python - TypeError：不支持的格式字符串传递给 NoneType.__format__

Question

first_name = input("what is your first name?")
Last_name = input("what is your last name?")

name = f'{first_name}, {Last_name}'

print("hello, {} welcome to the program!").format(name)

标签： pythontypeerror

Answer 1

format是字符串的一种方法，您必须将其应用于字符串。目前，您放错了()，它应用在print()不正确的地方。

你必须这样做：

first_name = input("what is your first name?") 
Last_name = input("what is your last name?")

name = f'{first_name}, {Last_name}'

print("hello, {} welcome to the program!".format(name))