Python脚本 - 常用单位转换

import pstuil

def bytes2human(n):
      symbols = ('K','M','G','T','P','E','Z','Y')
      prefix = {}
      for i,s in enumerate(symbols):
          prefix[s] = 1 << (i + 1) * 10
      for s in reversed(symbols):
          if n >= prefix[s]:
              value = float(n) / prefix[s]
              return '%.1f%s' % (value,s)
      return '%sB' % n
 
if __name__ == '__main__':
	bytes2human(psutil.virtual_memory().total)