使用dhash库get_num_bits_different方法时遇TypeError错误求助

Hey there! Let's break down and fix the error you're encountering.

The Root Cause #

The error TypeError: unsupported operand type(s) for ^: 'str' and 'str' pops up because you're passing hexadecimal string values (hash1 and hash2) to the function, but the ^ (bitwise XOR) operator only works with integers—not strings. The method expects numeric hash values, not their string representations.

The Solution #

You need to convert your hex string hashes into integers first using Python's int() function, specifying base 16 (since the hashes are in hexadecimal format). Here's the corrected code:

def get_num_bits_different(hash1, hash2):
    # Convert hex string hashes to integers
    int_hash1 = int(hash1, 16)
    int_hash2 = int(hash2, 16)
    # Perform bitwise XOR and count differing bits
    return bin(int_hash1 ^ int_hash2).count('1')

hash1 = '3d77xxxxxxxxxxxxxxxxxxxxxxxxxxxx'
hash2 = '9301xxxxxxxxxxxxxxxxxxxxxxxxxxxx'
# Now this will work correctly
print(get_num_bits_different(hash1, hash2))

How It Works #

1. int(hash1, 16) takes the hex string and converts it to a base-10 integer, making it compatible with bitwise operations.
2. The ^ operator computes the bitwise XOR of the two integers—each bit in the result is 1 only if the corresponding bits of the inputs are different.
3. bin(...) converts the XOR result to a binary string, and .count('1') tallies up how many bits are different (exactly what you need for dhash comparison).

内容的提问来源于stack exchange，提问作者Ancalagon BerenLuthien