implementing python decorators using functional programming

decorators_functional.py

import functools


@functools.partial(lambda wrapper: lambda logger: lambda func: lambda x, y: wrapper(logger, func, x, y))
def exec_with_param_logging(logger, func, x, y):
    print(f"{logger} calling in, inputs: {x}, {y}.")
    res = func(x, y)
    print(f"{logger} calling out, return: {res}.")
    return res


@exec_with_param_logging("main logger")
def add_nums_1(x, y):
    return x + y


add_nums_1(3, 5)
# derivation:
# exec_with_param_logging("main logger", add_nums_1, 3, 5)
# (lambda x, y: exec_with_param_logging("main logger", add_nums_1, x, y))(3, 5)
# (lambda func: lambda x, y: exec_with_param_logging("main logger", func, x, y))(add_nums_1)(3, 5)
# (lambda logger: lambda func: lambda x, y: exec_with_param_logging(logger, func, x, y))("main logger")(add_nums_1)(3, 5)
# (lambda wrapper: lambda logger: lambda func: lambda x, y: wrapper(logger, func, x, y))(exec_with_param_logging)("main logger")(add_nums_1)(3, 5)
# partial(lambda wrapper: lambda logger: lambda func: lambda x, y: wrapper(logger, func, x, y))(exec_with_param_logging)("main logger")(add_nums_1)(3, 5)