Python pseudo-code for password hashing

pseudocode.py

def login(username, password):
    user = Users.get(username) # fetch the user record from the database

    # if no user matches the username, don't log them in
    if not user:  
        return False

    # hash the supplied password
    supplied_hash = some_hash_function(password)

    # see if that hash matches the user's hash
    if supplied_hash == user.password_hash:
        return True
    else:  
        return False