how to create class variable dynamically in python
You can run the insertion code immediately after a class is created:
class Foo(): ...vars=('tx', 'ty', 'tz') # plus plenty morefor 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'
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()
Late to the party but use the type class constructor!
Foo = type("Foo", (), {k: 0 for k in ("tx", "ty", "tz")})