p001_add_two_numbers.py

一、传统：

1 number1=1.5
2 number2=3.8
3 sum=number1+number2
4 print(number1,"+",number2,"=",sum)

效果：

1 [root@localhost 100]# python p001_add_two_numbers.py

2 1.5 + 3.8 = 5.3

二、f{}

1 [root@localhost 100]# vim p001_add_two_numbers.py
2 number1=1.5
3 number2=3.8
4 sum=number1+number2
5 #print(number1,"+",number2,"=",sum)
6 print(f"{number1}+{number2}={sum}")

效果：

1 [root@localhost 100]# python p001_add_two_numbers.py

2 1.5+3.8=5.3

推测：f开头表示在字符串内支持大括号内的python 表达式