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Python 2.5.2 (r252:60911, Mar 27 2008, 17:57:18) [MSC v.1310 32 bit (Intel)] on win32)ÀïÃæµÄ°´Î»È¡·´¾¡È»²»Êǰ´Î»È¡·´£¬ÍøÉÏËѳöºÃ¶àÎÄÕ¶¼Ëµ¡«ÔÚpythonÖÐÊǰ´Î»È¡·´£¬×Ô¼º²âÊÔÁËÏ£º
>>> ~3,~2,~1,~0,~-1,~-2,~3
(-4, -3, -2, -1, 0, 1, -4)
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>>> import binascii
>>> binascii.crc32("ÎÒÃÇ")
-603163415
Èç¹û°ÑÏÂÃæ´úÂëµÄµ¹ÊýµÚ¶þÐÐ
dwCrc32 = dwCrc32 ^ 0xFFFFFFFFL
¸Ä³É
dwCrc32 = ~dwCrc32
È»ºóÔËÐУºmycrc32("ÎÒÃÇ") µÃµ½½á¹ûÒ²ÊÇ-603163415
ËùÒÔ»³ÒÉpython2.5ÀïÃæÊDz»ÊÇÒ²ÖÐÁËÕâ¸öÏÝÚåÁË¡£
ÓÃÏÂÃæµÄ´úÂëµÃµ½µÄ¾ÍºÍc´úÂë¼ÆËãµÃµ½µÄcrc32УÑéÂëÒ»ÖÂÁË¡£²»¹ýpythonÖ§³ÖµÄÕýÊýÒª±ÈcµÄ´ó£¬ËùÒÔ°´Î»Çó·´ÕâÀïÖ»Äܱ£Ö¤32λÇé¿öϵõ½ºÍc´úÂëÒ»ÑùµÄУÑéÂë¡£
#coding=gbk
def mycrc32(szString):
    m_pdwCrc32Table = [0 for x in range(0,256)]
    dwPolynomial = 0xEDB88320;
    dwCrc = 0
    for i in range(0,255):
        dwCrc = i
        for j in [8,7,6,5,4,3,2,1]:
            if dwCrc & 1:
                dwCrc = (dwCrc >> 1) ^ dwPolynomial
            else:
                dwCrc >>= 1
     &nb


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