"""Maze Runner 2D, by Al Sweigart al@inventwithpython.com
Move around a maze and try to escape. Maze files are generated by
mazemakerrec.py.
This code is available at https://nostarch.com/big-book-small-python-programming
Tags: large, game, maze"""
import sys, os
# Maze file constants:
WALL = '#'
EMPTY = ' '
START = 'S'
EXIT = 'E'
PLAYER = '@' # (!) Try changing this to '+' or 'o'.
BLOCK = chr(9617) # Character 9617 is '░'
def displayMaze(maze):
# Display the maze:
for y in range(HEIGHT):
for x in range(WIDTH):
if (x, y) == (playerx, playery):
print(PLAYER, end='')
elif (x, y) == (exitx, exity):
print('X', end='')
elif maze[(x, y)] == WALL:
print(BLOCK, end='')
else:
print(maze[(x, y)], end='')
print() # Print a newline after printing the row.
print('''Maze Runner 2D, by Al Sweigart al@inventwithpython.com
(Maze files are generated by mazemakerrec.py)''')
# Get the maze file's filename from the user:
while True:
print('Enter the filename of the maze (or LIST or QUIT):')
filename = input('> ')
# List all the maze files in the current folder:
if filename.upper() == 'LIST':
print('Maze files found in', os.getcwd())
for fileInCurrentFolder in os.listdir():
if (fileInCurrentFolder.startswith('maze') and
fileInCurrentFolder.endswith('.txt')):
print(' ', fileInCurrentFolder)
continue
if filename.upper() == 'QUIT':
sys.exit()
if os.path.exists(filename):
break
print('There is no file named', filename)
# Load the maze from a file:
mazeFile = open(filename)
maze = {}
lines = mazeFile.readlines()
playerx = None
playery = None
exitx = None
exity = None
y = 0
for line in lines:
WIDTH = len(line.rstrip())
for x, character in enumerate(line.rstrip()):
assert character in (WALL, EMPTY, START, EXIT), 'Invalid character at column {}, line {}'.format(x + 1, y + 1)
if character in (WALL, EMPTY):
maze[(x, y)] = character
elif character == START:
playerx, playery = x, y
maze[(x, y)] = EMPTY
elif character == EXIT:
exitx, exity = x, y
maze[(x, y)] = EMPTY
y += 1
HEIGHT = y
assert playerx != None and playery != None, 'No start in maze file.'
assert exitx != None and exity != None, 'No exit in maze file.'
while True: # Main game loop.
displayMaze(maze)
while True: # Get user move.
print(' W')
print('Enter direction, or QUIT: ASD')
move = input('> ').upper()
if move == 'QUIT':
print('Thanks for playing!')
sys.exit()
if move not in ['W', 'A', 'S', 'D']:
print('Invalid direction. Enter one of W, A, S, or D.')
continue
# Check if the player can move in that direction:
if move == 'W' and maze[(playerx, playery - 1)] == EMPTY:
break
elif move == 'S' and maze[(playerx, playery + 1)] == EMPTY:
break
elif move == 'A' and maze[(playerx - 1, playery)] == EMPTY:
break
elif move == 'D' and maze[(playerx + 1, playery)] == EMPTY:
break
print('You cannot move in that direction.')
# Keep moving in this direction until you encounter a branch point.
if move == 'W':
while True:
playery -= 1
if (playerx, playery) == (exitx, exity):
break
if maze[(playerx, playery - 1)] == WALL:
break # Break if we've hit a wall.
if (maze[(playerx - 1, playery)] == EMPTY
or maze[(playerx + 1, playery)] == EMPTY):
break # Break if we've reached a branch point.
elif move == 'S':
while True:
playery += 1
if (playerx, playery) == (exitx, exity):
break
if maze[(playerx, playery + 1)] == WALL:
break # Break if we've hit a wall.
if (maze[(playerx - 1, playery)] == EMPTY
or maze[(playerx + 1, playery)] == EMPTY):
break # Break if we've reached a branch point.
elif move == 'A':
while True:
playerx -= 1
if (playerx, playery) == (exitx, exity):
break
if maze[(playerx - 1, playery)] == WALL:
break # Break if we've hit a wall.
if (maze[(playerx, playery - 1)] == EMPTY
or maze[(playerx, playery + 1)] == EMPTY):
break # Break if we've reached a branch point.
elif move == 'D':
while True:
playerx += 1
if (playerx, playery) == (exitx, exity):
break
if maze[(playerx + 1, playery)] == WALL:
break # Break if we've hit a wall.
if (maze[(playerx, playery - 1)] == EMPTY
or maze[(playerx, playery + 1)] == EMPTY):
break # Break if we've reached a branch point.
if (playerx, playery) == (exitx, exity):
displayMaze(maze)
print('You have reached the exit! Good job!')
print('Thanks for playing!')
sys.exit()