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yomichan-anki/yomi_base/japanese/dictionary.py
2013-11-09 15:42:02 -08:00

122 lines
3.8 KiB
Python

# -*- coding: utf-8 -*-
# Copyright (C) 2013 Alex Yatskov
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import operator
import sqlite3
class Dictionary:
def __init__(self, filename, index=True):
self.db = sqlite3.connect(filename)
self.indices = set()
def findTerm(self, word, partial=False):
self.requireIndex('Terms', 'expression')
self.requireIndex('Terms', 'reading')
cursor = self.db.cursor()
cursor.execute('SELECT * FROM Terms WHERE expression {0} ? OR reading=?'.format('LIKE' if partial else '='), (word, word))
results = list()
for expression, reading, definitions, tags in cursor.fetchall():
results.append({
'expression': expression,
'reading': reading,
'definitions': definitions,
'tags': tags.split()
})
return results
def findCharacter(self, character):
cursor = self.db.cursor()
cursor.execute('SELECT * FROM Kanji WHERE character=? LIMIT 1', character)
query = cursor.fetchone()
if query is not None:
character, kunyomi, onyomi, meanings = result
return {
'character': character,
'kunyomi': kunyomi,
'onyomi': onyomi,
'meanings': meanings
}
def findCharacterVisually(self, characters):
radicals = dict()
for character in characters:
for radical in self.findRadicalsByCharacter(character):
radicals[radical] = radicals.get(radical, 0) + 1
results = dict()
for radical, count in radicals.items():
for character in self.findCharactersByRadical(radical):
results[character] = results.get(character, 0) + count
return sorted(results.items(), key=operator.itemgetter(1), reverse=True)
def findRadicalsByCharacter(self, character):
cursor = self.db.cursor()
cursor.execute('SELECT radicals FROM Radicals WHERE character=? LIMIT 1', character)
columns = cursor.fetchone()
if columns is None:
return None
return columns[0].split()
def findCharactersByRadical(self, radical):
cursor = self.db.cursor()
cursor.execute('SELECT character FROM Radicals WHERE radicals LIKE ?', (u'%{0}%'.format(radical),))
columns = cursor.fetchall()
if columns is None:
return None
return map(operator.itemgetter(0), columns)
def requireIndex(self, table, column):
name = 'index_{0}_{1}'.format(table, column)
if not self.hasIndex(name):
self.buildIndex(name, table, column)
def buildIndex(self, name, table, column):
cursor = self.db.cursor()
cursor.execute('CREATE INDEX {0} ON {1}({2})'.format(name, table, column))
self.db.commit()
def hasIndex(self, name):
if name in self.indices:
return True
cursor = self.db.cursor()
cursor.execute('SELECT * FROM sqlite_master WHERE name=?', (name,))
if len(cursor.fetchall()) == 0:
return False
self.indices.update([name])
return True