Use class as string [duplicate]

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

Community · Accepted Answer · 2021-01-18 12:34:40Z

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.

CommunityBot

11 silver badge

answered Feb 21, 2014 at 10:46

thefourtheye

241k53 gold badges466 silver badges505 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

which is the better way, yours or lanzz's?

BlackMamba · Accepted Answer · 2014-02-21 10:50:56Z

0

you can use eval function.

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

answered Feb 21, 2014 at 10:50

BlackMamba

10.3k8 gold badges47 silver badges70 bronze badges