{% highlight Python %}

import re

class Demo:

def checkIP(self,inputSeq):

patternIP = '^([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])$'

if re.search(patternIP,inputSeq):

return 1

else:

return 0

if __name__ == '__main__':

demo = Demo()

ip = '10.19.10.2'

print demo.checkIP(ip)

{% endhighlight %}