1 | import unittest |
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2 | import struct |
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3 | import sys |
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4 | from test import test_support, string_tests |
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5 | |
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6 | |
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7 | class StrSubclass(str): |
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8 | pass |
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9 | |
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10 | class StrTest( |
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11 | string_tests.CommonTest, |
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12 | string_tests.MixinStrUnicodeUserStringTest, |
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13 | string_tests.MixinStrUserStringTest, |
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14 | string_tests.MixinStrUnicodeTest, |
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15 | ): |
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16 | |
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17 | type2test = str |
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18 | |
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19 | # We don't need to propagate to str |
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20 | def fixtype(self, obj): |
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21 | return obj |
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22 | |
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23 | def test_basic_creation(self): |
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24 | self.assertEqual(str(''), '') |
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25 | self.assertEqual(str(0), '0') |
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26 | self.assertEqual(str(0L), '0') |
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27 | self.assertEqual(str(()), '()') |
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28 | self.assertEqual(str([]), '[]') |
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29 | self.assertEqual(str({}), '{}') |
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30 | a = [] |
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31 | a.append(a) |
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32 | self.assertEqual(str(a), '[[...]]') |
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33 | a = {} |
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34 | a[0] = a |
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35 | self.assertEqual(str(a), '{0: {...}}') |
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36 | |
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37 | def test_formatting(self): |
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38 | string_tests.MixinStrUnicodeUserStringTest.test_formatting(self) |
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39 | self.assertRaises(OverflowError, '%c'.__mod__, 0x1234) |
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40 | |
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41 | @test_support.cpython_only |
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42 | def test_formatting_huge_precision(self): |
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43 | from _testcapi import INT_MAX |
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44 | format_string = "%.{}f".format(INT_MAX + 1) |
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45 | with self.assertRaises(ValueError): |
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46 | result = format_string % 2.34 |
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47 | |
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48 | def test_formatting_huge_width(self): |
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49 | format_string = "%{}f".format(sys.maxsize + 1) |
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50 | with self.assertRaises(ValueError): |
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51 | result = format_string % 2.34 |
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52 | |
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53 | def test_conversion(self): |
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54 | # Make sure __str__() behaves properly |
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55 | class Foo0: |
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56 | def __unicode__(self): |
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57 | return u"foo" |
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58 | |
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59 | class Foo1: |
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60 | def __str__(self): |
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61 | return "foo" |
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62 | |
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63 | class Foo2(object): |
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64 | def __str__(self): |
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65 | return "foo" |
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66 | |
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67 | class Foo3(object): |
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68 | def __str__(self): |
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69 | return u"foo" |
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70 | |
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71 | class Foo4(unicode): |
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72 | def __str__(self): |
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73 | return u"foo" |
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74 | |
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75 | class Foo5(str): |
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76 | def __str__(self): |
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77 | return u"foo" |
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78 | |
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79 | class Foo6(str): |
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80 | def __str__(self): |
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81 | return "foos" |
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82 | |
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83 | def __unicode__(self): |
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84 | return u"foou" |
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85 | |
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86 | class Foo7(unicode): |
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87 | def __str__(self): |
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88 | return "foos" |
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89 | def __unicode__(self): |
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90 | return u"foou" |
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91 | |
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92 | class Foo8(str): |
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93 | def __new__(cls, content=""): |
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94 | return str.__new__(cls, 2*content) |
