Python 索引&for循环

索引

每当需要访问最后一个列表元素时，都可使用索引-1 。这在任何情况下都行之有效，即便你最后一次访问列表后，其长度发生了变化

motorcycles = ['honda', 'yamaha', 'suzuki']
print(motorcycles[-1])

result

suzuki

仅当列表为空时，这种访问最后一个元素的方式才会导致错误

超出数组边界导致索引错误
Traceback (most recent call last):
File “4839957.py”, line 2, in
print(motorcycles[3])
IndexError: list index out of range

Traceback(最近的调用):
文件"4839957.py"，第2行，在
打印(摩托车[3])
索引错误:列表索引超出范围

for循环

individuals = ['ZhangSan', 'LiSi', 'WangWu']
for individuals in individuals: 
    print(individuals.title() + ", he is an extraordinary undergraduate!")
    print("I can't wait to ask you for more details about you, " + individuals.title() + ".\n")

result

Zhangsan, he is an extraordinary undergraduate!
I can’t wait to ask you for more details about you, Zhangsan.

Lisi, he is an extraordinary undergraduate!
I can’t wait to ask you for more details about you, Lisi.

Wangwu, he is an extraordinary undergraduate!
I can’t wait to ask you for more details about you, Wangwu.