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annotate planemo/lib/python3.7/site-packages/pip/_internal/utils/logging.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 from __future__ import absolute_import
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2
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3 import contextlib
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4 import errno
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5 import logging
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6 import logging.handlers
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7 import os
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8 import sys
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9 from logging import Filter
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10
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11 from pip._vendor.six import PY2
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12
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13 from pip._internal.utils.compat import WINDOWS
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14 from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX
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15 from pip._internal.utils.misc import ensure_dir, subprocess_logger
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16
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17 try:
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18 import threading
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19 except ImportError:
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20 import dummy_threading as threading # type: ignore
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21
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22
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23 try:
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24 # Use "import as" and set colorama in the else clause to avoid mypy
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25 # errors and get the following correct revealed type for colorama:
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26 # `Union[_importlib_modulespec.ModuleType, None]`
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27 # Otherwise, we get an error like the following in the except block:
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28 # > Incompatible types in assignment (expression has type "None",
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29 # variable has type Module)
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30 # TODO: eliminate the need to use "import as" once mypy addresses some
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31 # of its issues with conditional imports. Here is an umbrella issue:
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32 # https://github.com/python/mypy/issues/1297
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33 from pip._vendor import colorama as _colorama
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34 # Lots of different errors can come from this, including SystemError and
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35 # ImportError.
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36 except Exception:
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37 colorama = None
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38 else:
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39 # Import Fore explicitly rather than accessing below as colorama.Fore
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40 # to avoid the following error running mypy:
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41 # > Module has no attribute "Fore"
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42 # TODO: eliminate the need to import Fore once mypy addresses some of its
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43 # issues with conditional imports. This particular case could be an
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44 # instance of the following issue (but also see the umbrella issue above):
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45 # https://github.com/python/mypy/issues/3500
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46 from pip._vendor.colorama import Fore
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47
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48 colorama = _colorama
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49
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50
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51 _log_state = threading.local()
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52 _log_state.indentation = 0
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53
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54
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55 class BrokenStdoutLoggingError(Exception):
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56 """
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57 Raised if BrokenPipeError occurs for the stdout stream while logging.
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58 """
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59 pass
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60
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61
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62 # BrokenPipeError does not exist in Python 2 and, in addition, manifests
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63 # differently in Windows and non-Windows.
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64 if WINDOWS:
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65 # In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
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66 # https://bugs.python.org/issue19612
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67 # https://bugs.python.org/issue30418
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68 if PY2:
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69 def _is_broken_pipe_error(exc_class, exc):
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70 """See the docstring for non-Windows Python 3 below."""
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71 return (exc_class is IOError and
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72 exc.errno in (errno.EINVAL, errno.EPIPE))
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73 else:
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74 # In Windows, a broken pipe IOError became OSError in Python 3.
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75 def _is_broken_pipe_error(exc_class, exc):
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76 """See the docstring for non-Windows Python 3 below."""
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77 return ((exc_class is BrokenPipeError) or # noqa: F821
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78 (exc_class is OSError and
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79 exc.errno in (errno.EINVAL, errno.EPIPE)))
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80 elif PY2:
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81 def _is_broken_pipe_error(exc_class, exc):
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82 """See the docstring for non-Windows Python 3 below."""
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83 return (exc_class is IOError and exc.errno == errno.EPIPE)
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84 else:
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85 # Then we are in the non-Windows Python 3 case.
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86 def _is_broken_pipe_error(exc_class, exc):
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87 """
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88 Return whether an exception is a broken pipe error.
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89
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90 Args:
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91 exc_class: an exception class.
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92 exc: an exception instance.
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93 """
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94 return (exc_class is BrokenPipeError) # noqa: F821
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95
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96
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97 @contextlib.contextmanager
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98 def indent_log(num=2):
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99 """
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100 A context manager which will cause the log output to be indented for any
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101 log messages emitted inside it.
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102 """
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103 _log_state.indentation += num
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104 try:
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105 yield
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106 finally:
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107 _log_state.indentation -= num
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108
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109
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110 def get_indentation():
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111 return getattr(_log_state, 'indentation', 0)
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112
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113
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114 class IndentingFormatter(logging.Formatter):
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115
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116 def __init__(self, *args, **kwargs):
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117 """
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118 A logging.Formatter that obeys the indent_log() context manager.
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119
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120 :param add_timestamp: A bool indicating output lines should be prefixed
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121 with their record's timestamp.
