错误;字符串索引必须是整数，非常确定值是整数

Question

赋值是写一段代码表示returns一个字符串的后半部分。得到这个说索引必须是整数的错误，但我似乎无法弄清楚问题在哪里 is.Help 受到赞赏

def last_half(sent):
    string_length = len(sent)
    if string_length / 2 == 0:
        s_half = int(string_length/2)
        print(sent[s_half,-1])
    elif string_length / 2 != 0:
        s_half = int(round(string_length/2))
        print(sent[s_half,-1])

Answer 1

您错误地使用了切片。看看https://www.pythoncentral.io/how-to-slice-listsarrays-and-tuples-in-python/

def last_half(sent):
    string_length = len(sent)
    if string_length / 2 == 0:
        s_half = int(string_length/2)
        print(sent[s_half:])
    elif string_length / 2 != 0:
        s_half = int(round(string_length/2))
        print(sent[s_half:])