FM / chardet

/usr/lib/python2.7/site-packages/chardet/

/usr/lib/python2.7/site-packages/chardet

Name	Size	Mode	Actions
cli/	-	0755	rm
big5freq.py	31254	0644	edit dl rm
big5freq.pyc	54689	0644	edit dl rm
big5freq.pyo	54689	0644	edit dl rm
big5prober.py	1757	0644	edit dl rm
big5prober.pyc	1297	0644	edit dl rm
big5prober.pyo	1297	0644	edit dl rm
chardistribution.py	9411	0644	edit dl rm
chardistribution.pyc	7539	0644	edit dl rm
chardistribution.pyo	7539	0644	edit dl rm
charsetgroupprober.py	3787	0644	edit dl rm
charsetgroupprober.pyc	2777	0644	edit dl rm
charsetgroupprober.pyo	2777	0644	edit dl rm
charsetprober.py	5110	0644	edit dl rm
charsetprober.pyc	4017	0644	edit dl rm
charsetprober.pyo	4017	0644	edit dl rm
codingstatemachine.py	3590	0644	edit dl rm
codingstatemachine.pyc	3264	0644	edit dl rm
codingstatemachine.pyo	3264	0644	edit dl rm
compat.py	1134	0644	edit dl rm
compat.pyc	392	0644	edit dl rm
compat.pyo	392	0644	edit dl rm
cp949prober.py	1855	0644	edit dl rm
cp949prober.pyc	1305	0644	edit dl rm
cp949prober.pyo	1305	0644	edit dl rm
enums.py	1661	0644	edit dl rm
enums.pyc	3033	0644	edit dl rm
enums.pyo	3033	0644	edit dl rm
escprober.py	3950	0644	edit dl rm
escprober.pyc	3135	0644	edit dl rm
escprober.pyo	3135	0644	edit dl rm
escsm.py	10510	0644	edit dl rm
escsm.pyc	8003	0644	edit dl rm
escsm.pyo	8003	0644	edit dl rm
eucjpprober.py	3749	0644	edit dl rm
eucjpprober.pyc	2950	0644	edit dl rm
eucjpprober.pyo	2950	0644	edit dl rm
euckrfreq.py	13546	0644	edit dl rm
euckrfreq.pyc	24075	0644	edit dl rm
euckrfreq.pyo	24075	0644	edit dl rm
euckrprober.py	1748	0644	edit dl rm
euckrprober.pyc	1306	0644	edit dl rm
euckrprober.pyo	1306	0644	edit dl rm
euctwfreq.py	31621	0644	edit dl rm
euctwfreq.pyc	54698	0644	edit dl rm
euctwfreq.pyo	54698	0644	edit dl rm
euctwprober.py	1747	0644	edit dl rm
euctwprober.pyc	1306	0644	edit dl rm
euctwprober.pyo	1306	0644	edit dl rm
gb2312freq.py	20715	0644	edit dl rm
gb2312freq.pyc	38340	0644	edit dl rm
gb2312freq.pyo	38340	0644	edit dl rm
gb2312prober.py	1754	0644	edit dl rm
gb2312prober.pyc	1315	0644	edit dl rm
gb2312prober.pyo	1315	0644	edit dl rm
hebrewprober.py	13838	0644	edit dl rm
hebrewprober.pyc	3682	0644	edit dl rm
hebrewprober.pyo	3682	0644	edit dl rm
jisfreq.py	25777	0644	edit dl rm
jisfreq.pyc	44484	0644	edit dl rm
