Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/chardet/charsetgroupprober.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 ######################## BEGIN LICENSE BLOCK ########################
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2 # The Original Code is Mozilla Communicator client code.
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3 #
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4 # The Initial Developer of the Original Code is
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5 # Netscape Communications Corporation.
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6 # Portions created by the Initial Developer are Copyright (C) 1998
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7 # the Initial Developer. All Rights Reserved.
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8 #
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9 # Contributor(s):
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10 # Mark Pilgrim - port to Python
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11 #
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12 # This library is free software; you can redistribute it and/or
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13 # modify it under the terms of the GNU Lesser General Public
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14 # License as published by the Free Software Foundation; either
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15 # version 2.1 of the License, or (at your option) any later version.
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16 #
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17 # This library is distributed in the hope that it will be useful,
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18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 # Lesser General Public License for more details.
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21 #
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22 # You should have received a copy of the GNU Lesser General Public
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23 # License along with this library; if not, write to the Free Software
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24 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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25 # 02110-1301 USA
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26 ######################### END LICENSE BLOCK #########################
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27
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28 from .enums import ProbingState
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29 from .charsetprober import CharSetProber
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30
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31
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32 class CharSetGroupProber(CharSetProber):
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33 def __init__(self, lang_filter=None):
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34 super(CharSetGroupProber, self).__init__(lang_filter=lang_filter)
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35 self._active_num = 0
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36 self.probers = []
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37 self._best_guess_prober = None
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38
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39 def reset(self):
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40 super(CharSetGroupProber, self).reset()
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41 self._active_num = 0
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42 for prober in self.probers:
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43 if prober:
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44 prober.reset()
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45 prober.active = True
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46 self._active_num += 1
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47 self._best_guess_prober = None
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48
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49 @property
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50 def charset_name(self):
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51 if not self._best_guess_prober:
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52 self.get_confidence()
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53 if not self._best_guess_prober:
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54 return None
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55 return self._best_guess_prober.charset_name
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56
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57 @property
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58 def language(self):
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59 if not self._best_guess_prober:
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60 self.get_confidence()
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61 if not self._best_guess_prober:
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62 return None
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63 return self._best_guess_prober.language
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64
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65 def feed(self, byte_str):
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66 for prober in self.probers:
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67 if not prober:
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68 continue
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69 if not prober.active:
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70 continue
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71 state = prober.feed(byte_str)
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72 if not state:
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73 continue
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74 if state == ProbingState.FOUND_IT:
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75 self._best_guess_prober = prober
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76 return self.state
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77 elif state == ProbingState.NOT_ME:
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78 prober.active = False
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79 self._active_num -= 1
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80 if self._active_num <= 0:
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81 self._state = ProbingState.NOT_ME
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82 return self.state
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83 return self.state
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84
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85 def get_confidence(self):
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86 state = self.state
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87 if state == ProbingState.FOUND_IT:
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88 return 0.99
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89 elif state == ProbingState.NOT_ME:
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90 return 0.01
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91 best_conf = 0.0
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92 self._best_guess_prober = None
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93 for prober in self.probers:
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94 if not prober:
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95 continue
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96 if not prober.active:
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97 self.logger.debug('%s not active', prober.charset_name)
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98 continue
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99 conf = prober.get_confidence()
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100 self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf)
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101 if best_conf < conf:
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102 best_conf = conf
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103 self._best_guess_prober = prober
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104 if not self._best_guess_prober:
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105 return 0.0
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106 return best_conf