python实现按行分割文件

#!/usr/bin/env python#--*-- coding:utf-8 --*-- import os class SplitFiles(): """按行分割文件"""  def __init__(self, file_name, line_count=200): """初始化要分割的源文件名和分割后的文件行数""" self.file_name = file_name self.line_count = line_count  def split_file(self): if self.file_name and os.path.exists(self.file_name): try: with open(self.file_name) as f : # 使用with读文件  temp_count = 0  temp_content = []  part_num = 1  for line in f:  if temp_count < self.line_count:  temp_count += 1  else :  self.write_file(part_num, temp_content)  part_num += 1  temp_count = 1  temp_content = []  temp_content.append(line)  else : # 正常结束循环后将剩余的内容写入新文件中  self.write_file(part_num, temp_content)  except IOError as err: print(err) else: print("%s is not a validate file" % self.file_name)  def get_part_file_name(self, part_num): """"获取分割后的文件名称：在源文件相同目录下建立临时文件夹temp_part_file，然后将分割后的文件放到该路径下""" temp_path = os.path.dirname(self.file_name) # 获取文件的路径（不含文件名） part_file_name = temp_path + "temp_part_file" if not os.path.exists(temp_path) : # 如果临时目录不存在则创建 os.makedirs(temp_path) part_file_name += os.sep + "temp_file_" + str(part_num) + ".part" return part_file_name  def write_file(self, part_num, *line_content): """将按行分割后的内容写入相应的分割文件中""" part_file_name = self.get_part_file_name(part_num) print(line_content) try : with open(part_file_name, "w") as part_file: part_file.writelines(line_content[0]) except IOError as err: print(err) if __name__ == "__main__": sf = SplitFiles(r"F:/multiple_thread_read_file.txt") sf.split_file()

#! /usr/bin/env python# -*- coding: utf-8 -*- LIMIT=1000file_count=0url_list=[] with open("123.txt") as f: for line in f: url_list.append(line) if len(url_list)<LIMIT: continue #数据达到LIMIT file_name=str(file_count)+".txt" with open(file_name,'w') as file: for url in url_list[:-1]: #print(url) file.write(url) file.write(url_list[-1].strip()) url_list=[] file_count+=1if url_list: file_name=str(file_count)+".txt" with open(file_name,'w') as file: for url in url_list: file.write(url)print('done')