Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/psutil/_compat.py @ 2:6af9afd405e9 draft

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"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
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1 # Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
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2 # Use of this source code is governed by a BSD-style license that can be
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3 # found in the LICENSE file.
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4
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5 """Module which provides compatibility with older Python versions."""
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6
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7 import collections
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8 import errno
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9 import functools
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10 import os
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11 import sys
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12
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13 __all__ = ["PY3", "long", "xrange", "unicode", "basestring", "u", "b",
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14 "lru_cache", "which", "get_terminal_size",
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15 "FileNotFoundError", "PermissionError", "ProcessLookupError",
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16 "InterruptedError", "ChildProcessError", "FileExistsError"]
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17
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18 PY3 = sys.version_info[0] == 3
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19
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20 if PY3:
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21 long = int
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22 xrange = range
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23 unicode = str
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24 basestring = str
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25
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26 def u(s):
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27 return s
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28
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29 def b(s):
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30 return s.encode("latin-1")
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31 else:
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32 long = long
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33 xrange = xrange
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34 unicode = unicode
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35 basestring = basestring
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36
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37 def u(s):
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38 return unicode(s, "unicode_escape")
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39
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40 def b(s):
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41 return s
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42
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43
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44 # --- exceptions
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45
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46
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47 if PY3:
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48 FileNotFoundError = FileNotFoundError # NOQA
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49 PermissionError = PermissionError # NOQA
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50 ProcessLookupError = ProcessLookupError # NOQA
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51 InterruptedError = InterruptedError # NOQA
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52 ChildProcessError = ChildProcessError # NOQA
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53 FileExistsError = FileExistsError # NOQA
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54 else:
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55 # https://github.com/PythonCharmers/python-future/blob/exceptions/
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56 # src/future/types/exceptions/pep3151.py
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57 import platform
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58
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59 _singleton = object()
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60
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61 def instance_checking_exception(base_exception=Exception):
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62 def wrapped(instance_checker):
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63 class TemporaryClass(base_exception):
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64
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65 def __init__(self, *args, **kwargs):
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66 if len(args) == 1 and isinstance(args[0], TemporaryClass):
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67 unwrap_me = args[0]
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68 for attr in dir(unwrap_me):
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69 if not attr.startswith('__'):
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70 setattr(self, attr, getattr(unwrap_me, attr))
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71 else:
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72 super(TemporaryClass, self).__init__(*args, **kwargs)
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73
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74 class __metaclass__(type):
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75 def __instancecheck__(cls, inst):
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76 return instance_checker(inst)
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77
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78 def __subclasscheck__(cls, classinfo):
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79 value = sys.exc_info()[1]
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80 return isinstance(value, cls)
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81
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82 TemporaryClass.__name__ = instance_checker.__name__
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83 TemporaryClass.__doc__ = instance_checker.__doc__
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84 return TemporaryClass
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85
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86 return wrapped
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87
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88 @instance_checking_exception(EnvironmentError)
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89 def FileNotFoundError(inst):
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90 return getattr(inst, 'errno', _singleton) == errno.ENOENT
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91
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92 @instance_checking_exception(EnvironmentError)
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93 def ProcessLookupError(inst):
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94 return getattr(inst, 'errno', _singleton) == errno.ESRCH
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95
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96 @instance_checking_exception(EnvironmentError)
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97 def PermissionError(inst):
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98 return getattr(inst, 'errno', _singleton) in (
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99 errno.EACCES, errno.EPERM)
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100
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101 @instance_checking_exception(EnvironmentError)
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102 def InterruptedError(inst):
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103 return getattr(inst, 'errno', _singleton) == errno.EINTR
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104
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105 @instance_checking_exception(EnvironmentError)
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106 def ChildProcessError(inst):
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107 return getattr(inst, 'errno', _singleton) == errno.ECHILD
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108
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109 @instance_checking_exception(EnvironmentError)
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110 def FileExistsError(inst):
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111 return getattr(inst, 'errno', _singleton) == errno.EEXIST
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112
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113 if platform.python_implementation() != "CPython":
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114 try:
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115 raise OSError(errno.EEXIST, "perm")
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116 except FileExistsError:
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117 pass
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118 except OSError:
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119 raise RuntimeError(
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120 "broken / incompatible Python implementation, see: "
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121 "https://github.com/giampaolo/psutil/issues/1659")
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122
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123
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124 # --- stdlib additions
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125
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126
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127 # py 3.2 functools.lru_cache
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128 # Taken from: http://code.activestate.com/recipes/578078
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129 # Credit: Raymond Hettinger
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130 try:
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diff changeset
131 from functools import lru_cache
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diff changeset
132 except ImportError:
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133 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
134 from threading import RLock
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diff changeset
135 except ImportError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
136 from dummy_threading import RLock
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137
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138 _CacheInfo = collections.namedtuple(
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139 "CacheInfo", ["hits", "misses", "maxsize", "currsize"])
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140
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141 class _HashedSeq(list):
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142 __slots__ = 'hashvalue'
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143
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144 def __init__(self, tup, hash=hash):
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145 self[:] = tup
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146 self.hashvalue = hash(tup)
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147
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148 def __hash__(self):
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149 return self.hashvalue
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150
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151 def _make_key(args, kwds, typed,
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152 kwd_mark=(object(), ),
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153 fasttypes=set((int, str, frozenset, type(None))),
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154 sorted=sorted, tuple=tuple, type=type, len=len):
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155 key = args
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156 if kwds:
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157 sorted_items = sorted(kwds.items())
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158 key += kwd_mark
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159 for item in sorted_items:
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160 key += item
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161 if typed:
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162 key += tuple(type(v) for v in args)
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163 if kwds:
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164 key += tuple(type(v) for k, v in sorted_items)
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165 elif len(key) == 1 and type(key[0]) in fasttypes:
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166 return key[0]
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167 return _HashedSeq(key)
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168
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169 def lru_cache(maxsize=100, typed=False):
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170 """Least-recently-used cache decorator, see:
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171 http://docs.python.org/3/library/functools.html#functools.lru_cache
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172 """
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173 def decorating_function(user_function):
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174 cache = dict()
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175 stats = [0, 0]
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176 HITS, MISSES = 0, 1
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177 make_key = _make_key
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178 cache_get = cache.get
