Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/docutils/utils/error_reporting.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 #!/usr/bin/env python |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 # :Id: $Id: error_reporting.py 8367 2019-08-27 12:09:56Z milde $ |
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5 # :Copyright: © 2011 Günter Milde. |
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6 # :License: Released under the terms of the `2-Clause BSD license`_, in short: |
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7 # |
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8 # Copying and distribution of this file, with or without modification, |
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9 # are permitted in any medium without royalty provided the copyright |
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10 # notice and this notice are preserved. |
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11 # This file is offered as-is, without any warranty. |
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12 # |
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13 # .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause |
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14 |
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15 """ |
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16 Error reporting should be safe from encoding/decoding errors. |
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17 However, implicit conversions of strings and exceptions like |
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18 |
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19 >>> u'%s world: %s' % ('H\xe4llo', Exception(u'H\xe4llo') |
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20 |
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21 fail in some Python versions: |
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22 |
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23 * In Python <= 2.6, ``unicode(<exception instance>)`` uses |
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24 `__str__` and fails with non-ASCII chars in`unicode` arguments. |
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25 (work around http://bugs.python.org/issue2517): |
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26 |
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27 * In Python 2, unicode(<exception instance>) fails, with non-ASCII |
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28 chars in arguments. (Use case: in some locales, the errstr |
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29 argument of IOError contains non-ASCII chars.) |
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30 |
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31 * In Python 2, str(<exception instance>) fails, with non-ASCII chars |
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32 in `unicode` arguments. |
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33 |
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34 The `SafeString`, `ErrorString` and `ErrorOutput` classes handle |
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35 common exceptions. |
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36 """ |
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37 |
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38 import codecs |
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39 import sys |
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40 |
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41 # Guess the locale's encoding. |
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42 # If no valid guess can be made, locale_encoding is set to `None`: |
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43 try: |
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44 import locale # module missing in Jython |
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45 except ImportError: |
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46 locale_encoding = None |
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47 else: |
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48 try: |
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49 locale_encoding = locale.getlocale()[1] or locale.getdefaultlocale()[1] |
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50 # locale.getpreferredencoding([do_setlocale=True|False]) |
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51 # has side-effects | might return a wrong guess. |
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52 # (cf. Update 1 in http://stackoverflow.com/questions/4082645/using-python-2-xs-locale-module-to-format-numbers-and-currency) |
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53 except ValueError as error: # OS X may set UTF-8 without language code |
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54 # see http://bugs.python.org/issue18378 |
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55 # and https://sourceforge.net/p/docutils/bugs/298/ |
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56 if "unknown locale: UTF-8" in error.args: |
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57 locale_encoding = "UTF-8" |
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58 else: |
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59 locale_encoding = None |
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60 except: # any other problems determining the locale -> use None |
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61 locale_encoding = None |
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62 try: |
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63 codecs.lookup(locale_encoding or '') # None -> '' |
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64 except LookupError: |
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65 locale_encoding = None |
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66 |
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67 |
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68 if sys.version_info >= (3, 0): |
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69 unicode = str # noqa |
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70 |
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71 |
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72 class SafeString(object): |
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73 """ |
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74 A wrapper providing robust conversion to `str` and `unicode`. |
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75 """ |
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76 |
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77 def __init__(self, data, encoding=None, encoding_errors='backslashreplace', |
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78 decoding_errors='replace'): |
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79 self.data = data |
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80 self.encoding = (encoding or getattr(data, 'encoding', None) or |
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81 locale_encoding or 'ascii') |
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82 self.encoding_errors = encoding_errors |
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83 self.decoding_errors = decoding_errors |
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84 |
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85 |
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86 def __str__(self): |
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87 try: |
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88 return str(self.data) |
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89 except UnicodeEncodeError: |
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90 if isinstance(self.data, Exception): |
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91 args = [str(SafeString(arg, self.encoding, |
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92 self.encoding_errors)) |
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93 for arg in self.data.args] |
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94 return ', '.join(args) |
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95 if isinstance(self.data, unicode): |
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96 if sys.version_info > (3, 0): |
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97 return self.data |
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98 else: |
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99 return self.data.encode(self.encoding, |
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100 self.encoding_errors) |
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101 raise |
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102 |
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103 def __unicode__(self): |
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104 """ |
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105 Return unicode representation of `self.data`. |
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106 |
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107 Try ``unicode(self.data)``, catch `UnicodeError` and |
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108 |
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109 * if `self.data` is an Exception instance, work around |
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110 http://bugs.python.org/issue2517 with an emulation of |
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111 Exception.__unicode__, |
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112 |
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113 * else decode with `self.encoding` and `self.decoding_errors`. |
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114 """ |