jisfreq.pyo	44484	0644	edit dl rm
jpcntx.py	19643	0644	edit dl rm
jpcntx.pyc	25162	0644	edit dl rm
jpcntx.pyo	25162	0644	edit dl rm
langbulgarianmodel.py	12839	0644	edit dl rm
langbulgarianmodel.pyc	24952	0644	edit dl rm
langbulgarianmodel.pyo	24952	0644	edit dl rm
langcyrillicmodel.py	17948	0644	edit dl rm
langcyrillicmodel.pyc	30672	0644	edit dl rm
langcyrillicmodel.pyo	30672	0644	edit dl rm
langgreekmodel.py	12688	0644	edit dl rm
langgreekmodel.pyc	24627	0644	edit dl rm
langgreekmodel.pyo	24627	0644	edit dl rm
langhebrewmodel.py	11345	0644	edit dl rm
langhebrewmodel.pyc	23438	0644	edit dl rm
langhebrewmodel.pyo	23438	0644	edit dl rm
langhungarianmodel.py	12592	0644	edit dl rm
langhungarianmodel.pyc	24922	0644	edit dl rm
langhungarianmodel.pyo	24922	0644	edit dl rm
langthaimodel.py	11290	0644	edit dl rm
langthaimodel.pyc	23417	0644	edit dl rm
langthaimodel.pyo	23417	0644	edit dl rm
langturkishmodel.py	11102	0644	edit dl rm
langturkishmodel.pyc	23434	0644	edit dl rm
langturkishmodel.pyo	23434	0644	edit dl rm
latin1prober.py	5370	0644	edit dl rm
latin1prober.pyc	3645	0644	edit dl rm
latin1prober.pyo	3645	0644	edit dl rm
mbcharsetprober.py	3413	0644	edit dl rm
mbcharsetprober.pyc	2699	0644	edit dl rm
mbcharsetprober.pyo	2699	0644	edit dl rm
mbcsgroupprober.py	2012	0644	edit dl rm
mbcsgroupprober.pyc	1300	0644	edit dl rm
mbcsgroupprober.pyo	1300	0644	edit dl rm
mbcssm.py	25481	0644	edit dl rm
mbcssm.pyc	19109	0644	edit dl rm
mbcssm.pyo	19109	0644	edit dl rm
sbcharsetprober.py	5657	0644	edit dl rm
sbcharsetprober.pyc	3578	0644	edit dl rm
sbcharsetprober.pyo	3578	0644	edit dl rm
sbcsgroupprober.py	3546	0644	edit dl rm
sbcsgroupprober.pyc	1893	0644	edit dl rm
sbcsgroupprober.pyo	1893	0644	edit dl rm
sjisprober.py	3774	0644	edit dl rm
sjisprober.pyc	2971	0644	edit dl rm
sjisprober.pyo	2971	0644	edit dl rm
universaldetector.py	12485	0644	edit dl rm
universaldetector.pyc	7049	0644	edit dl rm
universaldetector.pyo	7049	0644	edit dl rm
utf8prober.py	2766	0644	edit dl rm
utf8prober.pyc	2420	0644	edit dl rm
utf8prober.pyo	2420	0644	edit dl rm
version.py	242	0644	edit dl rm
version.pyc	419	0644	edit dl rm
version.pyo	419	0644	edit dl rm
__init__.py	1559	0644	edit dl rm
__init__.pyc	970	0644	edit dl rm
__init__.pyo	970	0644	edit dl rm

