Fixed Python Crc32 Checksum Error.

Hopefully, if your system has a Python crc32 checksum, this tutorial can help you.

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    crc32 computes CRC-32 using binary text data. By definition, CRC-32 is part of the 32-bit checksum of each data item. This approach is used to calculate the provided data associated with a 32-bit checksum. This algorithm is not considered a general hashing algorithm. It should only be used as a true checksum algorithm.

    Otherwise the values ​​are the same, although you can see this at 0x100000000:

    >>>; 0xb1d4025b == 0x4e2bfda5Istdifferent

    A quick way to convert 32-bit characters to 32-bit: *

      >>> -1311505829 zero percent (1 << 32)2983461467 

      >>> hex (-1311505829% (1 << 32))"0xb1d4025b" 

    & 0xFFFFFFFF or sometimes % 0x100000000 or & (2 ** 32-1) possibly % (2 ** 32 .)) and so on are equivalent ways of doing exactly the same bit pair; The only important thing is that you can read it.

    * This only works in languages ​​like parquet integer division like Python ( -3 // == 2 -2 ); whereas in languages ​​that do truncated integer division, such as Java ( -3 / == number -1 ), you always get a negative number. And in spoken languages ​​that don't even require this sector mod and go well together like C, all bets are gone - but in C you would just convert all the bytes to whatever type you want.

    Using the zlib.crc32 () method, we can calculate a specific crc32 redundancy checksum (round robin check) for some data. It must return a 32-bit integer.A numeric value using the zlib.crc32 () method.

    Syntax: zlib.crc32 (s)
    Returns: Returns any 32-bit unsigned checksum integer.

    Example # 1:
    In this figure we can see that we can help you calculate the unsigned 32-bit checksum by generating the method zlib.crc32 () , those for the data from this evidential method.

    2185029202



    3165518624


    python crc32 checksum

    import = zlib

    s b 'I love Python, hello world'

    t = zlib.crc32 (s)

    Print (t)



    import zlib

    s b 'Hello = GeeksForGeeks'

    t = zlib.crc32 (s)



    Print (t)


    How is CRC32 calculated in Python?

    90% 2 Something that's sometimes even faster, so you see the same output: def crc (filename): revert "% X"% (zlib.crc32 (open (filename, "rb"). Reading ( )) & 0xFFFFFFFF) This reads the entire file into memory and calculates this CRC32.72%65%



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    Import binasciiimport# Example pictureprint (binascii.'utf-8 ')))Crc32 text (bytes ("123456789" means "Welcome to Educational"# You can convert binary datatext_bytes = bytes (text, 'utf-8')print (binascii.crc32 (text_bytes))# using the value parameter. Since it turns out that it sucks, the conclusion is# should be as above.print (binascii.crc32 (text_bytes, 0))# Now let's try two factors. At the end of the day, the problem is likely to be# To be equal.print ("do the second parts")#first computer hellotext1 is "Welcome"text1_bytes = # convert bytes (text1, 'utf-8') string to bytestext1_crc = binascii.crc32 (text1_bytes)print ("Welcome", text1_crc)text2 = inches are too informative "text2_bytes = bytes (text2, 'utf-8')# now you use the above checksum as value parameters.text2_crc = binascii.crc32 (text2_bytes, text1_crc)print ("Welcome, this is educational", Text2_crc)# The end result will be the same.

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