Part of a tutorial of programming Load Runner in Python, this code shows the evolution to creating a simple game in the language that should be able to run on Windows. The original code was supposed to run on Linux, but this recipe takes the idea in another direction and shows that programs can be created incrementally. Please note the various file divisions: load1, load2, load3, load4, load5, and Extended Demo (Sound).
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# load1.py
##########
import boards
import util
import time
def main():
screen = util.Screen(boards.boards[0])
screen.update()
time.sleep(2)
row, col = 1, 9
while True:
character = screen.read(row, col)
if character == '_' or character == '*':
col += 1
elif character == '|':
row -= 1
elif character == ' ':
if screen.read(row + 1, col) == '|':
col += 1
else:
row += 1
else:
break
screen.write(row, col, '^')
screen.update()
time.sleep(.1)
screen.update()
time.sleep(2)
if __name__ == '__main__':
main()
##########
# load2.py
##########
import boards
import util
import time
import ttyWindows
################################################################################
class Player:
def __init__(self, screen, row=0, column=9, face='^'):
self.screen = screen
self.row = row
self.column = column
self.face = face[0]
self.direction = 0, 0
def setDirection(self, key):
if key == '\xE0H':
self.direction = 0, -1
elif key == '\xE0P':
self.direction = 0, +1
elif key == '\xE0K':
self.direction = -1, 0
elif key == '\xE0M':
self.direction = +1, 0
def move(self):
character = self.screen.read(self.row, self.column)
x, y = self.direction
if character == '_' or character == '*':
self.column += x
elif character == '|':
self.row += y
elif character == ' ':
if self.screen.read(self.row + 1, self.column) != '|' or y == 1:
self.row += 1
else:
self.column += x
self.screen.write(self.row, self.column, self.face)
################################################################################
def main():
screen = util.Screen(boards.boards[0])
screen.update()
player = Player(screen)
while screen.read(player.row, player.column):
time.sleep(.1)
key = ttyWindows.readLookAhead()
player.setDirection(key)
player.move()
screen.update()
time.sleep(2)
if __name__ == '__main__':
main()
##########
# load3.py
##########
import boards
import util
import time
import ttyWindows
################################################################################
class Player:
def __init__(self, screen, face, row=1, column=10):
self.screen = screen
self.face = face
self.row = row
self.column = column
self.vector = 0, 0
def move(self):
global playing, you
string = self.screen.read(self.row, self.column)
left = self.screen.read(self.row, self.column - 1)
right = self.screen.read(self.row, self.column + 1)
x, y = self.vector
x_move = False
if string == '_':
self.column += x
x_move = True
elif string == '|':
self.row += y
elif string == ' ':
if self.screen.read(self.row + 1, self.column) != '|' or y == 1:
self.row += 1
else:
self.column += x
if not x_move:
if left == '_' and x == -1:
self.column -= 1
elif right == '_' and x == 1:
self.column += 1
self.screen.write(self.row, self.column, self.face)
if self is you and self.screen.read(self.row, self.column) is None:
playing = False
################################################################################
class You(Player):
def setDirection(self, key):
if key == '\xE0H':
self.vector = 0, -1
elif key == '\xE0P':
self.vector = 0, +1
elif key == '\xE0K':
self.vector = -1, 0
elif key == '\xE0M':
self.vector = +1, 0
class Robot(Player):
def setDirection(self, key):
global playing, you
if you.row == self.row and you.column == self.column:
playing = False
if self.row == you.row:
if self.column > you.column:
self.vector = -1, 0
else:
self.vector = +1, 0
else:
context = self.screen.read(self.row, self.column)
if context == '|':
if self.row > you.row:
self.vector = 0, -1
elif self.row < you.row:
self.vector = 0, +1
################################################################################
def main():
global playing, you
screen = util.Screen(boards.boards[0])
you = You(screen, '^')
screen.update()
players = [you]
clock = 0
playing = True
time.sleep(2)
while playing:
clock += 1
if clock == 40:
players.append(Robot(screen, '&'))
time.sleep(.1)
key = ttyWindows.readLookAhead()
for player in players:
player.setDirection(key)
player.move()
screen.update()
screen.update()
time.sleep(2)
if __name__ == '__main__':
main()
##########
# load4.py
##########
import boards
import util
import time
import ttyWindows
################################################################################
class Player:
