CODEWITHSUNDEEP
python
Chris McKinnel
Chris McKinnel

Reputation: 15082

How to get class object from class name string in the same module?

I have a class

class Foo():
    def some_method():
        pass

And another class in the same module:

class Bar():
    def some_other_method():
        class_name = "Foo"
        # Can I access the class Foo above using the string "Foo"?

I want to be able to access the Foo class using the string "Foo".

I can do this if I'm in another module by using:

from project import foo_module
foo_class = getattr(foo_module, "Foo")

Can I do the same sort of thing in the same module?

The guys in IRC suggested I use a mapping dict that maps string class names to the classes, but I don't want to do that if there's an easier way.

Upvotes: 82

Views: 76222

Answers (3)

jh314
jh314

Reputation: 27792

You can do it with help of the sys module:

import sys

def str2Class(str):
    return getattr(sys.modules[__name__], str)

Upvotes: 12

khachik
khachik

Reputation: 28693

import sys
getattr(sys.modules[__name__], "Foo")

# or 

globals()['Foo']

Upvotes: 123

user2357112
user2357112

Reputation: 280688

globals()[class_name]

Note that if this isn't strictly necessary, you may want to refactor your code to not use it.

Upvotes: 9

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