def create_table():
    a = []
    for i in range(256):
        k = i
        for j in range(8):
            if k & 1:
                k ^= 0x1db710640
            k >>= 1
        a.append(k)
    return a

def crc_update(buf, crc):
    crc ^= 0xffffffff
    for k in buf:
        crc = (crc >> 8) ^ crc_table[(crc & 0xff) ^ k]
    return crc ^ 0xffffffff

crc_table = create_table()
print(hex(crc_update(b"The quick brown fox jumps over the lazy dog", 0)))