def __init__(self, screen, face, row=1, column=10):
self.screen = screen
self.face = face
self.row = row
self.column = column
self.vector = 0, 0
def move(self):
global playing, you
context = self.screen.read(self.row, self.column)
left = self.screen.read(self.row, self.column - 1)
right = self.screen.read(self.row, self.column + 1)
x, y = self.vector
x_move = False
if context == '_':
self.column += x
x_move = True
elif context == '|':
self.row += y
elif context == ' ':
if self.screen.read(self.row + 1, self.column) != '|' or y == 1:
self.row += 1
else:
self.column += x
if not x_move and context != ' ':
if left == '_' and x == -1:
self.column -= 1
elif right == '_' and x == 1:
self.column += 1
self.screen.write(self.row, self.column, self.face)
if self is you and self.screen.read(self.row, self.column) is None:
playing = False
################################################################################
class You(Player):
def __init__(self, screen, face, row=1, column=10):
Player.__init__(self, screen, face, row, column)
self.score = 0
def setDirection(self, key):
context = self.screen.read(self.row, self.column)
if context == '*':
self.score += 10
self.screen.cache_write(self.row, self.column, '_')
if key == '\xE0H':
self.vector = 0, -1
elif key == '\xE0P':
self.vector = 0, +1
elif key == '\xE0K':
self.vector = -1, 0
elif key == '\xE0M':
self.vector = +1, 0
elif key == 'a':
self.screen.cache_write(self.row, self.column - 1, ' ')
elif key == 'd':
self.screen.cache_write(self.row, self.column + 1, ' ')
class Robot(Player):
def setDirection(self, key):
global playing, you
if you.row == self.row and you.column == self.column:
playing = False
if self.row == you.row:
if self.column > you.column:
self.vector = -1, 0
else:
self.vector = +1, 0
else:
context = self.screen.read(self.row, self.column)
if context == '|':
if self.row > you.row:
self.vector = 0, -1
elif self.row < you.row:
self.vector = 0, +1
################################################################################
def main():
global playing, you
screen = util.Screen2(boards.boards[0])
you = You(screen, '^')
screen.update()
players = [you]
clock = 0
playing = True
time.sleep(2)
while playing:
clock += 1
if clock == 90:
players.append(Robot(screen, '&'))
time.sleep(.1)
key = ttyWindows.readLookAhead()
for player in players:
player.setDirection(key)
player.move()
screen.update()
print 'Score: %s' % you.score
screen.update()
print 'Score: %s' % you.score
time.sleep(2)
if __name__ == '__main__':
main()
##########
# load5.py
##########
import boards
import random
import time
import ttyWindows
import util
################################################################################
class Player:
def __init__(self, screen, face, row=1, column=10):
self.screen = screen
self.face = face
self.row = row
self.column = column
self.vector = 0, 0
def move(self):
global playing, you, players
context = self.screen.read(self.row, self.column)
left = self.screen.read(self.row, self.column - 1)
right = self.screen.read(self.row, self.column + 1)
x, y = self.vector
x_move = False
if context == '_':
self.column += x
x_move = True
elif context == '|':
self.row += y
elif context == ' ':
if self.screen.read(self.row + 1, self.column) != '|' or y == 1:
self.row += 1
else:
self.column += x
if not x_move and context != ' ':
if left == '_' and x == -1:
self.column -= 1
elif right == '_' and x == 1:
self.column += 1
self.screen.write(self.row, self.column, self.face)
if self.screen.read(self.row, self.column) is None:
if self is you:
playing = False
else:
players.remove(self)
################################################################################
class You(Player):
def __init__(self, screen, face, row=1, column=10):
Player.__init__(self, screen, face, row, column)
self.score = 0
def setDirection(self, key):
context = self.screen.read(self.row, self.column)
if context == '*':
self.score += 10
self.screen.cache_write(self.row, self.column, '_')
if key == '\xE0H':
self.vector = 0, -1
elif key == '\xE0P':
self.vector = 0, +1
elif key == '\xE0K':
self.vector = -1, 0
elif key == '\xE0M':
self.vector = +1, 0
elif key == 'a':
self.screen.cache_write(self.row, self.column - 1, ' ')
elif key == 'd':
self.screen.cache_write(self.row, self.column + 1, ' ')
class Robot(Player):
def __init__(self, screen, face, row=1, column=10):
Player.__init__(self, screen, face, row, column)
self.move_count = 0
def move(self):
if self.screen.read(self.row, self.column) == ' ':
Player.move(self)
else:
self.move_count += 1
if self.move_count % 2:
Player.move(self)
else:
self.screen.write(self.row, self.column, self.face)
def setDirection(self, key):
