#!/usr/bin/env python


class MonadLisa:
    """A Monad-ish structure containing the Mona Lisa."""

    def __init__(self, func):
        """Set Mona Lisa inner state, execute function."""

        self._mona = """
            ____
            o8%8888,
        o88%8888888.
        8'-    -:8888b
        8'         8888
        d8.-=. ,==-.:888b
        >8 `~` :`~' d8888
        88         ,88888
        88b. `-~  ':88888
        888b  --' .:88888
        88888o--:':::8888
        `88888| :::' 8888b
        8888^^'       8888b
    d888           ,%888b.
    d88%            %%%8--'-.
    /88:.__ ,       _%-' ---  -
        '''::===..-'   =  --.  `
        """
        self.error = None
        self.result = None
        self._run(func)

    def _run(self, func):
        """Run function on inner state, set result or error."""
        try:
            self.result = func(self._mona)
        except Exception as e:
            self.error = e


def run_examples():
    """Examples of the MonadLisa class."""
    print("Monad Lisa examples")
    print("Each run instantiates a MonadLisa")
    print("and gives it a different function")

    print("\nm1 is the built-in 'print', causing below side effect")
    m1 = MonadLisa(print)
    print("m1 error:", m1.error)
    print("m1 result:", m1.result)

    print("\nm2 is the identity function")
    m2 = MonadLisa(lambda x: x)
    print("m2 error:", m2.error)
    print("m2 result:", m2.result)

    print("\nm3 is the built-in 'abs'")
    m3 = MonadLisa(abs)
    print("m3 error:", m3.error)
    print("m3 result:", m3.result)

run_examples()