如何使用“exec”按名称选择变量

Question

I have an issue I am struggling to fix. I need to make an input that will allow the user to name a variable, but how would I then use this variable?

To make it I just have to do:

a = input('var name?')
exec(a) 

So if the user enters 'dog' that will be a variable called dog , but how do I then use this variable? I don't have its name so is it even possible?

Additionally, how do I make it a global variable if it's in a function? Sorry about my bad grammar and English. I am not really sure what to try.

Answer 1

So, you can do this, but I'm not sure why you would. Whatever you do, don't use exec for the reasons brought up by Tagc in the comments.

>>> a = input('var name? ')
var name? dog
>>> globals()[a] = 'hi everyone'
>>> dog
'hi everyone'

And you do have the name, it's in a , and you can access it in globals() :

>>> globals()[a]
'hi everyone'
>>>

But this just brings the point home: why not just use a dict instead of the globals() dict ?