python bytes字节换算

python bytes字节换算

#!/usr/bin/env python
# -*- coidng:utf-8 -*-
def bytes_conversion(number):
    symbols = (\'K\',\'M\',\'G\',\'T\',\'P\',\'E\',\'Z\',\'Y\')
    prefix = dict()
    for i,s in enumerate(symbols):
        prefix[s] = 1<<(i+1) *10
    for s in reversed(symbols):
        if int(number) >= prefix[s]:
            value = float(number) / prefix[s]
            return \'%.2f%s\' %(value,s)
    return "%sB" %number