class GetHashCode:
def convert_n_bytes(self,n, b):
bits = b*8
return (n + 2**(bits-1)) % 2**bits - 2**(bits-1)
def convert_4_bytes(self,n):
return self.convert_n_bytes(n, 4)
@classmethod
def getHashCode(cls,s):
h = 0
n = len(s)
for i, c in enumerate(s):
h = h + ord(c)*31**(n-1-i)
return cls().convert_4_bytes(h)
if __name__ == "__main__":
hashCode=GetHashCode.getHashCode("qwerty")
print(hashCode)