How to return data from object function without accessing function object with dot-CodePudding

I have the following:

class JsonSerializable(object):
    def to_json(self):
        raise NotImplementedError


class InlineKeyboardMarkup(JsonSerializable):
    def __init__(self, inline_keyboard):
        self.inline_keyboard = inline_keyboard

    def to_json(self):
        obj = {'inline_keyboard': self.inline_keyboard}
        return json.dumps(obj)

I need the InlineKeyboardMarkup return without accessing .to_json() like this:

>>> InlineKeyboardMarkup(inline_keyboard=[])
... '{"inline_keyboard":[]}'

CodePudding user response：

If all you want is to display it in the repl loop, you can just override __repr__, which is called under the hood by print:

class InlineKeyboardMarkup(JsonSerializable):
    def __init__(self, inline_keyboard):
        self.inline_keyboard = inline_keyboard

    def to_json(self):
        obj = {'inline_keyboard': self.inline_keyboard}
        return json.dumps(obj)

    def __repr__(self):
        return repr(self.to_json())

CodePudding user response：

Using repr :

import json


class JsonSerializable(object):
    def to_json(self):
        raise NotImplementedError


class InlineKeyboardMarkup(JsonSerializable):
    def __init__(self, inline_keyboard):
        self.inline_keyboard = inline_keyboard

    def to_json(self):
        obj = {'inline_keyboard': self.inline_keyboard}
        return json.dumps(obj)

    def __repr__(self):
        return repr(self.to_json())


def test_inline_keyboard_markup():
    dic = r'{"inline_keyboard": [[{}, {}], [{}]]}'
    obj = InlineKeyboardMarkup(inline_keyboard=[[{}, {}], [{}]])
    assert obj == dic

pytest-3 object.py -vvv


ERROR collecting objects.py
objects.py:27: in <module>
    test_inline_keyboard_markup()
objects.py:24: in test_inline_keyboard_markup
    assert obj == dic
E   assert '{"inline_keyboard": [[{}, {}], [{}]]}' == '{"inline_keyboard": [[{}, {}], [{}]]}'

Interrupted: 1 errors during collection 
1 error in 0.58 seconds