Python 逐行分割大txt文件的方法

# -*- coding: <encoding name> -*-import ioLIMIT = 150000file_count = 0url_list = []with io.open('D:/DB_NEW_bak/DB_NEW_20171009_bak.sql','r',encoding='utf-16') as f:  for line in f:    url_list.append(line)    if len(url_list) < LIMIT:      continue    file_name = str(file_count)+".sql"    with io.open(file_name,'w',encoding='utf-16') as file:      for url in url_list[:-1]:        file.write(url)      file.write(url_list[-1].strip())      url_list=[]      file_count+=1if url_list:  file_name = str(file_count) + ".sql"  with io.open(file_name,'w',encoding='utf-16') as file:    for url in url_list:      file.write(url)print('done')

f = open("foo.txt")       # 返回一个文件对象 line = f.readline()       # 调用文件的 readline()方法 while line:   print line,         # 后面跟 ',' 将忽略换行符   # print(line, end = '')　　　# 在 Python 3中使用   line = f.readline()  f.close() 

for line in open("foo.txt"):   print line, 

f = open("c://1.txt","r") lines = f.readlines()#读取全部内容 for line in lines   print line