如何用Python语言实现在一个文件中查找特定的字符串？ python 怎样在文件中查找指定的字符串
\u5982\u4f55\u7528Python\u8bed\u8a00\u5b9e\u73b0\u5728\u4e00\u4e2a\u6587\u4ef6\u4e2d\u67e5\u627e\u7279\u5b9a\u7684\u5b57\u7b26\u4e32targetstr \u4e3a\u7279\u5b9a\u5b57\u7b26\u4e32
filename\u4e3a\u6587\u4ef6\u540d
with open\uff08filename\uff0c'r'\uff09as fp:
for line in fp:
if targetstr in line:
print line
\u8fd9\u6837\u5c31\u627e\u5230\u7279\u5b9a\u5b57\u7b26\u4e32\u6240\u5728\u7684\u884c\u5185\u5bb9\u4e86
\u7b2c\u4e00\u79cd\u60c5\u51b5\uff1a\u5728python\u7f16\u8f91\u5668\u4e2d\u627e\u4e00\u4e2a\u5b57\u7b26\u4e32string
ctrl+f
\u7b2c\u4e8c\u79cd\u60c5\u51b5\uff1a\u5224\u65ad\u5143\u7ec4\u6216\u5217\u8868\u5185\u662f\u5426\u5305\u542b\u5b57\u7b26\u4e32\uff1astring in list
用正则表达式
>>> s='hello world'
>>> import re
>>> re.search('wor',s)
<_sre.SRE_Match object; span=(6, 9), match='wor'>
def find_word(filename,word):
flag = False
with open(filename, 'r') as f:
for l in f.readlines():
if word in l:
flag = True
break
return flag
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