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122 """
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123 self.add_timestamp = kwargs.pop("add_timestamp", False)
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124 super(IndentingFormatter, self).__init__(*args, **kwargs)
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125
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126 def get_message_start(self, formatted, levelno):
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127 """
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128 Return the start of the formatted log message (not counting the
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129 prefix to add to each line).
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130 """
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131 if levelno < logging.WARNING:
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132 return ''
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133 if formatted.startswith(DEPRECATION_MSG_PREFIX):
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134 # Then the message already has a prefix. We don't want it to
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135 # look like "WARNING: DEPRECATION: ...."
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136 return ''
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137 if levelno < logging.ERROR:
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138 return 'WARNING: '
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139
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140 return 'ERROR: '
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141
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142 def format(self, record):
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143 """
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144 Calls the standard formatter, but will indent all of the log message
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145 lines by our current indentation level.
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146 """
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147 formatted = super(IndentingFormatter, self).format(record)
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148 message_start = self.get_message_start(formatted, record.levelno)
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149 formatted = message_start + formatted
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150
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151 prefix = ''
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152 if self.add_timestamp:
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153 # TODO: Use Formatter.default_time_format after dropping PY2.
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154 t = self.formatTime(record, "%Y-%m-%dT%H:%M:%S")
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155 prefix = '%s,%03d ' % (t, record.msecs)
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156 prefix += " " * get_indentation()
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157 formatted = "".join([
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158 prefix + line
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159 for line in formatted.splitlines(True)
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160 ])
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161 return formatted
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162
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163
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164 def _color_wrap(*colors):
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165 def wrapped(inp):
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166 return "".join(list(colors) + [inp, colorama.Style.RESET_ALL])
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167 return wrapped
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168
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169
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170 class ColorizedStreamHandler(logging.StreamHandler):
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171
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172 # Don't build up a list of colors if we don't have colorama
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173 if colorama:
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174 COLORS = [
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175 # This needs to be in order from highest logging level to lowest.
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176 (logging.ERROR, _color_wrap(Fore.RED)),
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177 (logging.WARNING, _color_wrap(Fore.YELLOW)),
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178 ]
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179 else:
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180 COLORS = []
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181
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182 def __init__(self, stream=None, no_color=None):
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183 logging.StreamHandler.__init__(self, stream)
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184 self._no_color = no_color
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185
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186 if WINDOWS and colorama:
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187 self.stream = colorama.AnsiToWin32(self.stream)
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188
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189 def _using_stdout(self):
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190 """
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191 Return whether the handler is using sys.stdout.
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192 """
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193 if WINDOWS and colorama:
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194 # Then self.stream is an AnsiToWin32 object.
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195 return self.stream.wrapped is sys.stdout
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196
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197 return self.stream is sys.stdout
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198
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199 def should_color(self):
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200 # Don't colorize things if we do not have colorama or if told not to
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201 if not colorama or self._no_color:
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202 return False
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203
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204 real_stream = (
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205 self.stream if not isinstance(self.stream, colorama.AnsiToWin32)
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206 else self.stream.wrapped
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207 )
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208
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209 # If the stream is a tty we should color it
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210 if hasattr(real_stream, "isatty") and real_stream.isatty():
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211 return True
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212
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213 # If we have an ANSI term we should color it
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214 if os.environ.get("TERM") == "ANSI":
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215 return True
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216
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217 # If anything else we should not color it
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218 return False
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219
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220 def format(self, record):
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221 msg = logging.StreamHandler.format(self, record)
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222
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223 if self.should_color():
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224 for level, color in self.COLORS:
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225 if record.levelno >= level:
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226 msg = color(msg)
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227 break
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228
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229 return msg
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230
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231 # The logging module says handleError() can be customized.
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232 def handleError(self, record):
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233 exc_class, exc = sys.exc_info()[:2]
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234 # If a broken pipe occurred while calling write() or flush() on the
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235 # stdout stream in logging's Handler.emit(), then raise our special
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236 # exception so we can handle it in main() instead of logging the
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237 # broken pipe error and continuing.
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238 if (exc_class and self._using_stdout() and
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239 _is_broken_pipe_error(exc_class, exc)):
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240 raise BrokenStdoutLoggingError()
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241
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242 return super(ColorizedStreamHandler, self).handleError(record)
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243
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244
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245 class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
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246
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247 def _open(self):
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248 ensure_dir(os.path.dirname(self.baseFilename))
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249 return logging.handlers.RotatingFileHandler._open(self)
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250
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251
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252 class MaxLevelFilter(Filter):
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253
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254 def __init__(self, level):
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255 self.level = level
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256
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257 def filter(self, record):
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258 return record.levelno < self.level
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259
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260
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261 class ExcludeLoggerFilter(Filter):
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262
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263 """
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264 A logging Filter that excludes records from a logger (or its children).