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95 | def __str__(self): |
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96 | return self |
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97 | |
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98 | class Foo9(str): |
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99 | def __str__(self): |
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100 | return "string" |
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101 | def __unicode__(self): |
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102 | return "not unicode" |
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103 | |
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104 | self.assertTrue(str(Foo0()).startswith("<")) # this is different from __unicode__ |
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105 | self.assertEqual(str(Foo1()), "foo") |
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106 | self.assertEqual(str(Foo2()), "foo") |
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107 | self.assertEqual(str(Foo3()), "foo") |
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108 | self.assertEqual(str(Foo4("bar")), "foo") |
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109 | self.assertEqual(str(Foo5("bar")), "foo") |
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110 | self.assertEqual(str(Foo6("bar")), "foos") |
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111 | self.assertEqual(str(Foo7("bar")), "foos") |
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112 | self.assertEqual(str(Foo8("foo")), "foofoo") |
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113 | self.assertIs(type(str(Foo8("foo"))), Foo8) |
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114 | self.assertEqual(StrSubclass(Foo8("foo")), "foofoo") |
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115 | self.assertIs(type(StrSubclass(Foo8("foo"))), StrSubclass) |
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116 | self.assertEqual(str(Foo9("foo")), "string") |
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117 | self.assertEqual(unicode(Foo9("foo")), u"not unicode") |
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118 | |
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119 | # This test only affects 32-bit platforms because expandtabs can only take |
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120 | # an int as the max value, not a 64-bit C long. If expandtabs is changed |
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121 | # to take a 64-bit long, this test should apply to all platforms. |
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122 | @unittest.skipIf(sys.maxint > (1 << 32) or struct.calcsize('P') != 4, |
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123 | 'only applies to 32-bit platforms') |
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124 | def test_expandtabs_overflows_gracefully(self): |
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125 | self.assertRaises(OverflowError, 't\tt\t'.expandtabs, sys.maxint) |
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126 | |
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127 | def test__format__(self): |
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128 | def test(value, format, expected): |
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129 | # test both with and without the trailing 's' |
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130 | self.assertEqual(value.__format__(format), expected) |
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131 | self.assertEqual(value.__format__(format + 's'), expected) |
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132 | |
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133 | test('', '', '') |
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134 | test('abc', '', 'abc') |
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135 | test('abc', '.3', 'abc') |
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136 | test('ab', '.3', 'ab') |
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137 | test('abcdef', '.3', 'abc') |
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138 | test('abcdef', '.0', '') |
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139 | test('abc', '3.3', 'abc') |
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140 | test('abc', '2.3', 'abc') |
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141 | test('abc', '2.2', 'ab') |
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142 | test('abc', '3.2', 'ab ') |
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143 | test('result', 'x<0', 'result') |
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144 | test('result', 'x<5', 'result') |
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145 | test('result', 'x<6', 'result') |
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146 | test('result', 'x<7', 'resultx') |
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147 | test('result', 'x<8', 'resultxx') |
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148 | test('result', ' <7', 'result ') |
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149 | test('result', '<7', 'result ') |
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150 | test('result', '>7', ' result') |
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151 | test('result', '>8', ' result') |
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152 | test('result', '^8', ' result ') |
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153 | test('result', '^9', ' result ') |
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154 | test('result', '^10', ' result ') |
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155 | test('a', '10000', 'a' + ' ' * 9999) |
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156 | test('', '10000', ' ' * 10000) |
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157 | test('', '10000000', ' ' * 10000000) |
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158 | |
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159 | def test_format(self): |
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160 | self.assertEqual(''.format(), '') |
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161 | self.assertEqual('a'.format(), 'a') |
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162 | self.assertEqual('ab'.format(), 'ab') |
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163 | self.assertEqual('a{{'.format(), 'a{') |
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164 | self.assertEqual('a}}'.format(), 'a}') |
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165 | self.assertEqual('{{b'.format(), '{b') |
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166 | self.assertEqual('}}b'.format(), '}b') |
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167 | self.assertEqual('a{{b'.format(), 'a{b') |
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168 | |
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169 | # examples from the PEP: |
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170 | import datetime |
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171 | self.assertEqual("My name is {0}".format('Fred'), "My name is Fred") |
