}
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137 >>> d == d2
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138 True
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139
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140 What about willful misconduct?
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141
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142 >>> def saboteur(**kw):
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143 ... kw['x'] = 'm'
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144 ... return kw
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145
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146 >>> d = {}
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147 >>> kw = saboteur(a=1, **d)
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148 >>> d
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149 {}
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a405732a262d Patch #1686487: you can now pass any mapping after '**' in function calls.
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150
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151
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152 >>> g(1, 2, 3, **{'x': 4, 'y': 5})
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153 Traceback (most recent call last):
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154 ...
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155 TypeError: g() got multiple values for keyword argument 'x'
29339
fc286e28556f SF bug #733667: kwargs handled incorrectly
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156
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157 >>> f(**{1:2})
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158 Traceback (most recent call last):
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159 ...
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160 TypeError: f() keywords must be strings
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161
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162 >>> h(**{'e': 2})
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163 Traceback (most recent call last):
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164 ...
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165 TypeError: h() got an unexpected keyword argument 'e'
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166
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167 >>> h(*h)
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168 Traceback (most recent call last):
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169 ...
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170 TypeError: h() argument after * must be a sequence, not function
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171
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172 >>> dir(*h)
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173 Traceback (most recent call last):
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174 ...
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175 TypeError: dir() argument after * must be a sequence, not function
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176
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177 >>> None(*h)
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178 Traceback (most recent call last):
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179 ...
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180 TypeError: NoneType object argument after * must be a sequence, \
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181 not function
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182
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183 >>> h(**h)
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184 Traceback (most recent call last):
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185 ...
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186 TypeError: h() argument after ** must be a mapping, not function
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187
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188 >>> dir(**h)
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189 Traceback (most recent call last):
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190 ...
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191 TypeError: dir() argument after ** must be a mapping, not function
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192
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193 >>> None(**h)
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194 Traceback (most recent call last):
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195 ...
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196 TypeError: NoneType object argument after ** must be a mapping, \
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197 not function
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198
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199 >>> dir(b=1, **{'b': 1})
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200 Traceback (most recent call last):
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201 ...
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202 TypeError: dir() got multiple values for keyword argument 'b'
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203
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204 Another helper function
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205
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206 >>> def f2(*a, **b):
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207 ... return a, b
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208
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209
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210 >>> d = {}
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211 >>> for i in xrange(512):
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212 ... key = 'k%d' % i
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213 ... d[key] = i
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214 >>> a, b = f2(1, *(2,3), **d)
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215 >>> len(a), len(b), b == d
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216 (3, 512, True)
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217
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218 >>> class Foo:
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219 ... def method(self, arg1, arg2):
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220 ... return arg1+arg2
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221
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222 >>> x = Foo()
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223 >>> Foo.method(*(x, 1, 2))
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224 3
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225 >>> Foo.method(x, *(1, 2))
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226 3
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227 >>> Foo.method(*(1, 2, 3))
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228 Traceback (most recent call last):
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229 ...
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230 TypeError: unbound method method() must be called with Foo instance as \
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231 first argument (got int instance instead)
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232
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233 >>> Foo.method(1, *[2, 3])
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234 Traceback (most recent call last):
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235 ...
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236 TypeError: unbound method method() must be called with Foo instance as \
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237 first argument (got int instance instead)
15364
09952d6ed372 Fix for SF bug #117241
Jeremy Hylton <jeremy@alum.mit.edu>
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238
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239 A PyCFunction that takes only positional parameters should allow an
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240 empty keyword dictionary to pass without a complaint, but raise a
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241 TypeError if te dictionary is not empty
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242
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243 >>> try:
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244 ... silence = id(1, *{})
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245 ... True
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246 ... except:
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247 ... False
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248 True
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249
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250 >>> id(1, **{'foo': 1})
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251 Traceback (most recent call last):
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252 ...
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253 TypeError: id() takes no keyword arguments
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254
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255 A corner case of keyword dictionary items being deleted during
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256 the function call setup. See <http://bugs.python.org/issue2016>.
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257
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258 >>> class Name(str):
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259 ... def __eq__(self, other):
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260 ... try:
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261 ... del x[self]
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262 ... except KeyError:
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263 ... pass
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264 ... return str.__eq__(self, other)
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265 ... def __hash__(self):
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266 ... return str.__hash__(self)
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267
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268 >>> x = {Name("a"):1, Name("b"):2}
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269 >>> def f(a, b):
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270 ... print a,b
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271 >>> f(**x)
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272 1 2
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273
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274 A obscure message:
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275
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276 >>> def f(a, b):
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277 ... pass
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278 >>> f(b=1)
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279 Traceback (most recent call last):
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280 ...
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281 TypeError: f() takes exactly 2 arguments (1 given)
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282
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283 The number of arguments passed in includes keywords:
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284
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285 >>> def f(a):
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286 ... pass
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287 >>> f(6, a=4, *(1, 2, 3))
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288 Traceback (most recent call last):
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289 ...
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290 TypeError: f() takes exactly 1 argument (5 given)
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291 """
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292
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293 import unittest
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294 import sys
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295 from test import test_support
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296
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297
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298 class ExtCallTest(unittest.TestCase):
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299
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300 def test_unicode_keywords(self):
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301 def f(a):
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302 return a
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303 self.assertEqual(f(**{u'a': 4}), 4)
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304 self.assertRaises(TypeError, f, **{u'stören': 4})
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305 self.assertRaises(TypeError, f, **{u'someLongString':2})
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306 try:
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307 f(a=4, **{u'a': 4})
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308 except TypeError:
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309 pass
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310 else:
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311 self.fail("duplicate arguments didn't raise")
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312
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313
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314 def test_main():
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315 test_support.run_doctest(sys.modules[__name__], True)
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316 test_support.run_unittest(ExtCallTest)
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317
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318 if __name__ == '__main__':
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319 test_main()