9.2 KiB
9.2 KiB
tic-tac-toe
This silly little repo showcases the stupid amount of effort I put into a python course.
You can see in the full spec it just wanted me to write out four silly little functions, but that's not what I did. Because I was trying to be thorough and not hardcode anything.
I ended up hardcoding the display and logic for who wins, along with poor detection for ties.
Way way way more effort than it was worth and I don't even think it'll get accepted lol.
Plot twist: You didn't have to do it at all!!!
Running the program
uhh...okay I guess?
Just download main.py and run py main.py on Windows or ./main.py on Linux
The specific instructions
It did NOT tell me to make classes or anything, it just wanted simple programming
Scenario
Your task is to write a simple program which pretends to play tic-tac-toe with the user. To make it all easier for you, we've decided to simplify the game. Here are our assumptions:
- the computer (i.e., your program) should play the game using
'X's; - the user (e.g., you) should play the game using
'O's; - the first move belongs to the computer − it always puts its first
'X'in the middle of the board; - all the squares are numbered row by row starting with
1(see the example session below for reference) - the user inputs their move by entering the number of the square they choose − the number must be valid, i.e., it must be an integer, it must be greater than
0and less than10, and it cannot point to a field which is already occupied; - the program checks if the game is over − there are four possible verdicts: the game should continue, the game ends with a tie, you win, or the computer wins;
- the computer responds with its move and the check is repeated;
- don't implement any form of artificial intelligence − a random field choice made by the computer is good enough for the game.
The example session with the program may look as follows:
+-------+-------+-------+
| | | |
| 1 | 2 | 3 |
| | | |
+-------+-------+-------+
| | | |
| 4 | X | 6 |
| | | |
+-------+-------+-------+
| | | |
| 7 | 8 | 9 |
| | | |
+-------+-------+-------+
Enter your move: 1
+-------+-------+-------+
| | | |
| O | 2 | 3 |
| | | |
+-------+-------+-------+
| | | |
| 4 | X | 6 |
| | | |
+-------+-------+-------+
| | | |
| 7 | 8 | 9 |
| | | |
+-------+-------+-------+
+-------+-------+-------+
| | | |
| O | X | 3 |
| | | |
+-------+-------+-------+
| | | |
| 4 | X | 6 |
| | | |
+-------+-------+-------+
| | | |
| 7 | 8 | 9 |
| | | |
+-------+-------+-------+
Enter your move: 8
+-------+-------+-------+
| | | |
| O | X | 3 |
| | | |
+-------+-------+-------+
| | | |
| 4 | X | 6 |
| | | |
+-------+-------+-------+
| | | |
| 7 | O | 9 |
| | | |
+-------+-------+-------+
+-------+-------+-------+
| | | |
| O | X | 3 |
| | | |
+-------+-------+-------+
| | | |
| 4 | X | X |
| | | |
+-------+-------+-------+
| | | |
| 7 | O | 9 |
| | | |
+-------+-------+-------+
Enter your move: 4
+-------+-------+-------+
| | | |
| O | X | 3 |
| | | |
+-------+-------+-------+
| | | |
| O | X | X |
| | | |
+-------+-------+-------+
| | | |
| 7 | O | 9 |
| | | |
+-------+-------+-------+
+-------+-------+-------+
| | | |
| O | X | X |
| | | |
+-------+-------+-------+
| | | |
| O | X | X |
| | | |
+-------+-------+-------+
| | | |
| 7 | O | 9 |
| | | |
+-------+-------+-------+
Enter your move: 7
+-------+-------+-------+
| | | |
| O | X | X |
| | | |
+-------+-------+-------+
| | | |
| O | X | X |
| | | |
+-------+-------+-------+
| | | |
| O | O | 9 |
| | | |
+-------+-------+-------+
You won!