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172 | self.assertEqual("My name is {0[name]}".format(dict(name='Fred')), |
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173 | "My name is Fred") |
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174 | self.assertEqual("My name is {0} :-{{}}".format('Fred'), |
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175 | "My name is Fred :-{}") |
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176 | |
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177 | d = datetime.date(2007, 8, 18) |
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178 | self.assertEqual("The year is {0.year}".format(d), |
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179 | "The year is 2007") |
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180 | |
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181 | # classes we'll use for testing |
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182 | class C: |
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183 | def __init__(self, x=100): |
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184 | self._x = x |
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185 | def __format__(self, spec): |
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186 | return spec |
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187 | |
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188 | class D: |
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189 | def __init__(self, x): |
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190 | self.x = x |
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191 | def __format__(self, spec): |
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192 | return str(self.x) |
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193 | |
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194 | # class with __str__, but no __format__ |
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195 | class E: |
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196 | def __init__(self, x): |
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197 | self.x = x |
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198 | def __str__(self): |
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199 | return 'E(' + self.x + ')' |
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200 | |
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201 | # class with __repr__, but no __format__ or __str__ |
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202 | class F: |
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203 | def __init__(self, x): |
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204 | self.x = x |
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205 | def __repr__(self): |
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206 | return 'F(' + self.x + ')' |
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207 | |
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208 | # class with __format__ that forwards to string, for some format_spec's |
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209 | class G: |
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210 | def __init__(self, x): |
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211 | self.x = x |
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212 | def __str__(self): |
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213 | return "string is " + self.x |
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214 | def __format__(self, format_spec): |
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215 | if format_spec == 'd': |
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216 | return 'G(' + self.x + ')' |
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217 | return object.__format__(self, format_spec) |
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218 | |
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219 | # class that returns a bad type from __format__ |
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220 | class H: |
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221 | def __format__(self, format_spec): |
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222 | return 1.0 |
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223 | |
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224 | class I(datetime.date): |
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225 | def __format__(self, format_spec): |
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226 | return self.strftime(format_spec) |
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227 | |
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228 | class J(int): |
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229 | def __format__(self, format_spec): |
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230 | return int.__format__(self * 2, format_spec) |
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231 | |
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232 | |
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233 | self.assertEqual(''.format(), '') |
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234 | self.assertEqual('abc'.format(), 'abc') |
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235 | self.assertEqual('{0}'.format('abc'), 'abc') |
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236 | self.assertEqual('{0:}'.format('abc'), 'abc') |
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237 | self.assertEqual('X{0}'.format('abc'), 'Xabc') |
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238 | self.assertEqual('{0}X'.format('abc'), 'abcX') |
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239 | self.assertEqual('X{0}Y'.format('abc'), 'XabcY') |
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240 | self.assertEqual('{1}'.format(1, 'abc'), 'abc') |
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241 | self.assertEqual('X{1}'.format(1, 'abc'), 'Xabc') |
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242 | self.assertEqual('{1}X'.format(1, 'abc'), 'abcX') |
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243 | self.assertEqual('X{1}Y'.format(1, 'abc'), 'XabcY') |
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244 | self.assertEqual('{0}'.format(-15), '-15') |
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245 | self.assertEqual('{0}{1}'.format(-15, 'abc'), '-15abc') |
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246 | self.assertEqual('{0}X{1}'.format(-15, 'abc'), '-15Xabc') |
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247 | self.assertEqual('{{'.format(), '{') |
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248 | self.assertEqual('}}'.format(), '}') |
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249 | self.assertEqual('{{}}'.format(), '{}') |
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250 | self.assertEqual('{{x}}'.format(), '{x}') |
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251 | self.assertEqual('{{{0}}}'.format(123), '{123}') |
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252 | self.assertEqual('{{{{0}}}}'.format(), '{{0}}') |
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253 | self.assertEqual('}}{{'.format(), '}{') |
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254 | self.assertEqual('}}x{{'.format(), '}x{') |
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255 | |
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256 | # weird field names |
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257 | self.assertEqual("{0[foo-bar]}".format({'foo-bar':'baz'}), 'baz') |
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258 | self.assertEqual("{0[foo bar]}".format({'foo bar':'baz'}), 'baz') |
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259 | self.assertEqual("{0[ ]}".format({' ':3}), '3') |
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260 | |
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261 | self.assertEqual('{foo._x}'.format(foo=C(20)), '20') |
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262 | self.assertEqual('{1}{0}'.format(D(10), D(20)), '2010') |
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263 | self.assertEqual('{0._x.x}'.format(C(D('abc'))), 'abc') |
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264 | self.assertEqual('{0[0]}'.format(['abc', 'def']), 'abc') |
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265 | self.assertEqual('{0[1]}'.format(['abc', 'def']), 'def') |
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266 | self.assertEqual('{0[1][0]}'.format(['abc', ['def']]), 'def') |
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267 | self.assertEqual('{0[1][0].x}'.format(['abc', [D('def')]]), 'def') |
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268 | |
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269 | # strings |
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270 | self.assertEqual('{0:.3s}'.format('abc'), 'abc') |
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271 | self.assertEqual('{0:.3s}'.format('ab'), 'ab') |
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272 | self.assertEqual('{0:.3s}'.format('abcdef'), 'abc') |
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273 | self.assertEqual('{0:.0s}'.format('abcdef'), '') |
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274 | self.assertEqual('{0:3.3s}'.format('abc'), 'abc') |
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275 | self.assertEqual('{0:2.3s}'.format('abc'), 'abc') |
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276 | self.assertEqual('{0:2.2s}'.format('abc'), 'ab') |
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277 | self.assertEqual('{0:3.2s}'.format('abc'), 'ab ') |
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278 | self.assertEqual('{0:x<0s}'.format('result'), 'result') |
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279 | self.assertEqual('{0:x<5s}'.format('result'), 'result') |
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280 | self.assertEqual('{0:x<6s}'.format('result'), 'result') |
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281 | self.assertEqual('{0:x<7s}'.format('result'), 'resultx') |
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282 | self.assertEqual('{0:x<8s}'.format('result'), 'resultxx') |
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283 | self.assertEqual('{0: <7s}'.format('result'), 'result ') |
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284 | self.assertEqual('{0:<7s}'.format('result'), 'result ') |
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285 | self.assertEqual('{0:>7s}'.format('result'), ' result') |
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286 | self.assertEqual('{0:>8s}'.format('result'), ' result') |
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287 | self.assertEqual('{0:^8s}'.format('result'), ' result ') |
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288 | self.assertEqual('{0:^9s}'.format('result'), ' result ') |
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289 | self.assertEqual('{0:^10s}'.format('result'), ' result ') |
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290 | self.assertEqual('{0:10000}'.format('a'), 'a' + ' ' * 9999) |
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291 | self.assertEqual('{0:10000}'.format(''), ' ' * 10000) |
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292 | self.assertEqual('{0:10000000}'.format(''), ' ' * 10000000) |
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293 | |
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294 | # format specifiers for user defined type |
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295 | self.assertEqual('{0:abc}'.format(C()), 'abc') |
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296 | |
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297 | # !r and !s coercions |
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298 | self.assertEqual('{0!s}'.format('Hello'), 'Hello') |
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299 | self.assertEqual('{0!s:}'.format('Hello'), 'Hello') |
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300 | self.assertEqual('{0!s:15}'.format('Hello'), 'Hello ') |
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301 | self.assertEqual('{0!s:15s}'.format('Hello'), 'Hello ') |
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302 | self.assertEqual('{0!r}'.format('Hello'), "'Hello'") |
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303 | self.assertEqual('{0!r:}'.format('Hello'), "'Hello'") |
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304 | self.assertEqual('{0!r}'.format(F('Hello')), 'F(Hello)') |
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305 | |
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306 | # test fallback to object.__format__ |
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307 | self.assertEqual('{0}'.format({}), '{}') |
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308 | self.assertEqual('{0}'.format([]), '[]') |
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309 | self.assertEqual('{0}'.format([1]), '[1]') |
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310 | self.assertEqual('{0}'.format(E('data')), 'E(data)') |
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311 | self.assertEqual('{0:d}'.format(G('data')), 'G(data)') |
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312 | self.assertEqual('{0!s}'.format(G('data')), 'string is data') |
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313 | |
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314 | msg = 'object.__format__ with a non-empty format string is deprecated' |
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315 | with test_support.check_warnings((msg, PendingDeprecationWarning)): |
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316 | self.assertEqual('{0:^10}'.format(E('data')), ' E(data) ') |
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317 | self.assertEqual('{0:^10s}'.format(E('data')), ' E(data) ') |
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318 | self.assertEqual('{0:>15s}'.format(G('data')), ' string is data') |
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319 | |
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320 | self.assertEqual("{0:date: %Y-%m-%d}".format(I(year=2007, |
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321 | month=8, |
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322 | day=27)), |
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323 | "date: 2007-08-27") |
