how to create class variable dynamically in python

python class class-variables
pawel picture pawel · Nov 29, 2011 · Viewed 26.3k times · Source

I need to make a bunch of class variables and I would like to do it by looping through a list like that:

vars=('tx','ty','tz') #plus plenty more

class Foo():
    for v in vars:
        setattr(no_idea_what_should_go_here,v,0)

is it possible? I don't want to make them for an instance (using self in the __init__) but as class variables.

Answer

Raymond Hettinger picture Raymond Hettinger · Nov 29, 2011

You can run the insertion code immediately after a class is created:

class Foo():
     ...

vars=('tx', 'ty', 'tz')  # plus plenty more
for v in vars:
    setattr(Foo, v, 0)

Also, you can dynamically store the variable while the class is being created:

class Bar:
    locals()['tx'] = 'texas'

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