from importlib import import_module

from importlib import resources

SOLUTION = dict()

def register_solution(func):

"""Decorator to register plug-ins"""

name = func.__module__

SOLUTION[name] = func

return func

def get_all_solutions():

_import_solutions()

return SOLUTION.values()

def __getattr__(name):

"""Return a named plugin"""

try:

return SOLUTION[name]

except KeyError:

_import_solutions()

if name in SOLUTION:

return SOLUTION[name]

else:

raise AttributeError(

f"module {__name__!r} has no attribute {name!r}"

) from None

def __dir__():

"""List available plug-ins"""

_import_solutions()

return list(SOLUTION.keys())

def _import_solutions():

"""Import all resources to register plug-ins"""

for name in resources.contents(__name__):

if name.endswith(".py"):

import_module(f"{__name__}.{name[:-3]}")