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324 | |
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325 | # test deriving from a builtin type and overriding __format__ |
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326 | self.assertEqual("{0}".format(J(10)), "20") |
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327 | |
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328 | |
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329 | # string format specifiers |
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330 | self.assertEqual('{0:}'.format('a'), 'a') |
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331 | |
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332 | # computed format specifiers |
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333 | self.assertEqual("{0:.{1}}".format('hello world', 5), 'hello') |
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334 | self.assertEqual("{0:.{1}s}".format('hello world', 5), 'hello') |
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335 | self.assertEqual("{0:.{precision}s}".format('hello world', precision=5), 'hello') |
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336 | self.assertEqual("{0:{width}.{precision}s}".format('hello world', width=10, precision=5), 'hello ') |
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337 | self.assertEqual("{0:{width}.{precision}s}".format('hello world', width='10', precision='5'), 'hello ') |
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338 | |
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339 | # test various errors |
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340 | self.assertRaises(ValueError, '{'.format) |
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341 | self.assertRaises(ValueError, '}'.format) |
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342 | self.assertRaises(ValueError, 'a{'.format) |
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343 | self.assertRaises(ValueError, 'a}'.format) |
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344 | self.assertRaises(ValueError, '{a'.format) |
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345 | self.assertRaises(ValueError, '}a'.format) |
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346 | self.assertRaises(IndexError, '{0}'.format) |
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347 | self.assertRaises(IndexError, '{1}'.format, 'abc') |
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348 | self.assertRaises(KeyError, '{x}'.format) |
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349 | self.assertRaises(ValueError, "}{".format) |
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350 | self.assertRaises(ValueError, "{".format) |
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351 | self.assertRaises(ValueError, "}".format) |
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352 | self.assertRaises(ValueError, "abc{0:{}".format) |
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353 | self.assertRaises(ValueError, "{0".format) |
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354 | self.assertRaises(IndexError, "{0.}".format) |
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355 | self.assertRaises(ValueError, "{0.}".format, 0) |
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356 | self.assertRaises(IndexError, "{0[}".format) |
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357 | self.assertRaises(ValueError, "{0[}".format, []) |
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358 | self.assertRaises(KeyError, "{0]}".format) |
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359 | self.assertRaises(ValueError, "{0.[]}".format, 0) |
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360 | self.assertRaises(ValueError, "{0..foo}".format, 0) |
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361 | self.assertRaises(ValueError, "{0[0}".format, 0) |
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362 | self.assertRaises(ValueError, "{0[0:foo}".format, 0) |
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363 | self.assertRaises(KeyError, "{c]}".format) |
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364 | self.assertRaises(ValueError, "{{ {{{0}}".format, 0) |
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365 | self.assertRaises(ValueError, "{0}}".format, 0) |
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366 | self.assertRaises(KeyError, "{foo}".format, bar=3) |
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367 | self.assertRaises(ValueError, "{0!x}".format, 3) |
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368 | self.assertRaises(ValueError, "{0!}".format, 0) |
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369 | self.assertRaises(ValueError, "{0!rs}".format, 0) |
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370 | self.assertRaises(ValueError, "{!}".format) |
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371 | self.assertRaises(IndexError, "{:}".format) |
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372 | self.assertRaises(IndexError, "{:s}".format) |
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373 | self.assertRaises(IndexError, "{}".format) |
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374 | |
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375 | # issue 6089 |
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376 | self.assertRaises(ValueError, "{0[0]x}".format, [None]) |
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377 | self.assertRaises(ValueError, "{0[0](10)}".format, [None]) |
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378 | |
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379 | # can't have a replacement on the field name portion |
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380 | self.assertRaises(TypeError, '{0[{1}]}'.format, 'abcdefg', 4) |
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381 | |
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382 | # exceed maximum recursion depth |
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383 | self.assertRaises(ValueError, "{0:{1:{2}}}".format, 'abc', 's', '') |
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384 | self.assertRaises(ValueError, "{0:{1:{2:{3:{4:{5:{6}}}}}}}".format, |
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385 | 0, 1, 2, 3, 4, 5, 6, 7) |
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386 | |
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387 | # string format spec errors |
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388 | self.assertRaises(ValueError, "{0:-s}".format, '') |
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389 | self.assertRaises(ValueError, format, "", "-") |
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390 | self.assertRaises(ValueError, "{0:=s}".format, '') |
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391 | |
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392 | def test_format_huge_precision(self): |
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393 | format_string = ".{}f".format(sys.maxsize + 1) |
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394 | with self.assertRaises(ValueError): |
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395 | result = format(2.34, format_string) |
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396 | |
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397 | def test_format_huge_width(self): |
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398 | format_string = "{}f".format(sys.maxsize + 1) |
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399 | with self.assertRaises(ValueError): |
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400 | result = format(2.34, format_string) |
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401 | |
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402 | def test_format_huge_item_number(self): |
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403 | format_string = "{{{}:.6f}}".format(sys.maxsize + 1) |
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404 | with self.assertRaises(ValueError): |
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405 | result = format_string.format(2.34) |
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406 | |
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407 | def test_format_auto_numbering(self): |
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408 | class C: |
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409 | def __init__(self, x=100): |
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410 | self._x = x |
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411 | def __format__(self, spec): |
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412 | return spec |
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413 | |
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414 | self.assertEqual('{}'.format(10), '10') |
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415 | self.assertEqual('{:5}'.format('s'), 's ') |
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416 | self.assertEqual('{!r}'.format('s'), "'s'") |
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417 | self.assertEqual('{._x}'.format(C(10)), '10') |
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418 | self.assertEqual('{[1]}'.format([1, 2]), '2') |
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419 | self.assertEqual('{[a]}'.format({'a':4, 'b':2}), '4') |
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420 | self.assertEqual('a{}b{}c'.format(0, 1), 'a0b1c') |
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421 | |
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422 | self.assertEqual('a{:{}}b'.format('x', '^10'), 'a x b') |
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423 | self.assertEqual('a{:{}x}b'.format(20, '#'), 'a0x14b') |
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424 | |
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425 | # can't mix and match numbering and auto-numbering |
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426 | self.assertRaises(ValueError, '{}{1}'.format, 1, 2) |
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427 | self.assertRaises(ValueError, '{1}{}'.format, 1, 2) |
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428 | self.assertRaises(ValueError, '{:{1}}'.format, 1, 2) |
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429 | self.assertRaises(ValueError, '{0:{}}'.format, 1, 2) |
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430 | |
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431 | # can mix and match auto-numbering and named |
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432 | self.assertEqual('{f}{}'.format(4, f='test'), 'test4') |
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433 | self.assertEqual('{}{f}'.format(4, f='test'), '4test') |
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434 | self.assertEqual('{:{f}}{g}{}'.format(1, 3, g='g', f=2), ' 1g3') |
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435 | self.assertEqual('{f:{}}{}{g}'.format(2, 4, f=1, g='g'), ' 14g') |
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436 | |
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437 | def test_format_c_overflow(self): |
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438 | # issue #7267 |
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439 | self.assertRaises(OverflowError, '{0:c}'.format, -1) |
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440 | self.assertRaises(OverflowError, '{0:c}'.format, 256) |
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441 | |
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442 | def test_buffer_is_readonly(self): |
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443 | self.assertRaises(TypeError, sys.stdin.readinto, b"") |
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444 | |
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445 | def test_encode_and_decode_kwargs(self): |
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446 | self.assertEqual('abcde'.encode('ascii', 'replace'), |
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447 | 'abcde'.encode('ascii', errors='replace')) |
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448 | self.assertEqual('abcde'.encode('ascii', 'ignore'), |
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449 | 'abcde'.encode(encoding='ascii', errors='ignore')) |
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450 | self.assertEqual('Andr\202 x'.decode('ascii', 'ignore'), |
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451 | 'Andr\202 x'.decode('ascii', errors='ignore')) |
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452 | self.assertEqual('Andr\202 x'.decode('ascii', 'replace'), |
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453 | 'Andr\202 x'.decode(encoding='ascii', errors='replace')) |
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454 | |
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455 | def test_startswith_endswith_errors(self): |
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456 | with self.assertRaises(UnicodeDecodeError): |
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457 | '\xff'.startswith(u'x') |
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458 | with self.assertRaises(UnicodeDecodeError): |
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459 | '\xff'.endswith(u'x') |
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460 | for meth in ('foo'.startswith, 'foo'.endswith): |
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461 | with self.assertRaises(TypeError) as cm: |
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462 | meth(['f']) |
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463 | exc = str(cm.exception) |
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464 | self.assertIn('unicode', exc) |
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465 | self.assertIn('str', exc) |
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466 | self.assertIn('tuple', exc) |
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467 | |
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468 | def test_main(): |
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469 | test_support.run_unittest(StrTest) |
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470 | |
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471 | if __name__ == "__main__": |
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472 | test_main() |
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