1 #计算文件的CRC32值
 2 import sys
 3 import zlib
 4 import os.path
 5 filename=sys.argv[1]
 6 print(filename)
 7 if os.path.isfile(filename):
 8     fp=open(filename,‘rb‘)
 9     contents=fp.read()
10     fp.close()
11     print(zlib.crc32(contents.encode()))
12 else:
13     print(‘file not exists‘)