[Python-checkins] r46624 - python/trunk/Demo/curses/life.py
andrew.kuchling
python-checkins at python.org
Sun Jun 4 01:00:00 CEST 2006
Author: andrew.kuchling
Date: Sun Jun 4 00:59:59 2006
New Revision: 46624
Modified:
python/trunk/Demo/curses/life.py
Log:
Some code tidying; use curses.wrapper
Modified: python/trunk/Demo/curses/life.py
==============================================================================
--- python/trunk/Demo/curses/life.py (original)
+++ python/trunk/Demo/curses/life.py Sun Jun 4 00:59:59 2006
@@ -44,14 +44,15 @@
scr -- curses screen object to use for display
char -- character used to render live cells (default: '*')
"""
- self.state={} ; self.scr=scr
+ self.state = {}
+ self.scr = scr
Y, X = self.scr.getmaxyx()
self.X, self.Y = X-2, Y-2-1
self.char = char
self.scr.clear()
# Draw a border around the board
- border_line='+'+(self.X*'-')+'+'
+ border_line = '+'+(self.X*'-')+'+'
self.scr.addstr(0, 0, border_line)
self.scr.addstr(self.Y+1,0, border_line)
for y in range(0, self.Y):
@@ -73,16 +74,16 @@
del self.state[x,y]
self.scr.addch(y+1, x+1, ' ')
else:
- self.state[x,y]=1
+ self.state[x,y] = 1
self.scr.addch(y+1, x+1, self.char)
self.scr.refresh()
def erase(self):
"""Clear the entire board and update the board display"""
- self.state={}
- self.display(update_board=0)
+ self.state = {}
+ self.display(update_board=False)
- def display(self, update_board=1):
+ def display(self, update_board=True):
"""Display the whole board, optionally computing one generation"""
M,N = self.X, self.Y
if not update_board:
@@ -95,42 +96,46 @@
self.scr.refresh()
return
- d={} ; self.boring=1
+ d = {}
+ self.boring = 1
for i in range(0, M):
- L=range( max(0, i-1), min(M, i+2) )
+ L = range( max(0, i-1), min(M, i+2) )
for j in range(0, N):
- s=0
- live=self.state.has_key( (i,j) )
+ s = 0
+ live = self.state.has_key( (i,j) )
for k in range( max(0, j-1), min(N, j+2) ):
for l in L:
if self.state.has_key( (l,k) ):
- s=s+1
- s=s-live
- if s==3:
+ s += 1
+ s -= live
+ if s == 3:
# Birth
- d[i,j]=1
+ d[i,j] = 1
self.scr.addch(j+1, i+1, self.char)
- if not live: self.boring=0
- elif s==2 and live: d[i,j]=1 # Survival
+ if not live: self.boring = 0
+ elif s == 2 and live: d[i,j] = 1 # Survival
elif live:
# Death
self.scr.addch(j+1, i+1, ' ')
- self.boring=0
- self.state=d
+ self.boring = 0
+ self.state = d
self.scr.refresh()
def makeRandom(self):
"Fill the board with a random pattern"
- self.state={}
+ self.state = {}
for i in range(0, self.X):
for j in range(0, self.Y):
- if random.random() > 0.5: self.set(j,i)
+ if random.random() > 0.5:
+ self.set(j,i)
def erase_menu(stdscr, menu_y):
"Clear the space where the menu resides"
- stdscr.move(menu_y, 0) ; stdscr.clrtoeol()
- stdscr.move(menu_y+1, 0) ; stdscr.clrtoeol()
+ stdscr.move(menu_y, 0)
+ stdscr.clrtoeol()
+ stdscr.move(menu_y+1, 0)
+ stdscr.clrtoeol()
def display_menu(stdscr, menu_y):
"Display the menu of possible keystroke commands"
@@ -140,18 +145,17 @@
stdscr.addstr(menu_y+1, 4,
'E)rase the board, R)andom fill, S)tep once or C)ontinuously, Q)uit')
