Bitcoin address / key functions

keyUtils.py

def privateKeyToWif(key_hex):    
    return utils.base58CheckEncode(0x80, key_hex.decode('hex'))
    
def privateKeyToPublicKey(s):
    sk = ecdsa.SigningKey.from_string(s.decode('hex'), curve=ecdsa.SECP256k1)
    vk = sk.verifying_key
    return ('\04' + sk.verifying_key.to_string()).encode('hex')
    
def pubKeyToAddr(s):
    ripemd160 = hashlib.new('ripemd160')
    ripemd160.update(hashlib.sha256(s.decode('hex')).digest())
    return utils.base58CheckEncode(0, ripemd160.digest())

def keyToAddr(s):
    return pubKeyToAddr(privateKeyToPublicKey(s))

# Warning: this random function is not cryptographically strong and is just for example
private_key = ''.join(['%x' % random.randrange(16) for x in range(0, 64)])
print keyUtils.privateKeyToWif(private_key)
print keyUtils.keyToAddr(private_key)

import binascii
import os
import keyUtils

# Generate a 256 bits key
private_key = binascii.hexlify(os.urandom(32))