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179 _len = len
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180 lock = RLock()
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181 root = []
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182 root[:] = [root, root, None, None]
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183 nonlocal_root = [root]
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184 PREV, NEXT, KEY, RESULT = 0, 1, 2, 3
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185 if maxsize == 0:
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186 def wrapper(*args, **kwds):
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187 result = user_function(*args, **kwds)
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188 stats[MISSES] += 1
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189 return result
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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190 elif maxsize is None:
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191 def wrapper(*args, **kwds):
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192 key = make_key(args, kwds, typed)
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193 result = cache_get(key, root)
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194 if result is not root:
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195 stats[HITS] += 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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196 return result
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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197 result = user_function(*args, **kwds)
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198 cache[key] = result
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199 stats[MISSES] += 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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200 return result
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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201 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
202 def wrapper(*args, **kwds):
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203 if kwds or typed:
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204 key = make_key(args, kwds, typed)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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205 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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206 key = args
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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207 lock.acquire()
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208 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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209 link = cache_get(key)
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210 if link is not None:
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211 root, = nonlocal_root
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212 link_prev, link_next, key, result = link
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213 link_prev[NEXT] = link_next
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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214 link_next[PREV] = link_prev
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215 last = root[PREV]
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216 last[NEXT] = root[PREV] = link
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217 link[PREV] = last
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218 link[NEXT] = root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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219 stats[HITS] += 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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220 return result
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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221 finally:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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222 lock.release()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
223 result = user_function(*args, **kwds)
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224 lock.acquire()
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diff changeset
225 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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226 root, = nonlocal_root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
227 if key in cache:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
228 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
229 elif _len(cache) >= maxsize:
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230 oldroot = root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
231 oldroot[KEY] = key
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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232 oldroot[RESULT] = result
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
233 root = nonlocal_root[0] = oldroot[NEXT]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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234 oldkey = root[KEY]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
235 root[KEY] = root[RESULT] = None
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
236 del cache[oldkey]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
237 cache[key] = oldroot
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
238 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
239 last = root[PREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
240 link = [last, root, key, result]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
241 last[NEXT] = root[PREV] = cache[key] = link
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
242 stats[MISSES] += 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
243 finally:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
244 lock.release()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
245 return result
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
246
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
247 def cache_info():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
248 """Report cache statistics"""
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
249 lock.acquire()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
250 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
251 return _CacheInfo(stats[HITS], stats[MISSES], maxsize,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
252 len(cache))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
253 finally:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
254 lock.release()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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diff changeset
255
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
256 def cache_clear():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
257 """Clear the cache and cache statistics"""
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
258 lock.acquire()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
259 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
260 cache.clear()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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261 root = nonlocal_root[0]
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262 root[:] = [root, root, None, None]
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263 stats[:] = [0, 0]
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264 finally:
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265 lock.release()
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266
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267 wrapper.__wrapped__ = user_function
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268 wrapper.cache_info = cache_info
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269 wrapper.cache_clear = cache_clear
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270 return functools.update_wrapper(wrapper, user_function)
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271
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272 return decorating_function
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273
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274
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275 # python 3.3
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276 try:
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277 from shutil import which
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278 except ImportError:
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279 def which(cmd, mode=os.F_OK | os.X_OK, path=None):
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280 """Given a command, mode, and a PATH string, return the path which
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281 conforms to the given mode on the PATH, or None if there is no such
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282 file.
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283
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284 `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
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285 of os.environ.get("PATH"), or can be overridden with a custom search
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286 path.
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287 """
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288 def _access_check(fn, mode):
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289 return (os.path.exists(fn) and os.access(fn, mode) and
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290 not os.path.isdir(fn))
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291
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292 if os.path.dirname(cmd):
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293 if _access_check(cmd, mode):
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294 return cmd
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295 return None
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296
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297 if path is None:
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298 path = os.environ.get("PATH", os.defpath)
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299 if not path:
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300 return None
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301 path = path.split(os.pathsep)
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302
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303 if sys.platform == "win32":
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304 if os.curdir not in path:
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305 path.insert(0, os.curdir)
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306
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307 pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
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308 if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
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309 files = [cmd]
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310 else:
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311 files = [cmd + ext for ext in pathext]
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312 else:
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313 files = [cmd]
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314
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315 seen = set()
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316 for dir in path:
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317 normdir = os.path.normcase(dir)
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318 if normdir not in seen:
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319 seen.add(normdir)
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320 for thefile in files:
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321 name = os.path.join(dir, thefile)
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322 if _access_check(name, mode):
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323 return name
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324 return None
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325
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326
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327 # python 3.3
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328 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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329 from shutil import get_terminal_size
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330 except ImportError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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331 def get_terminal_size(fallback=(80, 24)):
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332 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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333 import fcntl
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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334 import termios
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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335 import struct
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336 except ImportError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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337 return fallback
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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338 else:
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339 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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340 # This should work on Linux.
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341 res = struct.unpack(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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342 'hh', fcntl.ioctl(1, termios.TIOCGWINSZ, '1234'))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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343 return (res[1], res[0])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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344 except Exception:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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345 return fallback