#!/usr/bin/env python

from hashlib import md5, sha1

from zlib import crc32

import sys

def getMd5(filename): #计算md5

    mdfive = md5()

    with open(filename, 'rb') as f:

        mdfive.update(f.read())

    return mdfive.hexdigest()

def getSha1(filename): #计算sha1

    sha1Obj = sha1()

    with open(filename, 'rb') as f:

        sha1Obj.update(f.read())

    return sha1Obj.hexdigest()

def getCrc32(filename): #计算crc32

    with open(filename, 'rb') as f:

        return crc32(f.read())

if len(sys.argv) < 2:

    print('You must enter the file')

    exit(1)

elif len(sys.argv) > 2:

    print('Only one file is permitted')

    exit(1)

filename = sys.argv[1]

print('{:8} {}'.format('md5:', getMd5(filename)))

print('{:8} {}'.format('sha1:', getSha1(filename)))

print('{:8} {:x}'.format('crc32:', getCrc32(filename)))