Python2 在文档中插入数据

方法一：

#!/usr/bin/env python
#_*_ coding:utf-8 _*_
import os 
def modifyFile(filename, content_add):
	hit = 0
	lines = []
	lines_tmp = []
	# 读取配置文件
	with open(filename,'r') as f:
		lines_tmp = f.readlines()
		lines = lines_tmp
		tmp = 0
		for line in lines_tmp:
		    line = line.strip()
		    hit = hit+1
		    # 在第二次出现"XXXX"后增加content_add
		    if line == "XXXXX":
		    	tmp = tmp + 1
		    	if (content_add not in lines) and tmp == 2:
		    		lines.insert(hit, content_add)
			    	break
	# 存储增加content_add后的文件
	with open(filename,"w") as f:
	    for line in lines:
f.write(line)f __name__ == '__main__':
	filename = 'C:/Users/Admin/Desktop/TEST.txt'
	content_add = 'YYYYYY'
	modifyFile(filename, content_add)

方法二：

#!/usr/bin/env python
#_*_ coding:utf-8 _*_
import os 
def modifyFile(filename, content_add):
	f = open(filename,'r+')
	tmp = 0
	lines = f.readlines()
	f.seek(0)
	for line in lines:
		f.write(line)
		if 'XXXXX' in line:
			tmp = tmp + 1
			if (content_add not in lines) and tmp == 2:
				f.write(content_add)
	f.close()
if __name__ == '__main__':
	filename = 'C:/Users/Admin/Desktop/TEST.txt'
	content_add = 'YYYYYY'
	modifyFile(filename, content_add)