Use class as string

Question

I have the name of the class in string like this:

className = "MyClassName"

I have already imported the MyClassName in my model.

is there a way to use this:

Object = MyClassName()

making if else statment like this:

if className == "MyClassName":
    Object = MyClassName()
elif className == "MyClass2":
    Object = MyClass2()

I hope there is a better way

You could use `object = globals()[className]()` – lanzz Feb 21 '14 at 10:45 — lanzz, Feb 21 '14 at 10:45
The question is.. __Why__ do you want to do this? – aIKid Feb 21 '14 at 10:49 — aIKid, Feb 21 '14 at 10:49

score 3 · Accepted Answer · edited Jan 18 '21 at 12:34

3

You get the current module using sys.modules[__name__] and then get the class with getattr, like this

var = "MyClassName"
import sys
mod = sys.modules[__name__]
getattr(mod, var)()

globals()[var]()

classes = {"MyClassName": MyClassName, "MyClass2": MyClass2}

You can then use the classes dictionary to get the corresponding classes. I would prefer this way, particularly if the input comes from the user.

edited Jan 18 '21 at 12:34

Community

answered Feb 21 '14 at 10:46

thefourtheye

which is the better way, yours or lanzz's? – Marco Dinatsoli Feb 21 '14 at 10:49

score 0 · Answer 2 · answered Feb 21 '14 at 10:50

0

you can use eval function.

var = "MyClassName"
ob = eval(var + "()")

answered Feb 21 '14 at 10:50

BlackMamba

2 Answers2