I'm wondering if there's an existing Python libary/technique for enforcing function interfaces/"contracts". Something like ABC but for functions.
E.g. An example with made-up syntax:
@implements(i_state_updater)
def my_update(position, state, forces):
...
return new_position, new_state
Where
@declare_interface
def i_state_updater(position, state, forces):
"""
:param position: ...
:returns: ....
"""
So that when I pass this function as an argument I can verify it, eg
def compute_trajectory(update_func, n_steps, initial_state):
"""
:param update_func: An i_state_updater
...
"""
assert update_func.implements(i_state_updater)
Python's existing abc module does something like this, but only for classes. Is there an equivalent out there for functions?