Requirements
Implement the following features:
- the board should be stored as a three-element list, while each element is another three-element list (the inner lists represent rows) so that all of the squares may be accessed using the following syntax:
board[row][column]
each of the inner list's elements can contain 'O', 'X', or a digit representing the square's number (such a square is considered free) the board's appearance should be exactly the same as the one presented in the example. implement the functions defined for you in the editor.
Drawing a random integer number can be done by utilizing a Python function called randrange(). The example program below shows how to use it (the program prints ten random numbers from 0 to 8).
[!NOTE] the from-import instruction provides access to the randrange function defined within an external Python module callled random.
from random import randrange
for i in range(10):
print(randrange(8))
def display_board(board):
# The function accepts one parameter containing the board's current status
# and prints it out to the console.
def enter_move(board):
# The function accepts the board's current status, asks the user about their move,
# checks the input, and updates the board according to the user's decision.
def make_list_of_free_fields(board):
# The function browses the board and builds a list of all the free squares;
# the list consists of tuples, while each tuple is a pair of row and column numbers.
def victory_for(board, sign):
# The function analyzes the board's status in order to check if
# the player using 'O's or 'X's has won the game
def draw_move(board):
# The function draws the computer's move and updates the board.
Their solution
from random import randrange
def display_board(board):
print("+-------" * 3,"+", sep="")
for row in range(3):
print("| " * 3,"|", sep="")
for col in range(3):
print("| " + str(board[row][col]) + " ", end="")
print("|")
print("| " * 3,"|",sep="")
print("+-------" * 3,"+",sep="")
def enter_move(board):
ok = False # fake assumption - we need it to enter the loop
while not ok:
move = input("Enter your move: ")
ok = len(move) == 1 and move >= '1' and move <= '9' # is user's input valid?
if not ok:
print("Bad move - repeat your input!") # no, it isn't - do the input again
continue
move = int(move) - 1 # cell's number from 0 to 8
row = move // 3 # cell's row
col = move % 3 # cell's column
sign = board[row][col] # check the selected square
ok = sign not in ['O','X']
if not ok: # it's occupied - to the input again
print("Field already occupied - repeat your input!")
continue
board[row][col] = 'O' # set '0' at the selected square
def make_list_of_free_fields(board):
free = []
for row in range(3): # iterate through rows
for col in range(3): # iterate through columns
if board[row][col] not in ['O','X']: # is the cell free?
free.append((row,col)) # yes, it is - append new tuple to the list
return free
def victory_for(board,sgn):
if sgn == "X": # are we looking for X?
who = 'me' # yes - it's computer's side
elif sgn == "O": # ... or for O?
who = 'you' # yes - it's our side
else:
who = None # we should not fall here!
cross1 = cross2 = True # for diagonals
for rc in range(3):
if board[rc][0] == sgn and board[rc][1] == sgn and board[rc][2] == sgn: # check row rc
return who
if board[0][rc] == sgn and board[1][rc] == sgn and board[2][rc] == sgn: # check column rc
return who
if board[rc][rc] != sgn: # check 1st diagonal
cross1 = False
if board[2 - rc][2 - rc] != sgn: # check 2nd diagonal
cross2 = False
if cross1 or cross2:
return who
return None
def draw_move(board):
free = make_list_of_free_fields(board) # make a list of free fields
cnt = len(free)
if cnt > 0:
this = randrange(cnt)
row, col = free[this]
board[row][col] = 'X'
board = [ [3 * j + i + 1 for i in range(3)] for j in range(3) ]
board[1][1] = 'X' # set first 'X' in the middle
free = make_list_of_free_fields(board)
human_turn = True # which turn is it now?
while len(free):
display_board(board)
if human_turn:
enter_move(board)
victor = victory_for(board,'O')
else:
draw_move(board)
victor = victory_for(board,'X')
if victor != None:
break
human_turn = not human_turn
free = make_list_of_free_fields(board)
display_board(board)
if victor == 'you':
print("You won!")
elif victor == 'me':
print("I won")
else:
print("Tie!")