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error_reporting.py

#!/usr/bin/env python3
# :Id: $Id: error_reporting.py 9078 2022-06-17 11:31:40Z milde $
# :Copyright: © 2011 Günter Milde.
# :License: Released under the terms of the `2-Clause BSD license`_, in short:
#
#    Copying and distribution of this file, with or without modification,
#    are permitted in any medium without royalty provided the copyright
#    notice and this notice are preserved.
#    This file is offered as-is, without any warranty.
#
# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause

"""
Deprecated module to handle Exceptions across Python versions.

.. warning::
   This module is deprecated with the end of support for Python 2.7
   and will be removed in Docutils 0.21 or later.

Replacements:
     | SafeString  -> str
     | ErrorString -> docutils.io.error_string()
     | ErrorOutput -> docutils.io.ErrorOutput

Error reporting should be safe from encoding/decoding errors.
However, implicit conversions of strings and exceptions like

>>> u'%s world: %s' % ('H\xe4llo', Exception(u'H\xe4llo'))

fail in some Python versions:

* In Python <= 2.6, ``unicode(<exception instance>)`` uses
  `__str__` and fails with non-ASCII chars in`unicode` arguments.
  (work around http://bugs.python.org/issue2517):

* In Python 2, unicode(<exception instance>) fails, with non-ASCII
  chars in arguments. (Use case: in some locales, the errstr
  argument of IOError contains non-ASCII chars.)

* In Python 2, str(<exception instance>) fails, with non-ASCII chars
  in `unicode` arguments.

The `SafeString`, `ErrorString` and `ErrorOutput` classes handle
common exceptions.
"""

import sys
import warnings

from docutils.io import _locale_encoding as locale_encoding  # noqa

warnings.warn('The `docutils.utils.error_reporting` module is deprecated '
              'and will be removed in Docutils 0.21 or later.\n'
              'Details with help("docutils.utils.error_reporting").',
              DeprecationWarning, stacklevel=2)

if sys.version_info >= (3, 0):
    unicode = str  # noqa

class SafeString:
    """
    A wrapper providing robust conversion to `str` and `unicode`.
    """

def __init__(self, data, encoding=None, encoding_errors='backslashreplace',
                 decoding_errors='replace'):
        self.data = data
        self.encoding = (encoding or getattr(data, 'encoding', None)
                         or locale_encoding or 'ascii')
        self.encoding_errors = encoding_errors
        self.decoding_errors = decoding_errors

def __str__(self):
        try:
            return str(self.data)
        except UnicodeEncodeError:
            if isinstance(self.data, Exception):
                args = [str(SafeString(arg, self.encoding,
                                       self.encoding_errors))
                        for arg in self.data.args]
                return ', '.join(args)
            if isinstance(self.data, unicode):
                if sys.version_info > (3, 0):
                    return self.data
                else:
                    return self.data.encode(self.encoding,
                                            self.encoding_errors)
            raise

def __unicode__(self):
        """
        Return unicode representation of `self.data`.

Try ``unicode(self.data)``, catch `UnicodeError` and

* if `self.data` is an Exception instance, work around
          http://bugs.python.org/issue2517 with an emulation of
          Exception.__unicode__,

* else decode with `self.encoding` and `self.decoding_errors`.
        """
        try:
            u = unicode(self.data)
            if isinstance(self.data, EnvironmentError):
                u = u.replace(": u'", ": '") # normalize filename quoting
            return u
        except UnicodeError as error: # catch ..Encode.. and ..Decode.. errors
            if isinstance(self.data, EnvironmentError):
                return "[Errno %s] %s: '%s'" % (
                    self.data.errno,
                    SafeString(self.data.strerror, self.encoding,
                               self.decoding_errors),
                    SafeString(self.data.filename, self.encoding,
                               self.decoding_errors))
            if isinstance(self.data, Exception):
                args = [unicode(SafeString(
                                    arg, self.encoding,
                                    decoding_errors=self.decoding_errors))
                        for arg in self.data.args]
                return u', '.join(args)
            if isinstance(error, UnicodeDecodeError):
                return unicode(self.data, self.encoding, self.decoding_errors)
            raise

class ErrorString(SafeString):
    """
    Safely report exception type and message.
    """
    def __str__(self):
        return '%s: %s' % (self.data.__class__.__name__,
                           super(ErrorString, self).__str__())

def __unicode__(self):
        return u'%s: %s' % (self.data.__class__.__name__,
                            super(ErrorString, self).__unicode__())

class ErrorOutput:
    """
    Wrapper class for file-like error streams with
    failsafe de- and encoding of `str`, `bytes`, `unicode` and
    `Exception` instances.
    """

def __init__(self, stream=None, encoding=None,
                 encoding_errors='backslashreplace',
                 decoding_errors='replace'):
        """
        :Parameters:
            - `stream`: a file-like object,
                        a string (path to a file),
                        `None` (write to `sys.stderr`, default), or
                        evaluating to `False` (write() requests are ignored).
            - `encoding`: `stream` text encoding. Guessed if None.
            - `encoding_errors`: how to treat encoding errors.
        """
        if stream is None:
            stream = sys.stderr
        elif not stream:
            stream = False
        # if `stream` is a file name, open it
        elif isinstance(stream, str):
            stream = open(stream, 'w')
        elif isinstance(stream, unicode):
            stream = open(stream.encode(sys.getfilesystemencoding()), 'w')

self.stream = stream
        """Where warning output is sent."""

self.encoding = (encoding or getattr(stream, 'encoding', None)
                         or locale_encoding or 'ascii')
        """The output character encoding."""

self.encoding_errors = encoding_errors
        """Encoding error handler."""

self.decoding_errors = decoding_errors
        """Decoding error handler."""

def write(self, data):
        """
        Write `data` to self.stream. Ignore, if self.stream is False.

`data` can be a `string`, `unicode`, or `Exception` instance.
        """
        if self.stream is False:
            return
        if isinstance(data, Exception):
            data = unicode(SafeString(data, self.encoding,
                                      self.encoding_errors,
                                      self.decoding_errors))
        try:
            self.stream.write(data)
        except UnicodeEncodeError:
            self.stream.write(data.encode(self.encoding, self.encoding_errors))
        except TypeError:
            if isinstance(data, unicode): # passed stream may expect bytes
                self.stream.write(data.encode(self.encoding,
                                              self.encoding_errors))
                return
            if self.stream in (sys.stderr, sys.stdout):
                self.stream.buffer.write(data) # write bytes to raw stream
            else:
                self.stream.write(unicode(data, self.encoding,
                                          self.decoding_errors))

def close(self):
        """
        Close the error-output stream.

Ignored if the stream is` sys.stderr` or `sys.stdout` or has no
        close() method.
        """
        if self.stream in (sys.stdout, sys.stderr):
            return
        try:
            self.stream.close()
        except AttributeError:
            pass

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:09
..	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:09
__pycache__	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:09
math	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:09
__init__.py	text/x-script.python	28.69 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
code_analyzer.py	text/x-script.python	4.8 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
error_reporting.py	text/x-script.python	7.92 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
punctuation_chars.py	text/plain	5.61 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
roman.py	text/plain	2.63 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
smartquotes.py	text/x-script.python	38.06 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
urischemes.py	text/plain	6.11 KB	root/root	-rw-r--r--	2024-09-04 06:22:37