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#!/usr/bin/python3
import os
import os.path
import sqlite3
from argparse import ArgumentParser
import utils
from myconfig import MyConfig
SELECT_NGRAM_DML = '''
Select freq from ngram where words = "?";
'''
INSERT_NGRAM_DML = '''
Insert into ngram(words, freq) values("?", ?);
'''
UPDATE_NGRAM_DML = '''
Update ngram set freq = ? where words = "?";
'''
SELECT_ALL_DML = '''
Select words, freq from ngram;
'''
INSERT_BIGRAM_DML = '''
Insert into bigram(prefix, postfix, freq) values ("?", "?", ?);
'''
config = MyConfig()
#maximum combine number
N = config.getMaximumCombineNumber()
#change cwd to the word recognizer directory
words_dir = config.getWordRecognizerDir()
os.makedirs(words_dir, exist_ok=True)
os.chdir(words_dir)
#chdir done
def handleError(error):
sys.exit(error)
def handleOneDocument(infile, conn, length):
print(infile, length)
infilestatuspath = infile + config.getStatusPostfix()
infilestatus = utils.load_status(infilestatuspath)
if not utils.check_epoch(infilestatus, 'Segment'):
raise utils.EpochError('Please segment first.\n')
if utils.check_epoch(infilestatus, 'Populate'):
return False
sep = config.getWordSep()
#train
docfile = open(infile + config.getSegmentPostfix(), 'r')
words = []
for oneline in docfile.readlines():
oneline = oneline.rstrip(os.linesep)
if len(oneline) == 0:
continue
(token, word) = oneline.split(" ", 1)
token = int(token)
if 0 == token:
words = []
else:
words.append(word)
if len(words) < length:
continue
if len(words) > length:
words.pop(0)
assert len(words) == length
#do sqlite training
words_str = sep + sep.join(words) + sep
print(words)
docfile.close()
#sign epoch
#utils.sign_epoch(infilestatus, 'Populate')
#utils.store_status(infilestatuspath, infilestatus)
return True
def handleOnePass(indexpath, workdir, length):
print(indexpath, workdir, length)
filename = config.getNgramFileName(length)
filepath = workdir + os.sep + filename
conn = sqlite3.connect(filepath)
#begin processing
indexfile = open(indexpath, 'r')
for oneline in indexfile.readlines():
oneline = oneline.rstrip(os.linesep)
(title, textpath) = oneline.split('#')
infile = config.getTextDir() + textpath
infilesize = utils.get_file_length(infile + config.getSegmentPostfix())
if infilesize < config.getMinimumFileSize():
print("Skipping " + title + '#' + textpath)
continue
#process one document
handleOneDocument(infile, conn, length)
indexfile.close()
conn.commit()
if conn:
conn.close()
def handleBigramPass(indexpath, workdir):
pass
def handleOneIndex(indexpath, subdir, indexname):
print(indexpath, subdir, indexname)
indexstatuspath = indexpath + config.getStatusPostfix()
indexstatus = utils.load_status(indexstatuspath)
if not utils.check_epoch(indexstatus, 'Prepare'):
raise utils.EpochError('Please prepare first.\n')
if utils.check_epoch(indexstatus, 'Populate'):
return
workdir = config.getWordRecognizerDir() + os.sep + \
subdir + os.sep + indexname
print(workdir)
for i in range(1, N + 1):
handleOnePass(indexpath, workdir, i)
handleBigramPass(indexpath, workdir)
#sign epoch
#utils.sign_epoch(indexstatus, 'Populate')
#utils.store_status(indexstatuspath, indexstatus)
def walkThroughIndex(path):
for root, dirs, files in os.walk(path, topdown=True, onerror=handleError):
for onefile in files:
filepath = os.path.join(root, onefile)
indexpostfix = config.getIndexPostfix()
if onefile.endswith(indexpostfix):
subdir = os.path.relpath(root, path)
indexname = onefile[:-len(indexpostfix)]
handleOneIndex(filepath, subdir, indexname)
elif onefile.endswith(config.getStatusPostfix()):
pass
else:
print('Unexpected file:' + filepath)
if __name__ == '__main__':
parser = ArgumentParser(description='Populate n-gram.')
parser.add_argument('--indexdir', action='store', \
help='index directory', \
default=os.path.join(config.getTextDir(), 'index'))
args = parser.parse_args()
print(args)
walkThroughIndex(args.indexdir)
print('done')
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