查询文件中含有特殊字符串的行
#!/usr/bin/python
# -*- coding:utf-8 -*-
import re
file1 = open('test.txt','r+')
istxt = re.compile(r'.*if.*',re.I)
for line in file1.readlines():
line = line.strip()
ifstr = re.findall(istxt,line)
if ifstr:
print ifstr
删除特定行(创建新文件,把不含字符的那些行写进新文件中,重命名文件成原来的文件名称)
'''
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'''
#!/usr/bin/python
# -*- coding:utf-8 -*-
import re
import os
file1 = open('test.txt','r+')
new_file = 'new_test.txt'
if not os.path.exists(new_file):
os.system(r"touch {}".format(new_file))
file2 = open('new_test.txt','r+')
istxt = re.compile(r'.*if.*',re.I)
for line in file1.readlines():
line = line.strip()
ifstr = re.findall(istxt,line)
if ifstr:
line = []
else:
file2.write(line + '\n')
file1.close()
file2.close()
#重命名文件
os.rename("new_test.txt","test.txt")
暂时想到这个思路,不知道还有其他思路没有 ?