python if + else if 语句

Question

我是python新手，所以请帮忙，我不太了解。

我正在做一个请求命令的项目，如果命令是 = “帮助”，那么它会说明如何使用该程序。我似乎无法做到这一点，每次我尝试使用 if 语句时，它仍然会打印帮助部分，无论该命令是否存在。

示例：有人输入了脚本中不存在的命令，它仍会打印帮助部分。

print("welcome, to use this, please input the options below")
print ("help  |  exit")


option = input("what option would you like to use? ")

if help:
    print("this is a test, there will be an actual help section soon.")
else:
    print("no such command")
    

Answer 1

使用==相等运算符检查

print("welcome, to use this, please input the options below")
print("help  |  exit")


option = input("what option would you like to use? ")

if option == "help":
    print("this is a test, there will be an actual help section soon.")
else:
    print("no such command")

Answer 2

您需要在if 语句中引用您的变量option 才能使其工作。

print("welcome, to use this, please input the options below")
print ("help  |  exit")


option = input("what option would you like to use? ")

if option == "help":
    print("this is a test, there will be an actual help section soon.")
else:
    print("no such command")

我也是刚开始接触 Python，希望我们都能从这里学到很多东西。

Answer 3

试试这个。

 `print("welcome, to use this, please input the options below")
print ("help  |  exit")


option = input("what option would you like to use? ")

if option == "help":
    print("this is a test, there will be an actual help section soon.")
else:
    print("no such command")`