我想反转以下代码输出的格式（行和行号都应该是相反的顺序）

Question

def ls():
    with open("todo.txt",'r+') as file:
        lines = file.readlines()
#       lines = reversed(lines)
        for num,line in enumerate(lines):
            print(num,line)

输出：

0 Lemon
    
1 StarFruit
    
2 Banana
    
3 Apple
    
4 Grapes

预期产出：

5 Grapes
    
4 Apple
    
3 Banana
    
2 Starfruit
    
1 Lemon

Answer 1

使用reversed（）向后逐行读取文件

textfile = open("todo.txt")
lines = textfile.readlines()
for line in reversed(lines):
    print(line)