What simple way can I run python programs?

Question

My question is quite beginner level, excuse me. I use pycharm but I am open to other better suggestions according to my problem. I would like to run the code on the interpreter himself, but according to the book I practice, all the examples as one I will post right away, follow the different methodology than the one I was adapted to, it may be from me: Lack of custom; either the book has this proposal exactly as a challenge; or I am making a mockery of the reading. What bothers me and makes my learning difficult is the code being described in a file and the call of the methods etc... made in another, in the terminal (>>>). So all the while I’m forced to copy the code to the terminal.
- Example taken from the book Fluent Python (Luciano Ramalho).

import collections
from random import choice

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

class FrenchDeck:
    ranks =  [str(n) for n in range (2, 11)] + list ('JQKA')
    suits = 'spades diamonds clubs hearts'.split()
    suits_values = dict(spades=3, hearts=2, diamonds=1, clubs=0)

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


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

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

Here is how code is called to run;
Running:

>>> beer_dark = Card('7', 'diamonds')
>>> beer_card
Card(rank='7', suit='diamonds')

>>> deck = FrenchDeck()
>>> len(deck)
52

As the code grows, it either adds to the file or tweaks to the terminal. People, let me know if there is a practical way or need to adapt the code by incrementing parameters where there are not so that I can run it at once in the interpreter.