python string interpolation

1name = 'World'
2program = 'Python'
3print(f'Hello {name}! This is {program}')

1def two_fer(name="you"):
2    #return "One for " + name + ", one for me."
3    #return "One for %s, one for me." % name
4    #return "One for {}, one for me.".format(name)
5    return f"One for {name}, one for me."