python为每三位数字添加点标记

#!/usr/bin/env python
# -*- # coding:gbk
def intcomma(value):
    orig = str(value)
    new = re.sub("^(-?\d+)(\d{3})", '\g<1>,\g<2>', orig)
    if orig == new:
        return new
    else:
        return intcomma(new)

if __name__ == '__main__':
    print '==start=='
    print intcomma(4500)
    print intcomma(10000000000)
    print intcomma(5464561.55)
    print '==end=='

---------- python ----------
==start==
4,500
10,000,000,000
5,464,561.55
==end==


Output completed (0 sec consumed) - Normal Termination

只是简化了Django下contrib.humanize.templatetags.humanize.py里面的一段源码。没事看看源码还是挺好的