在Python脚本中未实现elif语句

Question

在下面的代码中，if语句已到达并运行良好。然而，elif的声明似乎没有任何效果。当脚本运行时，当elif语句的条件满足时，什么都不会发生，当我按两次返回按钮时，脚本只是继续跳过elif语句。

我的代码：

print("If you want to name this window press 1, if you want to describe it press 2")
if input() == "1":
print("Please enter this window's title:")
current_window_title = input()
print("Do you also want to describe this window? P.S: You can do this later.)")
if input().lower() == "yes":
print("Please enter this window's description:")
current_window_description = input()
else:
current_window_description = "None"
elif input() == "2":
print("Please enter this window's description:")
current_window_description = input()
print("Do you also want to give this window a title? P.S: You can do this later.")
if input().lower() == "yes":
print("Please enter this window's title:")
current_window_title = input()

Answer 1

代码中有太多不需要的input()语句，导致它突然工作

此外，由于python的input((函数也具有打印功能，因此可以将print()和input()组合为一个语句

所有修改如下：

Input = input("If you want to name this window press 1, if you want to describe it press 2")
if Input == "1":
current_window_title = input("Please enter this window's title:")
if input("Do you also want to describe this window? P.S: You can do this later.)").lower() == "yes":
current_window_description = input("Please enter this window's description:")
else:
current_window_description = "None"

elif Input == "2":
current_window_description = input("Please enter this window's description:")
if input("Do you also want to give this window a title? P.S: You can do this later.").lower() == "yes":
current_window_title = input("Please enter this window's title:")

Answer 2

如果elif-else块。

answer=input("If you want to name this window press 1, if you want to describe it press 2:")
if answer == "1":
Code section 1
elif answer=="2":
Code section 2
else : 
print ("wrong command")

Answer 3

如果想要达到2，您的代码会要求输入两次。第一次，它会要求输入，在if语句中，你会输入2，但它不匹配。第二次它要求输入时，您在elif语句中，它就会工作。

最好先得到输入的结果，然后再对其进行评估

print("If you want to name this window press 1, if you want to describe it press 2")
result = input()
if result == "1":
print("Please enter this window's title:")
current_window_title = input()
print("Do you also want to describe this window? P.S: You can do this later.)")
if input().lower() == "yes":
print("Please enter this window's description:")
current_window_description = input()
else:
current_window_description = "None"
elif result == "2":
print("Please enter this window's description:")
current_window_description = input()
print("Do you also want to give this window a title? P.S: You can do this later.")
if input().lower() == "yes":
print("Please enter this window's title:")
current_window_title = input()

Answer 4

您需要将用户输入的初始input()移动到if和elif语句之外，以便将它们与相同的值进行比较。目前，elif将永远不会捕获"0"的输入；2〃；，除非你输入第二个输入(再次输入"2"(。试试这样的东西。

print("If you want to name this window press 1, if you want to describe it press 2")
user_input = input()
if user_input == "1":
print("Please enter this window's title:")
current_window_title = input()
print("Do you also want to describe this window? P.S: You can do this later.)")
if input().lower() == "yes":
print("Please enter this window's description:")
current_window_description = input()
else:
current_window_description = "None"
elif user_input == "2":
print("Please enter this window's description:")
current_window_description = input()
print("Do you also want to give this window a title? P.S: You can do this later.")
if input().lower() == "yes":
print("Please enter this window's title:")
current_window_title = input()

Answer 5

因为你从用户那里得到了一个输入，并且在相同的范围内，如果和这个数量的输入在elif中不可用，你可以做这两件事，它将正常工作：

print("If you want to name this window press 1, if you want to describe it press 2")
inp = input()
if inp == "1":
print("Please enter this window's title:")
current_window_title = input()
print("Do you also want to describe this window? P.S: You can do this later.)")
if input().lower() == "yes":
print("Please enter this window's description:")
current_window_description = input()
else:
current_window_description = "None"
elif inp == "2":
print("Please enter this window's description:")
current_window_description = input()
print("Do you also want to give this window a title? P.S: You can do this later.")
if input().lower() == "yes":
print("Please enter this window's title:")
current_window_title = input()

或：

print("If you want to name this window press 1, if you want to describe it press 2")
if input() == "1":
print("Please enter this window's title:")
current_window_title = input()
print("Do you also want to describe this window? P.S: You can do this later.)")
if input().lower() == "yes":
print("Please enter this window's description:")
current_window_description = input()
else:
current_window_description = "None"
if input() == "2":
print("Please enter this window's description:")
current_window_description = input()
print("Do you also want to give this window a title? P.S: You can do this later.")
if input().lower() == "yes":
print("Please enter this window's title:")
current_window_title = input()