Edit: /usr/lib/python2.7/site-packages/chardet/universaldetector.py (12485B)

######################## BEGIN LICENSE BLOCK ########################
# The Original Code is Mozilla Universal charset detector code.
#
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 2001
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#   Mark Pilgrim - port to Python
#   Shy Shalom - original C code
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
# 02110-1301  USA
######################### END LICENSE BLOCK #########################
"""
Module containing the UniversalDetector detector class, which is the primary
class a user of ``chardet`` should use.

:author: Mark Pilgrim (initial port to Python)
:author: Shy Shalom (original C code)
:author: Dan Blanchard (major refactoring for 3.0)
:author: Ian Cordasco
"""

import codecs
import logging
import re

from .charsetgroupprober import CharSetGroupProber
from .enums import InputState, LanguageFilter, ProbingState
from .escprober import EscCharSetProber
from .latin1prober import Latin1Prober
from .mbcsgroupprober import MBCSGroupProber
from .sbcsgroupprober import SBCSGroupProber

class UniversalDetector(object):
    """
    The ``UniversalDetector`` class underlies the ``chardet.detect`` function
    and coordinates all of the different charset probers.

To get a ``dict`` containing an encoding and its confidence, you can simply
    run:

.. code::

u = UniversalDetector()
            u.feed(some_bytes)
            u.close()
            detected = u.result

"""

MINIMUM_THRESHOLD = 0.20
    HIGH_BYTE_DETECTOR = re.compile(b'[\x80-\xFF]')
    ESC_DETECTOR = re.compile(b'(\033|~{)')
    WIN_BYTE_DETECTOR = re.compile(b'[\x80-\x9F]')
    ISO_WIN_MAP = {'iso-8859-1': 'Windows-1252',
                   'iso-8859-2': 'Windows-1250',
                   'iso-8859-5': 'Windows-1251',
                   'iso-8859-6': 'Windows-1256',
                   'iso-8859-7': 'Windows-1253',
                   'iso-8859-8': 'Windows-1255',
                   'iso-8859-9': 'Windows-1254',
                   'iso-8859-13': 'Windows-1257'}

def __init__(self, lang_filter=LanguageFilter.ALL):
        self._esc_charset_prober = None
        self._charset_probers = []
        self.result = None
        self.done = None
        self._got_data = None
        self._input_state = None
        self._last_char = None
        self.lang_filter = lang_filter
        self.logger = logging.getLogger(__name__)
        self._has_win_bytes = None
        self.reset()

def reset(self):
        """
        Reset the UniversalDetector and all of its probers back to their
        initial states.  This is called by ``__init__``, so you only need to
        call this directly in between analyses of different documents.
        """
        self.result = {'encoding': None, 'confidence': 0.0, 'language': None}
        self.done = False
        self._got_data = False
        self._has_win_bytes = False
        self._input_state = InputState.PURE_ASCII
        self._last_char = b''
        if self._esc_charset_prober:
            self._esc_charset_prober.reset()
        for prober in self._charset_probers:
            prober.reset()

def feed(self, byte_str):
        """
        Takes a chunk of a document and feeds it through all of the relevant
        charset probers.

After calling ``feed``, you can check the value of the ``done``
        attribute to see if you need to continue feeding the
        ``UniversalDetector`` more data, or if it has made a prediction
        (in the ``result`` attribute).

.. note::
           You should always call ``close`` when you're done feeding in your
           document if ``done`` is not already ``True``.
        """
        if self.done:
            return

if not len(byte_str):
            return

if not isinstance(byte_str, bytearray):
            byte_str = bytearray(byte_str)

# First check for known BOMs, since these are guaranteed to be correct
        if not self._got_data:
            # If the data starts with BOM, we know it is UTF
            if byte_str.startswith(codecs.BOM_UTF8):
                # EF BB BF  UTF-8 with BOM
                self.result = {'encoding': "UTF-8-SIG",
                               'confidence': 1.0,
                               'language': ''}
            elif byte_str.startswith((codecs.BOM_UTF32_LE,
                                      codecs.BOM_UTF32_BE)):
                # FF FE 00 00  UTF-32, little-endian BOM
                # 00 00 FE FF  UTF-32, big-endian BOM
                self.result = {'encoding': "UTF-32",
                               'confidence': 1.0,
                               'language': ''}
            elif byte_str.startswith(b'\xFE\xFF\x00\x00'):
                # FE FF 00 00  UCS-4, unusual octet order BOM (3412)
                self.result = {'encoding': "X-ISO-10646-UCS-4-3412",
                               'confidence': 1.0,
                               'language': ''}
            elif byte_str.startswith(b'\x00\x00\xFF\xFE'):
                # 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
                self.result = {'encoding': "X-ISO-10646-UCS-4-2143",
                               'confidence': 1.0,
                               'language': ''}
            elif byte_str.startswith((codecs.BOM_LE, codecs.BOM_BE)):
                # FF FE  UTF-16, little endian BOM
                # FE FF  UTF-16, big endian BOM
                self.result = {'encoding': "UTF-16",
                               'confidence': 1.0,
                               'language': ''}

self._got_data = True
            if self.result['encoding'] is not None:
                self.done = True
                return

# If none of those matched and we've only see ASCII so far, check
        # for high bytes and escape sequences
        if self._input_state == InputState.PURE_ASCII:
            if self.HIGH_BYTE_DETECTOR.search(byte_str):
                self._input_state = InputState.HIGH_BYTE
            elif self._input_state == InputState.PURE_ASCII and \
                    self.ESC_DETECTOR.search(self._last_char + byte_str):
                self._input_state = InputState.ESC_ASCII

self._last_char = byte_str[-1:]

# If we've seen escape sequences, use the EscCharSetProber, which
        # uses a simple state machine to check for known escape sequences in
        # HZ and ISO-2022 encodings, since those are the only encodings that
        # use such sequences.
        if self._input_state == InputState.ESC_ASCII:
            if not self._esc_charset_prober:
                self._esc_charset_prober = EscCharSetProber(self.lang_filter)
            if self._esc_charset_prober.feed(byte_str) == ProbingState.FOUND_IT:
                self.result = {'encoding':
                               self._esc_charset_prober.charset_name,
                               'confidence':
                               self._esc_charset_prober.get_confidence(),
                               'language':
                               self._esc_charset_prober.language}
                self.done = True
        # If we've seen high bytes (i.e., those with values greater than 127),
        # we need to do more complicated checks using all our multi-byte and
        # single-byte probers that are left.  The single-byte probers
        # use character bigram distributions to determine the encoding, whereas
        # the multi-byte probers use a combination of character unigram and
        # bigram distributions.
        elif self._input_state == InputState.HIGH_BYTE:
            if not self._charset_probers:
                self._charset_probers = [MBCSGroupProber(self.lang_filter)]
                # If we're checking non-CJK encodings, use single-byte prober
                if self.lang_filter & LanguageFilter.NON_CJK:
                    self._charset_probers.append(SBCSGroupProber())
                self._charset_probers.append(Latin1Prober())
            for prober in self._charset_probers:
                if prober.feed(byte_str) == ProbingState.FOUND_IT:
                    self.result = {'encoding': prober.charset_name,
                                   'confidence': prober.get_confidence(),
                                   'language': prober.language}
                    self.done = True
                    break
            if self.WIN_BYTE_DETECTOR.search(byte_str):
                self._has_win_bytes = True

def close(self):
        """
        Stop analyzing the current document and come up with a final
        prediction.

:returns:  The ``result`` attribute, a ``dict`` with the keys
                   `encoding`, `confidence`, and `language`.
        """
        # Don't bother with checks if we're already done
        if self.done:
            return self.result
        self.done = True

if not self._got_data:
            self.logger.debug('no data received!')

# Default to ASCII if it is all we've seen so far
        elif self._input_state == InputState.PURE_ASCII:
            self.result = {'encoding': 'ascii',
                           'confidence': 1.0,
                           'language': ''}

# If we have seen non-ASCII, return the best that met MINIMUM_THRESHOLD
        elif self._input_state == InputState.HIGH_BYTE:
            prober_confidence = None
            max_prober_confidence = 0.0
            max_prober = None
            for prober in self._charset_probers:
                if not prober:
                    continue
                prober_confidence = prober.get_confidence()
                if prober_confidence > max_prober_confidence:
                    max_prober_confidence = prober_confidence
                    max_prober = prober
            if max_prober and (max_prober_confidence > self.MINIMUM_THRESHOLD):
                charset_name = max_prober.charset_name
                lower_charset_name = max_prober.charset_name.lower()
                confidence = max_prober.get_confidence()
                # Use Windows encoding name instead of ISO-8859 if we saw any
                # extra Windows-specific bytes
                if lower_charset_name.startswith('iso-8859'):
                    if self._has_win_bytes:
                        charset_name = self.ISO_WIN_MAP.get(lower_charset_name,
                                                            charset_name)
                self.result = {'encoding': charset_name,
                               'confidence': confidence,
                               'language': max_prober.language}

# Log all prober confidences if none met MINIMUM_THRESHOLD
        if self.logger.getEffectiveLevel() == logging.DEBUG:
            if self.result['encoding'] is None:
                self.logger.debug('no probers hit minimum threshold')
                for group_prober in self._charset_probers:
                    if not group_prober:
                        continue
                    if isinstance(group_prober, CharSetGroupProber):
                        for prober in group_prober.probers:
                            self.logger.debug('%s %s confidence = %s',
                                              prober.charset_name,
                                              prober.language,
                                              prober.get_confidence())
                    else:
                        self.logger.debug('%s %s confidence = %s',
                                          prober.charset_name,
                                          prober.language,
                                          prober.get_confidence())
        return self.result

cmd: