python正则替换非数字字符代码示范

下面的python代码先清理字符串中的非电话号码部分，然后又清除了电话号码中的非数字字符

#!/usr/bin/python
import re

phone = "2004-959-559 # This is Phone Number"

# Delete Python-style comments
num = re.sub(r'#.*$', "", phone)
print "Phone Num : ", num

# Remove anything other than digits
num = re.sub(r'\D', "", phone)    
print "Phone Num : ", num

执行结果如下

Phone Num :  2004-959-559
Phone Num :  2004959559