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265 """
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266
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267 def filter(self, record):
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268 # The base Filter class allows only records from a logger (or its
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269 # children).
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270 return not super(ExcludeLoggerFilter, self).filter(record)
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271
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272
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273 def setup_logging(verbosity, no_color, user_log_file):
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274 """Configures and sets up all of the logging
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275
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276 Returns the requested logging level, as its integer value.
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277 """
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278
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279 # Determine the level to be logging at.
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280 if verbosity >= 1:
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281 level = "DEBUG"
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282 elif verbosity == -1:
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283 level = "WARNING"
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284 elif verbosity == -2:
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285 level = "ERROR"
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286 elif verbosity <= -3:
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287 level = "CRITICAL"
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288 else:
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289 level = "INFO"
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290
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291 level_number = getattr(logging, level)
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292
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293 # The "root" logger should match the "console" level *unless* we also need
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294 # to log to a user log file.
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295 include_user_log = user_log_file is not None
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296 if include_user_log:
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297 additional_log_file = user_log_file
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298 root_level = "DEBUG"
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299 else:
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300 additional_log_file = "/dev/null"
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301 root_level = level
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302
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303 # Disable any logging besides WARNING unless we have DEBUG level logging
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304 # enabled for vendored libraries.
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305 vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
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306
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307 # Shorthands for clarity
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308 log_streams = {
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309 "stdout": "ext://sys.stdout",
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310 "stderr": "ext://sys.stderr",
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311 }
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312 handler_classes = {
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313 "stream": "pip._internal.utils.logging.ColorizedStreamHandler",
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314 "file": "pip._internal.utils.logging.BetterRotatingFileHandler",
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315 }
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316 handlers = ["console", "console_errors", "console_subprocess"] + (
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317 ["user_log"] if include_user_log else []
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318 )
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319
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320 logging.config.dictConfig({
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321 "version": 1,
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322 "disable_existing_loggers": False,
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323 "filters": {
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324 "exclude_warnings": {
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325 "()": "pip._internal.utils.logging.MaxLevelFilter",
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326 "level": logging.WARNING,
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327 },
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328 "restrict_to_subprocess": {
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329 "()": "logging.Filter",
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330 "name": subprocess_logger.name,
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331 },
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332 "exclude_subprocess": {
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333 "()": "pip._internal.utils.logging.ExcludeLoggerFilter",
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334 "name": subprocess_logger.name,
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335 },
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336 },
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337 "formatters": {
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338 "indent": {
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339 "()": IndentingFormatter,
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340 "format": "%(message)s",
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341 },
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342 "indent_with_timestamp": {
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343 "()": IndentingFormatter,
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344 "format": "%(message)s",
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345 "add_timestamp": True,
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346 },
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347 },
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348 "handlers": {
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349 "console": {
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350 "level": level,
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351 "class": handler_classes["stream"],
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352 "no_color": no_color,
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353 "stream": log_streams["stdout"],
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354 "filters": ["exclude_subprocess", "exclude_warnings"],
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355 "formatter": "indent",
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356 },
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357 "console_errors": {
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358 "level": "WARNING",
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359 "class": handler_classes["stream"],
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360 "no_color": no_color,
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361 "stream": log_streams["stderr"],
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362 "filters": ["exclude_subprocess"],
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363 "formatter": "indent",
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364 },
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365 # A handler responsible for logging to the console messages
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366 # from the "subprocessor" logger.
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367 "console_subprocess": {
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368 "level": level,
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369 "class": handler_classes["stream"],
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370 "no_color": no_color,
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371 "stream": log_streams["stderr"],
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372 "filters": ["restrict_to_subprocess"],
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373 "formatter": "indent",
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374 },
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375 "user_log": {
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376 "level": "DEBUG",
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377 "class": handler_classes["file"],
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378 "filename": additional_log_file,
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379 "delay": True,
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380 "formatter": "indent_with_timestamp",
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381 },
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382 },
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383 "root": {
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384 "level": root_level,
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385 "handlers": handlers,
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386 },
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387 "loggers": {
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388 "pip._vendor": {
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389 "level": vendored_log_level
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390 }
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391 },
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
392 })
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
393
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
394 return level_number