TA貢獻1798條經驗 獲得超3個贊
如果您的地址始終在一行的末尾，請在該行上定位：
ip_at_end = re.compile(r'(?:[0-9]{1,3}\.){3}[0-9]{1,3}$', re.MULTILINE)
此正則表達式僅匹配行尾的點分四邊形（4組數字，中間有點）。
演示：
>>> import re
>>> ip_at_end = re.compile(r'(?:[0-9]{1,3}\.){3}[0-9]{1,3}$', re.MULTILINE)
>>> example = '''\
... Only addresses on the end of a line match: 123.241.0.15
... Anything else doesn't: 124.76.67.3, even other addresses.
... Anything that is less than a dotted quad also fails, so 1.1.4
... does not match but 1.2.3.4
... will.
... '''
>>> ip_at_end.findall(example)
['123.241.0.15', '1.2.3.4']
TA貢獻1810條經驗 獲得超4個贊
這將匹配并驗證ipv4地址，并確保各個字節在0-255的范圍內
(?:([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])
免責聲明
是的，我意識到OP要求使用Python解決方案。僅包含此PHP解決方案以說明該表達式的工作原理
PHP的例子
<?php
$sourcestring="this is a valid ip 12.34.56.78
this is not valid ip 12.34.567.89";
preg_match_all('/(?:(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/i',$sourcestring,$matches);
echo "<pre>".print_r($matches,true);
?>
$matches Array:
(
[0] => Array
(
[0] => 12.34.56.7
)
)
舉報