global playing, you
if you.row == self.row and you.column == self.column:
playing = False
if self.column > you.column:
self.vector = -1, 0
elif self.column < you.column:
self.vector = +1, 0
if self.row != you.row:
context = self.screen.read(self.row, self.column)
if context == '|':
if self.row > you.row:
self.vector = 0, -1
elif self.row < you.row:
self.vector = 0, +1
################################################################################
SELECT = 1
def main():
global playing, you, players
screen = util.Screen2(boards.boards[SELECT])
you = You(screen, '^')
screen.update()
players = [you]
clock = 0
playing = True
time.sleep(2)
while playing:
clock += 1
if clock > 40 and len(players) < 3:
players.append(Robot(screen, '&', column=random.randrange(len(boards.boards[SELECT].board().splitlines()[1]))))
time.sleep(.1)
key = ttyWindows.readLookAhead()
for player in players:
player.setDirection(key)
player.move()
screen.update()
print 'Score: %s' % you.score
screen.update()
print 'Score: %s' % you.score
time.sleep(2)
if __name__ == '__main__':
main()
##########################
# Extended Demo (Sound).py
##########################
import boards
import random
import time
import ttyWindows
import util
import winsound
################################################################################
class Player:
def __init__(self, screen, face, row=1, column=10):
self.screen = screen
self.face = face
self.row = row
self.column = column
self.vector = 0, 0
def move(self):
global playing, you, players
context = self.screen.read(self.row, self.column)
left = self.screen.read(self.row, self.column - 1)
right = self.screen.read(self.row, self.column + 1)
x, y = self.vector
x_move = False
if context == '_':
self.column += x
x_move = True
elif context == '|':
self.row += y
elif context == ' ':
if self.screen.read(self.row + 1, self.column) != '|' or y == 1:
self.row += 1
else:
self.column += x
if not x_move and context != ' ':
if left == '_' and x == -1:
self.column -= 1
elif right == '_' and x == 1:
self.column += 1
self.screen.write(self.row, self.column, self.face)
if self.screen.read(self.row, self.column) is None:
if self is you:
playing = False
else:
players.remove(self)
winsound.Beep(400, 25)
winsound.Beep(500, 25)
################################################################################
class You(Player):
def __init__(self, screen, face, row=1, column=10):
Player.__init__(self, screen, face, row, column)
self.score = 0
def setDirection(self, key):
context = self.screen.read(self.row, self.column)
if context == '*':
self.score += 10
self.screen.cache_write(self.row, self.column, '_')
winsound.Beep(300, 50)
if key == '\xE0H':
self.vector = 0, -1
elif key == '\xE0P':
self.vector = 0, +1
elif key == '\xE0K':
self.vector = -1, 0
elif key == '\xE0M':
self.vector = +1, 0
elif key == 'a':
self.screen.cache_write(self.row, self.column - 1, ' ')
elif key == 'd':
self.screen.cache_write(self.row, self.column + 1, ' ')
class Robot(Player):
def __init__(self, screen, face, row=1, column=10):
Player.__init__(self, screen, face, row, column)
self.move_count = 0
def move(self):
if self.screen.read(self.row, self.column) == ' ':
Player.move(self)
else:
self.move_count += 1
if self.move_count % 2:
Player.move(self)
else:
self.screen.write(self.row, self.column, self.face)
def setDirection(self, key):
global playing, you
if you.row == self.row and you.column == self.column:
playing = False
if self.column > you.column:
self.vector = -1, 0
elif self.column < you.column:
self.vector = +1, 0
if self.row != you.row:
context = self.screen.read(self.row, self.column)
if context == '|':
if self.row > you.row:
self.vector = 0, -1
elif self.row < you.row:
self.vector = 0, +1
################################################################################
SELECT = 1
ROBOTS = 3
def main():
global playing, you, players
screen = util.Screen2(boards.boards[SELECT])
you = You(screen, '^')
screen.update()
players = [you]
clock = 0
playing = True
time.sleep(2)
note = False
while playing:
clock += 1
if clock > 40 and len(players) - 1 < ROBOTS:
players.append(Robot(screen, '&', column=random.randrange(len(boards.boards[SELECT].board().splitlines()[1]))))
time.sleep(0.1)
key = ttyWindows.readLookAhead()
for player in players:
player.setDirection(key)
player.move()
screen.update()
print 'Score: %s' % you.score
winsound.Beep(100 + 100 * note, 25)
note = not note
screen.update()
print 'Score: %s' % you.score
for x in range(4):
time.sleep(0.1)
winsound.Beep(700 - 100 * x, 25)
time.sleep(2)
if __name__ == '__main__':
main()
|
The following files are also required for running the code up above.