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115 try: |
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116 u = unicode(self.data) |
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117 if isinstance(self.data, EnvironmentError): |
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118 u = u.replace(": u'", ": '") # normalize filename quoting |
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119 return u |
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120 except UnicodeError as error: # catch ..Encode.. and ..Decode.. errors |
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121 if isinstance(self.data, EnvironmentError): |
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122 return u"[Errno %s] %s: '%s'" % (self.data.errno, |
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123 SafeString(self.data.strerror, self.encoding, |
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124 self.decoding_errors), |
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125 SafeString(self.data.filename, self.encoding, |
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126 self.decoding_errors)) |
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127 if isinstance(self.data, Exception): |
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128 args = [unicode(SafeString(arg, self.encoding, |
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129 decoding_errors=self.decoding_errors)) |
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130 for arg in self.data.args] |
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131 return u', '.join(args) |
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132 if isinstance(error, UnicodeDecodeError): |
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133 return unicode(self.data, self.encoding, self.decoding_errors) |
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134 raise |
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135 |
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136 class ErrorString(SafeString): |
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137 """ |
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138 Safely report exception type and message. |
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139 """ |
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140 def __str__(self): |
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141 return '%s: %s' % (self.data.__class__.__name__, |
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142 super(ErrorString, self).__str__()) |
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143 |
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144 def __unicode__(self): |
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145 return u'%s: %s' % (self.data.__class__.__name__, |
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146 super(ErrorString, self).__unicode__()) |
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147 |
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148 |
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149 class ErrorOutput(object): |
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150 """ |
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151 Wrapper class for file-like error streams with |
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152 failsave de- and encoding of `str`, `bytes`, `unicode` and |
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153 `Exception` instances. |
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154 """ |
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155 |
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156 def __init__(self, stream=None, encoding=None, |
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157 encoding_errors='backslashreplace', |
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158 decoding_errors='replace'): |
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159 """ |
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160 :Parameters: |
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161 - `stream`: a file-like object, |
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162 a string (path to a file), |
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163 `None` (write to `sys.stderr`, default), or |
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164 evaluating to `False` (write() requests are ignored). |
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165 - `encoding`: `stream` text encoding. Guessed if None. |
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166 - `encoding_errors`: how to treat encoding errors. |
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167 """ |
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168 if stream is None: |
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169 stream = sys.stderr |
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170 elif not(stream): |
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171 stream = False |
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172 # if `stream` is a file name, open it |
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173 elif isinstance(stream, str): |
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174 stream = open(stream, 'w') |
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175 elif isinstance(stream, unicode): |
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176 stream = open(stream.encode(sys.getfilesystemencoding()), 'w') |
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177 |
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178 self.stream = stream |
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179 """Where warning output is sent.""" |
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180 |
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181 self.encoding = (encoding or getattr(stream, 'encoding', None) or |
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182 locale_encoding or 'ascii') |
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183 """The output character encoding.""" |
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184 |
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185 self.encoding_errors = encoding_errors |
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186 """Encoding error handler.""" |
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187 |
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188 self.decoding_errors = decoding_errors |
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189 """Decoding error handler.""" |
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190 |
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191 def write(self, data): |
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192 """ |
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193 Write `data` to self.stream. Ignore, if self.stream is False. |
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194 |
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195 `data` can be a `string`, `unicode`, or `Exception` instance. |
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196 """ |
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197 if self.stream is False: |
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198 return |
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199 if isinstance(data, Exception): |
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200 data = unicode(SafeString(data, self.encoding, |
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201 self.encoding_errors, self.decoding_errors)) |
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202 try: |
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203 self.stream.write(data) |
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204 except UnicodeEncodeError: |
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205 self.stream.write(data.encode(self.encoding, self.encoding_errors)) |
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206 except TypeError: |
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207 if isinstance(data, unicode): # passed stream may expect bytes |
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208 self.stream.write(data.encode(self.encoding, |
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209 self.encoding_errors)) |
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210 return |
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211 if self.stream in (sys.stderr, sys.stdout): |
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212 self.stream.buffer.write(data) # write bytes to raw stream |
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213 else: |
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214 self.stream.write(unicode(data, self.encoding, |
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215 self.decoding_errors)) |
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216 |
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217 def close(self): |
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218 """ |
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219 Close the error-output stream. |
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220 |
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221 Ignored if the stream is` sys.stderr` or `sys.stdout` or has no |
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222 close() method. |
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223 """ |
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224 if self.stream in (sys.stdout, sys.stderr): |
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225 return |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
226 try: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
227 self.stream.close() |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
228 except AttributeError: |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
229 pass |