Python如何即时更改变量的值 [英] Python how to change the value of a variable on the fly

问题描述

现在，我正在处理具有以下信息的.txt文件:

Right now i am working with a file .txt with this information:

["corrector", "Enabled"]
["Inteligencia", "Enabled"]

然后在我的python程序中，它以这种方式从一开始就加载该数据:

Then in my python program it loads that data at the very beggining, this way:

for line in open("menu.txt", 'r'):
  retrieved = json.loads(line)
  if retrieved[0] == "corrector":
    corrector = retrieved[1]
  if retrieved[0] == "Inteligencia":
    Inteligencia = retrieved[1]

到目前为止，它的工作原理是完美的，但是因为它是针对聊天机器人的，所以我希望可以直接从聊天中更改该变量的值，并且当我从聊天室中调用！启用校正器"时，我尝试了此代码聊天.

So far it works perfect, however as this is for a chat bot, i want to make possible to change the value of that variables directly from the chat, and i tried this code when i call "!Enable corrector" from the chat.

  if corrector == "Enabled":
    room.message("ERROR: Already Enabled")
  else:
    data = []
    with open('menu.txt', 'r+') as f:
      for line in f:
        data_line = json.loads(line)
        if data_line[0] == "corrector": 
          data_line[1] = "Enabled"
        data.append(data_line)
      f.seek(0)
      f.writelines(["%s\n" % json.dumps(i) for i in data])
      f.truncate()
    room.message("corrector enabled")

这也有效，如果我打开.txt文件，我可以看到它已经更改的值.真正的问题是python似乎并未接受我更改了变量，并且它仍然认为它已启用"，而仍被禁用".直到我重新启动程序，它才会将变量读取为已启用".

That also works, and if i open the .txt file i can see the value it's already changed. The real problem is that python didn't seem to accept that i changed a variable, and it still thinks it's "disabled" while it's already "enabled". It won't read the variable as "enabled" until i restart the program.

我想知道是否有用于变量的刷新选项或一种变通方法，可以随时更改变量的值并保持效果而无需重新启动.

I was wondering if there is a refresh option for variables or a workaround to change the value of a variables on the fly and make the effect lasts without a restart.

推荐答案

随时更改变量的值

change the value of a variables on the fly

此代码可随时更改变量的值:

This code changes the value of a variable on the fly:

a = 1
a = 2

您的问题建议您希望能够通过计算出的名称查找值.解决方法是使用dict:

Your question suggests that you want to be able to look up a value by a calculated name. The solution is to use a dict:

mydict = {'corrector':0}
mydict['corrector'] = 1

如果要更改文件中的值，则需要根据所拥有的数据写出新文件.看来您正在加载json，所以json模块将帮助您解决这一问题.

If you want to change the values in the file, you'll need to write out a new file based on the data you have. It looks like you're loading json, so the json module will help you out with that.

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