boards.py
class Board:
TABLE = ''.join([chr(i) for i in range(256)])
NAME = ''.join([chr(i) for i in range(256) if len(repr(chr(i))) == 3 or i == ord('\\')])
BOARD = '\n *_|'
def __init__(self, name, board):
self.__name = name
self.__board = board
self.__check()
def name(self):
return self.__name
def board(self):
return self.__board
def __check(self):
name_error = self.__name.translate(self.TABLE, self.NAME)
board_error = self.__board.translate(self.TABLE, self.BOARD)
assert self.__name and not name_error
assert self.__board and not board_error
self.__logic()
def __logic(self):
board = self.__board.splitlines()
assert not board[0]
columns = len(board[1])
assert columns
for row in board[2:]:
assert len(row) == columns
################################################################################
first_try = Board('First Try', '''
__*___|_
| |
| |
_|__*________|______*___
| |
___*____|___________|_
| |
| |
| |
____*_________________|___________|______*____ ''')
################################################################################
second_try = Board('Second Try', '''
__*___|_
_|________*_____|_*___|___ |
| | | | |
_|_*_ | __*__|_ _|__*________|______*_|_
| | | |
| ___*____|________|__|_ _*__|_
| | | |
| _|__*_ | __*__|_ |
| | | |
____*__|______|_______|___________|______*____ ''')
################################################################################
boards = first_try, second_try
ttyWindows.py
import msvcrt
def readLookAhead():
string = str()
while msvcrt.kbhit():
string += msvcrt.getch()
return string
util.py
import os
################################################################################
class Screen:
def __init__(self, board):
self.__cache = [tuple(row) for row in board.board().splitlines()[1:]]
self.__board()
def write(self, row, column, character):
try:
self.__temp[row][column] = character[0]
except:
pass
def read(self, row, column):
try:
return self.__temp[row][column]
except:
pass
def update(self):
self.__clear()
self.__print()
self.__board()
def __clear(self):
if os.name == 'nt':
os.system('cls')
elif os.name == 'posix' or os.name == 'mac':
os.system('clear')
else:
raise OSError, 'not supported'
def __print(self):
print '\n'.join([''.join(row) for row in self.__temp])
def __board(self):
self.__temp = [list(row) for row in self.__cache]
################################################################################
class Screen2:
def __init__(self, board):
self.__cache = [list(row) for row in board.board().splitlines()[1:]]
self.__board()
def cache_write(self, row, column, character):
try:
self.__cache[row][column] = character[0]
self.write(row, column, character)
except:
pass
def write(self, row, column, character):
try:
self.__temp[row][column] = character[0]
except:
pass
def read(self, row, column):
try:
return self.__temp[row][column]
except:
pass
def update(self):
self.__clear()
self.__print()
self.__board()
def __clear(self):
if os.name == 'nt':
os.system('cls')
elif os.name == 'posix' or os.name == 'mac':
os.system('clear')
else:
raise OSError, 'not supported'
def __print(self):
print '\n'.join([''.join(row) for row in self.__temp])
def __board(self):
self.__temp = [list(row) for row in self.__cache]
