Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_userdict.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 1d84bf5f9478
children 51102abdec50 6768b2350c57
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1 # Check every path through every method of UserDict
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2
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3 from test import test_support, mapping_tests
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4 import UserDict
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5
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6 d0 = {}
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7 d1 = {"one": 1}
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8 d2 = {"one": 1, "two": 2}
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9 d3 = {"one": 1, "two": 3, "three": 5}
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10 d4 = {"one": None, "two": None}
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11 d5 = {"one": 1, "two": 1}
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12
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13 class UserDictTest(mapping_tests.TestHashMappingProtocol):
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14 type2test = UserDict.IterableUserDict
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15
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16 def test_all(self):
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17 # Test constructors
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18 u = UserDict.UserDict()
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19 u0 = UserDict.UserDict(d0)
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20 u1 = UserDict.UserDict(d1)
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21 u2 = UserDict.IterableUserDict(d2)
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22
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23 uu = UserDict.UserDict(u)
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24 uu0 = UserDict.UserDict(u0)
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25 uu1 = UserDict.UserDict(u1)
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26 uu2 = UserDict.UserDict(u2)
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27
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28 # keyword arg constructor
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29 self.assertEqual(UserDict.UserDict(one=1, two=2), d2)
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30 # item sequence constructor
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31 self.assertEqual(UserDict.UserDict([('one',1), ('two',2)]), d2)
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32 self.assertEqual(UserDict.UserDict(dict=[('one',1), ('two',2)]), d2)
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33 # both together
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34 self.assertEqual(UserDict.UserDict([('one',1), ('two',2)], two=3, three=5), d3)
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35
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36 # alternate constructor
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37 self.assertEqual(UserDict.UserDict.fromkeys('one two'.split()), d4)
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38 self.assertEqual(UserDict.UserDict().fromkeys('one two'.split()), d4)
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39 self.assertEqual(UserDict.UserDict.fromkeys('one two'.split(), 1), d5)
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40 self.assertEqual(UserDict.UserDict().fromkeys('one two'.split(), 1), d5)
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41 self.assert_(u1.fromkeys('one two'.split()) is not u1)
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42 self.assert_(isinstance(u1.fromkeys('one two'.split()), UserDict.UserDict))
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43 self.assert_(isinstance(u2.fromkeys('one two'.split()), UserDict.IterableUserDict))
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44
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45 # Test __repr__
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46 self.assertEqual(str(u0), str(d0))
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47 self.assertEqual(repr(u1), repr(d1))
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48 self.assertEqual(`u2`, `d2`)
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49
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50 # Test __cmp__ and __len__
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51 all = [d0, d1, d2, u, u0, u1, u2, uu, uu0, uu1, uu2]
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52 for a in all:
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53 for b in all:
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54 self.assertEqual(cmp(a, b), cmp(len(a), len(b)))
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55
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56 # Test __getitem__
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57 self.assertEqual(u2["one"], 1)
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58 self.assertRaises(KeyError, u1.__getitem__, "two")
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59
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60 # Test __setitem__
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61 u3 = UserDict.UserDict(u2)
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62 u3["two"] = 2
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63 u3["three"] = 3
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64
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65 # Test __delitem__
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66 del u3["three"]
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67 self.assertRaises(KeyError, u3.__delitem__, "three")
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68
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69 # Test clear
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70 u3.clear()
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71 self.assertEqual(u3, {})
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72
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73 # Test copy()
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74 u2a = u2.copy()
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75 self.assertEqual(u2a, u2)
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76 u2b = UserDict.UserDict(x=42, y=23)
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77 u2c = u2b.copy() # making a copy of a UserDict is special cased
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78 self.assertEqual(u2b, u2c)
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79
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80 class MyUserDict(UserDict.UserDict):
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81 def display(self): print self
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82
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83 m2 = MyUserDict(u2)
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84 m2a = m2.copy()
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85 self.assertEqual(m2a, m2)
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86
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87 # SF bug #476616 -- copy() of UserDict subclass shared data
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88 m2['foo'] = 'bar'
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89 self.assertNotEqual(m2a, m2)
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90
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91 # Test keys, items, values
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92 self.assertEqual(u2.keys(), d2.keys())
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93 self.assertEqual(u2.items(), d2.items())
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94 self.assertEqual(u2.values(), d2.values())
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95
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96 # Test has_key and "in".
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97 for i in u2.keys():
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98 self.assert_(u2.has_key(i))
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99 self.assert_(i in u2)
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100 self.assertEqual(u1.has_key(i), d1.has_key(i))
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101 self.assertEqual(i in u1, i in d1)
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102 self.assertEqual(u0.has_key(i), d0.has_key(i))
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103 self.assertEqual(i in u0, i in d0)
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104
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105 # Test update
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106 t = UserDict.UserDict()
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107 t.update(u2)
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108 self.assertEqual(t, u2)
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109 class Items:
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110 def items(self):
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111 return (("x", 42), ("y", 23))
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112 t = UserDict.UserDict()
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113 t.update(Items())
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114 self.assertEqual(t, {"x": 42, "y": 23})
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115
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116 # Test get
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117 for i in u2.keys():
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118 self.assertEqual(u2.get(i), u2[i])
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119 self.assertEqual(u1.get(i), d1.get(i))
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120 self.assertEqual(u0.get(i), d0.get(i))
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121
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122 # Test "in" iteration.
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123 for i in xrange(20):
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124 u2[i] = str(i)
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125 ikeys = []
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126 for k in u2:
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127 ikeys.append(k)
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128 keys = u2.keys()
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54ff68e973ee * Migrate set() and frozenset() from the sandbox.
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129 self.assertEqual(set(ikeys), set(keys))
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22af15f8410a Give UserDict new __contains__ and __iter__ methods.
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130
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131 # Test setdefault
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132 t = UserDict.UserDict()
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133 self.assertEqual(t.setdefault("x", 42), 42)
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134 self.assert_(t.has_key("x"))
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135 self.assertEqual(t.setdefault("x", 23), 42)
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136
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137 # Test pop
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138 t = UserDict.UserDict(x=42)
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139 self.assertEqual(t.pop("x"), 42)
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140 self.assertRaises(KeyError, t.pop, "x")
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141 self.assertEqual(t.pop("x", 1), 1)
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142 t["x"] = 42
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143 self.assertEqual(t.pop("x", 1), 42)
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144
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145 # Test popitem
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146 t = UserDict.UserDict(x=42)
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147 self.assertEqual(t.popitem(), ("x", 42))
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148 self.assertRaises(KeyError, t.popitem)
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149
36656
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150 def test_missing(self):
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151 # Make sure UserDict doesn't have a __missing__ method
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152 self.assertEqual(hasattr(UserDict, "__missing__"), False)
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153 # Test several cases:
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154 # (D) subclass defines __missing__ method returning a value
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155 # (E) subclass defines __missing__ method raising RuntimeError
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156 # (F) subclass sets __missing__ instance variable (no effect)
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157 # (G) subclass doesn't define __missing__ at a all
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158 class D(UserDict.UserDict):
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159 def __missing__(self, key):
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160 return 42
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161 d = D({1: 2, 3: 4})
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162 self.assertEqual(d[1], 2)
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163 self.assertEqual(d[3], 4)
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164 self.assert_(2 not in d)
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165 self.assert_(2 not in d.keys())
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166 self.assertEqual(d[2], 42)
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167 class E(UserDict.UserDict):
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168 def __missing__(self, key):
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169 raise RuntimeError(key)
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170 e = E()
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171 try:
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172 e[42]
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173 except RuntimeError, err:
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174 self.assertEqual(err.args, (42,))
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175 else:
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176 self.fail("e[42] didn't raise RuntimeError")
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177 class F(UserDict.UserDict):
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178 def __init__(self):
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179 # An instance variable __missing__ should have no effect
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180 self.__missing__ = lambda key: None
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181 UserDict.UserDict.__init__(self)
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182 f = F()
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183 try:
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184 f[42]
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185 except KeyError, err:
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186 self.assertEqual(err.args, (42,))
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187 else:
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188 self.fail("f[42] didn't raise KeyError")
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189 class G(UserDict.UserDict):
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190 pass
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191 g = G()
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192 try:
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193 g[42]
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194 except KeyError, err:
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195 self.assertEqual(err.args, (42,))
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196 else:
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197 self.fail("g[42] didn't raise KeyError")
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198
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199 ##########################
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200 # Test Dict Mixin
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201
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202 class SeqDict(UserDict.DictMixin):
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203 """Dictionary lookalike implemented with lists.
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204
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205 Used to test and demonstrate DictMixin
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206 """
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207 def __init__(self, other=None, **kwargs):
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208 self.keylist = []
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209 self.valuelist = []
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210 if other is not None:
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211 for (key, value) in other:
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212 self[key] = value
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213 for (key, value) in kwargs.iteritems():
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214 self[key] = value
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215 def __getitem__(self, key):
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216 try:
a4e3021eaa7d SF patch #520382: Expand shelve.py to have a full dictionary interface
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217 i = self.keylist.index(key)
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218 except ValueError:
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219 raise KeyError
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220 return self.valuelist[i]
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221 def __setitem__(self, key, value):
26593
211038505e56 Clean-up test class for DictMixin.
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222 try:
211038505e56 Clean-up test class for DictMixin.
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223 i = self.keylist.index(key)
211038505e56 Clean-up test class for DictMixin.
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224 self.valuelist[i] = value
211038505e56 Clean-up test class for DictMixin.
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225 except ValueError:
211038505e56 Clean-up test class for DictMixin.
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226 self.keylist.append(key)
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227 self.valuelist.append(value)
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228 def __delitem__(self, key):
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229 try:
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230 i = self.keylist.index(key)
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231 except ValueError:
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232 raise KeyError
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233 self.keylist.pop(i)
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234 self.valuelist.pop(i)
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235 def keys(self):
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236 return list(self.keylist)
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237 def copy(self):
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238 d = self.__class__()
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239 for key, value in self.iteritems():
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240 d[key] = value
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241 return d
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5449b7f806fb Use descriptors.
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242 @classmethod
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243 def fromkeys(cls, keys, value=None):
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244 d = cls()
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245 for key in keys:
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246 d[key] = value
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247 return d
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248
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249 class UserDictMixinTest(mapping_tests.TestMappingProtocol):
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250 type2test = SeqDict
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251
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252 def test_all(self):
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253 ## Setup test and verify working of the test class
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254
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255 # check init
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256 s = SeqDict()
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257
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258 # exercise setitem
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259 s[10] = 'ten'
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260 s[20] = 'twenty'
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261 s[30] = 'thirty'
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262
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263 # exercise delitem
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264 del s[20]
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265 # check getitem and setitem
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266 self.assertEqual(s[10], 'ten')
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267 # check keys() and delitem
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268 self.assertEqual(s.keys(), [10, 30])
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269
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270 ## Now, test the DictMixin methods one by one
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271 # has_key
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272 self.assert_(s.has_key(10))
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273 self.assert_(not s.has_key(20))
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274
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275 # __contains__
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276 self.assert_(10 in s)
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277 self.assert_(20 not in s)
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278
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279 # __iter__
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280 self.assertEqual([k for k in s], [10, 30])
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281
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282 # __len__
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283 self.assertEqual(len(s), 2)
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284
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285 # iteritems
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286 self.assertEqual(list(s.iteritems()), [(10,'ten'), (30, 'thirty')])
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287
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288 # iterkeys
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289 self.assertEqual(list(s.iterkeys()), [10, 30])
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290
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291 # itervalues
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292 self.assertEqual(list(s.itervalues()), ['ten', 'thirty'])
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293
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294 # values
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295 self.assertEqual(s.values(), ['ten', 'thirty'])
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296
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297 # items
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298 self.assertEqual(s.items(), [(10,'ten'), (30, 'thirty')])
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299
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300 # get
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301 self.assertEqual(s.get(10), 'ten')
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302 self.assertEqual(s.get(15,'fifteen'), 'fifteen')
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303 self.assertEqual(s.get(15), None)
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304
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305 # setdefault
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306 self.assertEqual(s.setdefault(40, 'forty'), 'forty')
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307 self.assertEqual(s.setdefault(10, 'null'), 'ten')
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308 del s[40]
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309
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310 # pop
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311 self.assertEqual(s.pop(10), 'ten')
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312 self.assert_(10 not in s)
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313 s[10] = 'ten'
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314 self.assertEqual(s.pop("x", 1), 1)
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315 s["x"] = 42
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316 self.assertEqual(s.pop("x", 1), 42)
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317
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318 # popitem
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319 k, v = s.popitem()
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320 self.assert_(k not in s)
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321 s[k] = v
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322
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323 # clear
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324 s.clear()
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325 self.assertEqual(len(s), 0)
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326
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327 # empty popitem
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328 self.assertRaises(KeyError, s.popitem)
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329
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330 # update
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331 s.update({10: 'ten', 20:'twenty'})
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332 self.assertEqual(s[10], 'ten')
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333 self.assertEqual(s[20], 'twenty')
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334
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335 # cmp
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336 self.assertEqual(s, {10: 'ten', 20:'twenty'})
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337 t = SeqDict()
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338 t[20] = 'twenty'
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339 t[10] = 'ten'
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340 self.assertEqual(s, t)
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341
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342 def test_main():
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343 test_support.run_unittest(
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344 UserDictTest,
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345 UserDictMixinTest
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346 )
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347
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348 if __name__ == "__main__":
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349 test_main()