how to create class variable dynamically in python

Question

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         


        

Answer 1

If for any reason you can't use Raymond's answer of setting them up after the class creation then perhaps you could use a metaclass:

class MetaFoo(type):
    def __new__(mcs, classname, bases, dictionary):
        for name in dictionary.get('_extra_vars', ()):
            dictionary[name] = 0
        return type.__new__(mcs, classname, bases, dictionary)

class Foo(): # For python 3.x use 'class Foo(metaclass=MetaFoo):'
    __metaclass__=MetaFoo # For Python 2.x only
    _extra_vars = 'tx ty tz'.split()