錯誤; 字符串索引必須是整數，很確定這些值是整數

Question

賦值就是寫一段代碼，返回字符串的后半部分。 得到一個錯誤說索引必須是整數，但我似乎無法弄清楚問題出在哪里。感謝幫助

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

你錯誤地使用了切片。 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:])