(b_pr_k, a, p)
return pow(a, b_pr_k) % p
Bob calculate his public key
    with his private key.
    This is open to public
Bob calculate his public key
    with his private key.
    This is open to public
Bob calculate his public key with his private key . This is open to public
def bob_public_key(b_pr_k, a, p):
    """Bob calculate his public key
    with his private key.
    This is open to public"""
    return pow(a, b_pr_k) % p
def bob_public_key ( b_pr_k , a , p ) : return pow ( a , b_pr_k ) % p