python去重txt文本_Python文本去重

用法：命令行python unique.py -f file.txt

输出：去除重复字符后的output.txt# -*- coding:utf-8 -*-

#auther_cclarence_2016_4_6

#open file and read out the characters

from optparse import OptionParser

import sys

reload(sys)

sys.setdefaultencoding("utf-8")

def readfile(filename):

try:

f = open(filename)

except Exception, e:

print "No such file"

exit(0)

text = f.readlines()

f.close()

for i in range(0,len(text)-1):

text[i] = text[i][:-1]

return text

#deduplication

def unique(arr):

arr1 = list(set(arr))

arr1.sort(key = arr.index)

return arr1

def main():

parser = OptionParser()

parser.add_option("-f", "--file", dest="filename",help="write report to FILE", metavar="FILE")

(options, args) = parser.parse_args()

filename = options.filename

text = readfile(filename)

text_dealed = unique(text)

for i in range(0,len(text_dealed)-1):

text_dealed[i] = text_dealed[i] +'n'

f = open("output.txt","w")

f.writelines(text_dealed)

f.close()

deduplication_num = len(text) - len(text_dealed)

print "success"

print "The num of data from the source file :" + str(len(text))

print "The num of data from the preprocessed file: :" + str(len(text_dealed))

print "The num of data removed :" + str(deduplication_num)

if __name__ == '__main__':

main()

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