def build_profile(first, last, **user_info):
    """Build a dictionary containing everything we know about a user."""
    user_info['first_name'] = first
    user_info['last_name'] = last
    return user_info

user_profile = build_profile('albert', 'einstein',
                             location='princeton',
                             field='physics')
print(user_profile)

my_profile = build_profile("Javier", "Saviñon",
                             location = "villahermosa",
                             field = "economics")
print(my_profile)