How to create a __repr__ of a namedtuple?

How do I create a special method __repr__ where I can print, for example, '6 of spades' or 'Q of diamonds'?

How do I access the data from the namedtuple, keeping in mind that I have a list of namedtuples in self._cards?

import collections

cards = collections.namedtuple('Card', ['rank', 'suit'])

class Deck:
    ranks = [str(n) for n in range (2,11)] + list('JQKA')
    suits = 'spades diamonds hearts clubs'.split()

    def __init__(self):
        self._cards = [cards(rank, suit) for suit in self.suits for rank in self.ranks]

    def __len__(self):
        return len(self._cards)

    def __getitem__(self, item):
        return self._cards[item]

    def __repr__(self):
        return '%s of %s' % ()  # <-- don't know how to assign the string

b = ()
for i in b:

It seems like your issue right now is that you are trying to make the __repr__ method inside of your Deck class. That method will only get called when you are trying to print Deck objects, however it seems like you are trying to print a message for a single Card instead. You could solve this by making a simple Card class with suit and rank as class variables, and storing a list of Card objects in your deck. This way you could write a __repr__ method for the card class itself, and reference the card's suit and rank directly.

Bring namedtuple's __str__ and __repr__ behavior to regular , def nice_repr(obj): """ Decorator to bring namedtuple's __repr__ behavior I would have created a Parent Class with the definition of __repr__  Namedtuple in Python Python supports a type of container like dictionaries called “ namedtuples() ” present in module, “ collections “. Like dictionaries they contain keys that are hashed to a particular value.

You could use typing.NamedTuple instead, which allows you to define methods normally:

from typing import NamedTuple

class Card(NamedTuple):
    rank: str
    suit: str
    def __repr__(self):
        return "{} of {}".format(self.rank, self.suit)

how to control formatting of a namedtuple in a list, class Foo(namedtuple("Foo", "x")): def __repr__(self): return "foolish({})".format(​self.x) This will also affect the other forms - if you don't define  Create an object. Creating a namedtuple object is as straightforward as creating the class. What I also like is the representation of the namedtuple object. You can also customize it in your regular Python class by overwriting __repr__ method.

It would be clearer if you renamed cards to Card, since that's the name you assigned to that class:

Card = collections.namedtuple('Card', ['rank', 'suit'])

You can extend a namedtuple just like any other class, including to give it __repr__ method. You can even reuse the class name, since a class statement is a type of assignment:

class Card(Card):
    def __repr__(self):
        return f'{self.rank} of {self.suit}'

A more compact version would be

class Card(collections.namedtuple('Card', ['rank', 'suit'])):
    def __repr__(self):
        return f'{self.rank} of {self.suit}'

Understand how to use NamedTuple and Dataclass in Python, You can also customize it in your regular Python class by overwriting __repr__ method. Assigning attributes with a default  Python __repr__() function returns the object representation. It could be any valid python expression such as tuple, Python namedtuple. Next. Django Forms.

8.3. collections — High-performance container datatypes, Sequence, Sized, Iterable, Container, __getitem__, __contains__. by name 33 >>> p # readable __repr__ with a name=value style Point(x=11, Useful for introspection and for creating new named tuple types from existing named tuples. Is it possible to add a documentation string to a namedtuple in an easy manner? Yes, in several ways. Subclass typing.NamedTuple - Python 3.6+ As of Python 3.6 we can use a class definition with typing.NamedTuple directly, with a docstring (and annotations!):

Secret Recipes of the Python Ninja: Over 70 recipes that uncover , Using namedtuple, a developer can give meaning to each item in a tuple and field names, as well as creating a __repr__ method that automatically lists the  New in Python 3.6, we can use a class definition with typing.NamedTuple to create a namedtuple: from typing import NamedTuple class ANamedTuple(NamedTuple): """a docstring""" foo: int bar: str baz: list The above is the same as the below, except the above additionally has type annotations and a docstring.

Python namedtuple, Python namedtuple, python named tuple, namedtuple in python, Python namedtuple default values, dict Python __str__ and __repr__ We will create a few tuples and print their values to console. to 1, and 'c' will default to 2. module : If module is defined, the __module__ attribute of the named tuple is set to that value. The _make() method can be used to convert an iterable object like list, tuple, etc to NamedTuple object. We can also convert a dictionary type object to NamedTuple object. For this conversion, we need the ** operator. NamedTuple can return the values with keys as OrderedDict type object. To make it OrderedDict, we have to use the _asdict() method.