python实现按行分割文件
本文实例为大家分享了python实现按行分割文件的具体代码，供大家参考，具体内容如下
#!/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()
小编再为大家分享一段代码：
将文本文件按照指定的行数分割成数个小的文本文件
#! /usr/bin/env python
# -*- coding: utf-8 -*-
LIMIT=1000
file_count=0
url_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+=1
if 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')
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。