s="3.14159" print("{:.2f}".format(s))A．3.14B．3C．3.14%D．ValueError: Unknown format code 'f' for object of type 'str'
s="3.14159" print("{:.2f}".format(s))
A、3.14
B、3
C、3.14%
D、ValueError: Unknown format code 'f' for object of type 'str'
发布时间：2025-07-02 11:48:19
