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#!/usr/bin/env python
#-*- coding:utf-8 -*-
###############################################################
# PyNLPl - Frequency List Generator
# by Maarten van Gompel (proycon)
# http://ilk.uvt.nl/~mvgompel
# Induction for Linguistic Knowledge Research Group
# Universiteit van Tilburg
#
# Licensed under GPLv3
#
###############################################################
from __future__ import print_function
from __future__ import unicode_literals
from __future__ import division
from __future__ import absolute_import
import argparse
import sys
import io
from pynlpl.statistics import FrequencyList, Distribution
from pynlpl.textprocessors import Windower, crude_tokenizer
def main():
parser = argparse.ArgumentParser(description="Generate an n-gram frequency list", formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-n','--ngramsize', help="N-gram size", type=int, action='store',default=1)
parser.add_argument('-i','--caseinsensitive', help="Case insensitive", action="store_true")
parser.add_argument('-e','--encoding', help="Character encoding", type=str, action='store',default='utf-8')
parser.add_argument('files', type=str, nargs='+', help="The data sets to sample from, must be of equal size (i.e., same number of lines)")
args = parser.parse_args()
if not args.files:
print("No files specified", file=sys.stderr)
sys.exit(1)
freqlist = FrequencyList(None, args.caseinsensitive)
for filename in args.files:
f = io.open(filename,'r',encoding=args.encoding)
for line in f:
if args.ngramsize > 1:
freqlist.append(Windower(crude_tokenizer(line),args.ngramsize))
else:
freqlist.append(crude_tokenizer(line))
f.close()
dist = Distribution(freqlist)
for type, count in freqlist:
if isinstance(type,tuple) or isinstance(type,list):
type = " ".join(type)
s = type + "\t" + str(count) + "\t" + str(dist[type]) + "\t" + str(dist.information(type))
print(s)
print("Tokens: ", freqlist.tokens(),file=sys.stderr)
print("Types: ", len(freqlist),file=sys.stderr)
print("Type-token ratio: ", freqlist.typetokenratio(),file=sys.stderr)
print("Entropy: ", dist.entropy(),file=sys.stderr)
if __name__ == '__main__':
main()
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