python 根据开头时间戳 合并两个文件

#!/usr/bin/python
# -*- coding: utf-8 -*-
import os
import sys
import io
import time

file1 = sys.argv[1]
file2 = sys.argv[2]
list_all = [] 


def get_current_time():
    time_stamp = time.time()  # 当前时间的时间戳
    local_time = time.localtime(time_stamp)  #
    str_time = time.strftime('%Y-%m-%d---%H-%M-%S.txt', local_time)
    return str_time


def file_get(file):
    print file
    i = 0
    with io.open(file,'r',encoding='utf-8-sig') as fp:
        lines = fp.readlines()
        for line in lines:
			      #line =line.strip()          
	          t1 = line[3:15]
	          str2 = line[16:]
	          #s1 = line[0:2]
	          sub_dict = {}
	          sub_dict["time"] = t1
	          sub_dict["at"] = str2	         
	          #import binascii
	          #hex_digits = binascii.b2a_hex(line)
	          #print hex_digits
	          #print line[3], line[16]
	          print line,len(line),"-line----"
	          print t1,len(t1),"---t1--"
	          print str2,len(str2),"---str2--"
	          #print s1,len(s1),"---s1--"
	          print sub_dict
	          list_all.append(sub_dict)
	          #i +=1
	          #if (4==i):
	          #    break;
 
def file_write(file):
    new_s = sorted(list_all,key = lambda e:e.__getitem__('time'))
    with io.open(file,"w",encoding='utf-8') as fp:
        for line in new_s:
            str = line["time"] + " " + line["at"]
            print type(str), str
            fp.writelines(str)
            
                       
def main():
    #print "we are in %s"%__name__
    #print file1, file2
    file_get(file1)
    file_get(file2)
    #for l in list_all:
    #    print l
    d1 = get_current_time()
    print d1
    file_write(d1)

if __name__ == '__main__':
    main()