Python实现java或者.net的getHashCode()函数，pythongethashcode,hashCode在.ne

Python实现java或者.net的getHashCode()函数，pythongethashcode,hashCode在.ne

hashCode在.net和java中应用很普遍，但是python没有内置的getHashcode函数。

如下是java版本getHashcode的python实现

# -*- coding:utf-8 -*-def convert_n_bytes(n, b):    bits = b*8    return (n + 2**(bits-1)) % 2**bits - 2**(bits-1)def convert_4_bytes(n):    return convert_n_bytes(n, 4)def getHashCode(s):    h = 0    n = len(s)    for i, c in enumerate(s):        h = h + ord(c)*31**(n-1-i)    return convert_4_bytes(h)if __name__ == '__main__':    print getHashCode('http://byrx.net/')    print getHashCode('http://byrx.net/code-snippet/2311/C-rumenjiaocheng-c-multithreading-process-course')    print getHashCode('http://byrx.net/code-snippet/2321/C-rumenjiaocheng-usage-arrow-unsafe-code-block/')    print getHashCode('http://byrx.net/code-snippet/2322/mysql-achieve-sql-server-with-lock')    print getHashCode('http://byrx.net/')    print getHashCode('http://byrx.net/code-snippet/2324/java-unit-test-usage-jMockit-mock-jingtailei')