Question

我正在聊天机器人中创建一个功能，该功能会更改机器人代理名称。我在顶部声明了该机器人的名称。

bot = "Bot"

然后我创建一个函数，该函数接收用户的输入并更改bot的名称

    elif "c-a" in inp:
        settt = True
        print(f"Choose agent(1-7):", end=' ')
        while settt:
            s_c = input()

            try:
                s = int(s_c)
            except ValueError:
                s = str(s_c)

            sv = type(s)

            if sv is int:
                if s == 1:
                    bot = "Bhaskar"
                    return bot
                elif s == 2:
                    bot = "Divya"
                    return bot
                elif s == 3:
                    bot = "Nayan"
                    return bot
                elif s == 4:
                    bot = "Sruti"
                    return bot
                elif s == 5:
                    bot = "Gagan"
                    return bot
                elif s == 6:
                    bot = "Ruchi"
                    return bot
                elif s == 7:
                    bot = "Abhishek"
                    return bot
                else:
                    a()
                    print("I didn't get it. Chose between 1 to 7 or type /h for help & /q for discard")
                    q()
            else:
                if s == "/h":
                    bot_list()
                elif s == "/q":
                    settt = False
                else:
                    a()
                    print("I didn't get it. Chose between 1 to 7 or type /h for help & /q for discard")
                    q()

但是机器人的价值保持不变。它不会改变。

Answer 1

这是因为变量bot是全局变量。在if else语句之前的函数内部添加此行

global bot

所以代码看起来像这样：

bot = "bot"

def name():
    global bot
    #if else statements begin here

Answer 2

您应该在函数中添加global bot行。但是我建议避免使用全局变量。我认为您应该将其作为参数并返回更改后的变量。

def your_function(param=None):
    ... Some code (Here you can use the value of bot variable which name is param inside this function.) ...
    return param
bot = your_function(param=bot)

这意味着您用函数的返回值覆盖了bot变量。

一个例子：

bot = 5
print("Before function: %s" % bot)
def your_function(param=None):
    param = param*2
    return param
bot = your_function(param=bot)
print("After function: %s" % bot)

输出：

python test.py 
Before function: 5
After function: 10

如何在if语句中更改变量的值并在python中全部应用

2 个答案: