annotate tests/test-demandimport.py @ 51460:cebd96dee99a

branchcache: move the filename to a class attribute This prepare the introduction of more variant of cache.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sun, 25 Feb 2024 20:40:37 +0100
parents d718eddf01d9
children be227c60a3e0 37f693975cbc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 from mercurial import demandimport
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2
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3 demandimport.enable()
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4
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5 import os
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6 import subprocess
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7 import sys
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8 import types
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9
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10 # Don't import pycompat because it has too many side-effects.
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11 ispy311 = (sys.version_info.major, sys.version_info.minor) >= (3, 11)
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12
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13 # Only run if demandimport is allowed
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14 if subprocess.call(
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15 [os.environ['PYTHON'], '%s/hghave' % os.environ['TESTDIR'], 'demandimport']
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16 ):
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17 sys.exit(80)
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18
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19 # We rely on assert, which gets optimized out.
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20 if sys.flags.optimize:
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21 sys.exit(80)
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22
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23 # The demand importer doesn't work on Python 3.5.
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24 if sys.version_info[0:2] == (3, 5):
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25 sys.exit(80)
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26
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27 from importlib.util import _LazyModule
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28
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29 try:
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30 from importlib.util import _Module as moduletype
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31 except ImportError:
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32 moduletype = types.ModuleType
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33
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34 if os.name != 'nt':
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35 try:
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36 import distutils.msvc9compiler
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37
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38 print(
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39 'distutils.msvc9compiler needs to be an immediate '
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40 'importerror on non-windows platforms'
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41 )
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42 distutils.msvc9compiler
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43 except ImportError:
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44 pass
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45
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46 import re
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47
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48 rsub = re.sub
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49
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50
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51 def f(obj):
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52 l = repr(obj)
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53 l = rsub("0x[0-9a-fA-F]+", "0x?", l)
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54 l = rsub("from '.*'", "from '?'", l)
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55 l = rsub("'<[a-z]*>'", "'<whatever>'", l)
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56 return l
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57
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58
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59 demandimport.disable()
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60 os.environ['HGDEMANDIMPORT'] = 'disable'
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61 # this enable call should not actually enable demandimport!
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62 demandimport.enable()
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63 from mercurial import node
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64
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65 # We use assert instead of a unittest test case because having imports inside
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66 # functions changes behavior of the demand importer.
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67 assert not isinstance(node, _LazyModule)
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68
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69 # now enable it for real
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70 del os.environ['HGDEMANDIMPORT']
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71 demandimport.enable()
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72
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73 # Test access to special attributes through demandmod proxy
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74 assert 'mercurial.error' not in sys.modules
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75 from mercurial import error as errorproxy
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76
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77 assert isinstance(errorproxy, _LazyModule)
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78 assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy)
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79
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80 doc = ' '.join(errorproxy.__doc__.split()[:3])
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81 assert doc == 'Mercurial exceptions. This', doc
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82 assert errorproxy.__name__ == 'mercurial.error', errorproxy.__name__
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83
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84 # __name__ must be accessible via __dict__ so the relative imports can be
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85 # resolved
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86 name = errorproxy.__dict__['__name__']
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87 assert name == 'mercurial.error', name
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88
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89 assert not isinstance(errorproxy, _LazyModule)
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90 assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy)
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91
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92 import os
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93
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94 assert not isinstance(os, _LazyModule)
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95 if ispy311:
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96 assert f(os) == "<module 'os' (frozen)>", f(os)
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97 else:
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98 assert f(os) == "<module 'os' from '?'>", f(os)
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99
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100 assert f(os.system) == '<built-in function system>', f(os.system)
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101 if ispy311:
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102 assert f(os) == "<module 'os' (frozen)>", f(os)
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103 else:
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104 assert f(os) == "<module 'os' from '?'>", f(os)
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105
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106 assert 'mercurial.utils.procutil' not in sys.modules
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107 from mercurial.utils import procutil
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108
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109 assert isinstance(procutil, _LazyModule)
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110 assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f(
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111 procutil
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112 )
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113
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114 assert f(procutil.system) == '<function system at 0x?>', f(procutil.system)
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115 assert procutil.__class__ == moduletype, procutil.__class__
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116 assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f(
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117 procutil
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118 )
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119 assert f(procutil.system) == '<function system at 0x?>', f(procutil.system)
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120
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121 assert 'mercurial.hgweb' not in sys.modules
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122 from mercurial import hgweb
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123
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124 assert isinstance(hgweb, _LazyModule)
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125 assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb)
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126 assert isinstance(hgweb.hgweb_mod, _LazyModule)
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127 assert f(hgweb.hgweb_mod) == "<module 'mercurial.hgweb.hgweb_mod' from '?'>", f(
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128 hgweb.hgweb_mod
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129 )
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130
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131 assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb)
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132
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133 import re as fred
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134
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135 assert not isinstance(fred, _LazyModule)
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136 assert f(fred) == "<module 're' from '?'>"
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137
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138 import re as remod
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139
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140 assert not isinstance(remod, _LazyModule)
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141 assert f(remod) == "<module 're' from '?'>"
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142
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143 import sys as re
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144
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145 assert not isinstance(re, _LazyModule)
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146 assert f(re) == "<module 'sys' (built-in)>"
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147
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148 assert not isinstance(fred, _LazyModule)
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149 assert f(fred) == "<module 're' from '?'>", f(fred)
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150
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151 assert f(fred.sub) == '<function sub at 0x?>', f(fred.sub)
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152
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153 assert not isinstance(fred, _LazyModule)
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154 assert f(fred) == "<module 're' from '?'>", f(fred)
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155
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156 remod.escape # use remod
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157 assert f(remod) == "<module 're' from '?'>", f(remod)
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158
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159 assert not isinstance(re, _LazyModule)
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160 assert f(re) == "<module 'sys' (built-in)>"
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161 assert f(type(re.stderr)) == "<class '_io.TextIOWrapper'>", f(type(re.stderr))
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162 assert f(re) == "<module 'sys' (built-in)>"
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163
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164 assert 'telnetlib' not in sys.modules
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165 import telnetlib
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166
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167 assert isinstance(telnetlib, _LazyModule)
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168 assert f(telnetlib) == "<module 'telnetlib' from '?'>"
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169
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170 try:
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171 from telnetlib import unknownattr
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172
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173 assert False, (
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174 'no demandmod should be created for attribute of non-package '
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175 'module:\ntelnetlib.unknownattr = %s' % f(unknownattr)
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176 )
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177 except ImportError as inst:
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178 assert rsub(r"'", '', str(inst)).startswith(
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179 'cannot import name unknownattr'
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180 )
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181
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182 # Unlike the import statement, __import__() function should not raise
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183 # ImportError even if fromlist has an unknown item
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184 # (see Python/import.c:import_module_level() and ensure_fromlist())
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185 assert 'ftplib' not in sys.modules
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186 zipfileimp = __import__('ftplib', globals(), locals(), ['unknownattr'])
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187 assert f(zipfileimp) == "<module 'ftplib' from '?'>", f(zipfileimp)
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188 assert not hasattr(zipfileimp, 'unknownattr')
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189
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190
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191 # test deactivation for issue6725
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192 del sys.modules['telnetlib']
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193 with demandimport.deactivated():
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194 import telnetlib
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195 assert telnetlib.__loader__ == telnetlib.__spec__.loader
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196 assert telnetlib.__loader__.get_resource_reader