-def main(stdscr):
-
+def keyloop(stdscr):
# Clear the screen and display the menu of keys
stdscr.clear()
stdscr_y, stdscr_x = stdscr.getmaxyx()
- menu_y=(stdscr_y-3)-1
+ menu_y = (stdscr_y-3)-1
display_menu(stdscr, menu_y)
# Allocate a subwindow for the Life board and create the board object
- subwin=stdscr.subwin(stdscr_y-3, stdscr_x, 0, 0)
- board=LifeBoard(subwin, char=ord('*'))
- board.display(update_board=0)
+ subwin = stdscr.subwin(stdscr_y-3, stdscr_x, 0, 0)
+ board = LifeBoard(subwin, char=ord('*'))
+ board.display(update_board=False)
# xpos, ypos are the cursor's position
xpos, ypos = board.X/2, board.Y/2
@@ -159,9 +163,9 @@
# Main loop:
while (1):
stdscr.move(1+ypos, 1+xpos) # Move the cursor
- c=stdscr.getch() # Get a keystroke
+ c = stdscr.getch() # Get a keystroke
if 0<c<256:
- c=chr(c)
+ c = chr(c)
if c in ' \n':
board.toggle(ypos, xpos)
elif c in 'Cc':
@@ -173,50 +177,40 @@
# if no keystroke is available, instead of waiting.
stdscr.nodelay(1)
while (1):
- c=stdscr.getch()
- if c!=-1: break
- stdscr.addstr(0,0, '/'); stdscr.refresh()
+ c = stdscr.getch()
+ if c != -1:
+ break
+ stdscr.addstr(0,0, '/')
+ stdscr.refresh()
board.display()
- stdscr.addstr(0,0, '+'); stdscr.refresh()
+ stdscr.addstr(0,0, '+')
+ stdscr.refresh()
stdscr.nodelay(0) # Disable nodelay mode
display_menu(stdscr, menu_y)
- elif c in 'Ee': board.erase()
- elif c in 'Qq': break
+ elif c in 'Ee':
+ board.erase()
+ elif c in 'Qq':
+ break
elif c in 'Rr':
board.makeRandom()
- board.display(update_board=0)
+ board.display(update_board=False)
elif c in 'Ss':
board.display()
else: pass # Ignore incorrect keys
- elif c==curses.KEY_UP and ypos>0: ypos=ypos-1
- elif c==curses.KEY_DOWN and ypos<board.Y-1: ypos=ypos+1
- elif c==curses.KEY_LEFT and xpos>0: xpos=xpos-1
- elif c==curses.KEY_RIGHT and xpos<board.X-1: xpos=xpos+1
- else: pass # Ignore incorrect keys
-
-if __name__=='__main__':
- try:
- # Initialize curses
- stdscr=curses.initscr()
- # Turn off echoing of keys, and enter cbreak mode,
- # where no buffering is performed on keyboard input
- curses.noecho() ; curses.cbreak()
-
- # In keypad mode, escape sequences for special keys
- # (like the cursor keys) will be interpreted and
- # a special value like curses.KEY_LEFT will be returned
- stdscr.keypad(1)
- main(stdscr) # Enter the main loop
- # Set everything back to normal
- stdscr.keypad(0)
- curses.echo() ; curses.nocbreak()
- curses.endwin() # Terminate curses
- except:
- # In the event of an error, restore the terminal
- # to a sane state.
- stdscr.keypad(0)
- curses.echo() ; curses.nocbreak()
- curses.endwin()
- traceback.print_exc() # Print the exception
+ elif c == curses.KEY_UP and ypos>0: ypos -= 1
+ elif c == curses.KEY_DOWN and ypos<board.Y-1: ypos += 1
+ elif c == curses.KEY_LEFT and xpos>0: xpos -= 1
+ elif c == curses.KEY_RIGHT and xpos<board.X-1: xpos += 1
+ else:
+ # Ignore incorrect keys
+ pass
+
+
+def main(stdscr):
+ keyloop(stdscr) # Enter the main loop
+
+
+if __name__ == '__main__':
+ curses.wrapper(main)
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