Python Slot Machine
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In Python every class can have instance attributes. By default Pythonuses a dict to store an object’s instance attributes. This is reallyhelpful as it allows setting arbitrary new attributes at runtime.
However, for small classes with known attributes it might be abottleneck. The dict wastes a lot of RAM. Python can’t just allocatea static amount of memory at object creation to store all theattributes. Therefore it sucks a lot of RAM if you create a lot ofobjects (I am talking in thousands and millions). Still there is a wayto circumvent this issue. It involves the usage of __slots__ totell Python not to use a dict, and only allocate space for a fixed setof attributes. Here is an example with and without __slots__:
Without__slots__:
With__slots__:
The second piece of code will reduce the burden on your RAM. Some peoplehave seen almost 40 to 50% reduction in RAM usage by using thistechnique.
Python Slot Machine Program
On a sidenote, you might want to give PyPy a try. It does all of theseoptimizations by default.
Below you can see an example showing exact memory usage with and without __slots__ done in IPython thanks to https://github.com/ianozsvald/ipython_memory_usage
Monty Python Slot Machine
| import random |
| print(''Welcome to the Slot Machine Simulator |
| You'll start with $50. You'll be asked if you want to play. |
| Answer with yes/no. you can also use y/n |
| No case sensitivity in your answer. |
| For example you can answer with YEs, yEs, Y, nO, N. |
| To win you must get one of the following combinations: |
| BARtBARtBARttpayst$250 |
| BELLtBELLtBELL/BARtpayst$20 |
| PLUMtPLUMtPLUM/BARtpayst$14 |
| ORANGEtORANGEtORANGE/BARtpayst$10 |
| CHERRYtCHERRYtCHERRYttpayst$7 |
| CHERRYtCHERRYt -ttpayst$5 |
| CHERRYt -t -ttpayst$2 |
| '') |
| #Constants: |
| INIT_STAKE = 50 |
| ITEMS = ['CHERRY', 'LEMON', 'ORANGE', 'PLUM', 'BELL', 'BAR'] |
| firstWheel = None |
| secondWheel = None |
| thirdWheel = None |
| stake = INIT_STAKE |
| def play(): |
| global stake, firstWheel, secondWheel, thirdWheel |
| playQuestion = askPlayer() |
| while(stake != 0 and playQuestion True): |
| firstWheel = spinWheel() |
| secondWheel = spinWheel() |
| thirdWheel = spinWheel() |
| printScore() |
| playQuestion = askPlayer() |
| def askPlayer(): |
| '' |
| Asks the player if he wants to play again. |
| expecting from the user to answer with yes, y, no or n |
| No case sensitivity in the answer. yes, YeS, y, y, nO . . . all works |
| '' |
| global stake |
| while(True): |
| answer = input('You have $' + str(stake) + '. Would you like to play? ') |
| answer = answer.lower() |
| if(answer 'yes' or answer 'y'): |
| return True |
| elif(answer 'no' or answer 'n'): |
| print('You ended the game with $' + str(stake) + ' in your hand.') |
| return False |
| else: |
| print('wrong input!') |
| def spinWheel(): |
| '' |
| returns a random item from the wheel |
| '' |
| randomNumber = random.randint(0, 5) |
| return ITEMS[randomNumber] |
| def printScore(): |
| '' |
| prints the current score |
| '' |
| global stake, firstWheel, secondWheel, thirdWheel |
| if((firstWheel 'CHERRY') and (secondWheel != 'CHERRY')): |
| win = 2 |
| elif((firstWheel 'CHERRY') and (secondWheel 'CHERRY') and (thirdWheel != 'CHERRY')): |
| win = 5 |
| elif((firstWheel 'CHERRY') and (secondWheel 'CHERRY') and (thirdWheel 'CHERRY')): |
| win = 7 |
| elif((firstWheel 'ORANGE') and (secondWheel 'ORANGE') and ((thirdWheel 'ORANGE') or (thirdWheel 'BAR'))): |
| win = 10 |
| elif((firstWheel 'PLUM') and (secondWheel 'PLUM') and ((thirdWheel 'PLUM') or (thirdWheel 'BAR'))): |
| win = 14 |
| elif((firstWheel 'BELL') and (secondWheel 'BELL') and ((thirdWheel 'BELL') or (thirdWheel 'BAR'))): |
| win = 20 |
| elif((firstWheel 'BAR') and (secondWheel 'BAR') and (thirdWheel 'BAR')): |
| win = 250 |
| else: |
| win = -1 |
| stake += win |
| if(win > 0): |
| print(firstWheel + 't' + secondWheel + 't' + thirdWheel + ' -- You win $' + str(win)) |
| else: |
| print(firstWheel + 't' + secondWheel + 't' + thirdWheel + ' -- You lose') |
| play() |
commented Dec 14, 2015
Monty Python Slot Machine
Instead of; Do; |
commented Jun 2, 2017
Monty Python Slot Machine Free Play
I run it on python 2 ,it's need to modify the 43 line (input -> raw_input) |