Question

我是python的新手，我无法弄清楚这个问题，我为字符串设置了if和elif，因此，如果他们的“心情”不好/不好/不好，它将执行一组指令，但是那没发生。我试图找到问题，但没有。代码如下：

import time

name = input("Hello! Whats your name: ")

mood = input("Hello, " + name + " how are you feeling today? ")

if mood.find("good"):
  time.sleep(0.3)
  print("Thats awesome!")

elif mood.find("bad"):
  time.sleep(0.3)
  input("Oh, whats made you feel so down? ")
  print("Aww, thats ok.")

time.sleep(1)
activity = input("What are you doing today? ")

如果我为该语句输入好，它将执行我应该为坏语句得到的结果，如果我输入为错误，则表明该语句应该得到好处。

Answer 1

find()方法不返回布尔值。它返回找到句子的索引（如果找不到，则返回-1），因此，如果您说“ good”，它将在句子的索引0处看到它，但是由于条件需要布尔值，所以0被解释为False。 / p>

您可能想尝试一下：

if "good" in mood:
    time.sleep(0.3)
    print("Thats awesome!")

elif "bad" in mood:
    time.sleep(0.3)
    input("Oh, whats made you feel so down? ")
    print("Aww, thats ok.")

Answer 2

import time
name = input("Hello! Whats your name: ")

mood = input("Hello, " + name + " how are you feeling today? ")

if "good" in mood:
  time.sleep(0.3)
  print("Thats awesome!")
if "bad" in mood:
  time.sleep(0.3)
  input("Oh, whats made you feel so down? ")
  print("Aww, thats ok.")

time.sleep(1)
activity = input("What are you doing today? ")

Python if语句混淆

2 个答案: