def convert_bytes(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)
def convert_bytes(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)