rt-generic 0.1

tools to make typing more consistent in older versions of python3, and access generic variables at runtime

RT-Generic

RT-Generic is a typed python module to make accessing the actual runtime types from a generic module more straight forward. The process is as follows:

• Declare your generic class (shown "old style and new style"), adding RTGeneric as a base class

# import stuff you need from types, typing, and/or typing_extensions

from rt_generic import * # deliberately not much
T = TypeVar('T')
U = TypeVar('U')
class MyClass(Generic[T,U], RTGeneric):

or

# import stuff you need from types, typing, and/or typing_extensions

from rt_generic import * # deliberately not much
class MyClass[T,U](RTGeneric):

• In the body of your class, if you need to behave differently based on the type of one of the generic types, you can access it's type in a class method

	@classmethod
	def cls_method(cls, argv) :
		T_type = cls.tv2type(MyClass,T) # type: ignore[misc] # mypy doesn't want T here
		if cls.generic_true(MyClass,U) # type: ignore[misc] # Was U set to TrueT (Literal type defined in rt-generic)
		...

or an instance method:

	def method(self, argv) :
		T_type = self.tv2type(MyClass,T) # type: ignore[misc] # mypy doesn't want T here
		if self.generic_true(MyClass,U) # type: ignore[misc] # Was U set to TrueT (Literal type defined in rt-generic)
		...

• Finally, RTGeneric relies on there being an explicit declartion of the non-generic particlar class(es)

class B_Class(MyClass[float,FalseT]):
	pass
	
class C_Class(MyClass[list[int],TrueT]):
	pass