74 lines
2.5 KiB
Python
74 lines
2.5 KiB
Python
import cmd, sys
|
|
from turtle import *
|
|
|
|
|
|
class TurtleShell(cmd.Cmd):
|
|
intro = 'Welcome to the turtle shell. Type help or ? to list commands.\n'
|
|
prompt = '(turtle) '
|
|
file = None
|
|
|
|
# ----- basic turtle commands -----
|
|
def do_forward(self, arg):
|
|
'Move the turtle forward by the specified distance: FORWARD 10'
|
|
forward(*parse(arg))
|
|
def do_right(self, arg):
|
|
'Turn turtle right by given number of degrees: RIGHT 20'
|
|
right(*parse(arg))
|
|
def do_left(self, arg):
|
|
'Turn turtle left by given number of degrees: LEFT 90'
|
|
left(*parse(arg))
|
|
def do_goto(self, arg):
|
|
'Move turtle to an absolute position with changing orientation. GOTO 100 200'
|
|
goto(*parse(arg))
|
|
def do_home(self, arg):
|
|
'Return turtle to the home position: HOME'
|
|
home()
|
|
def do_circle(self, arg):
|
|
'Draw circle with given radius an options extent and steps: CIRCLE 50'
|
|
circle(*parse(arg))
|
|
def do_position(self, arg):
|
|
'Print the current turtle position: POSITION'
|
|
print('Current position is %d %d\n' % position())
|
|
def do_heading(self, arg):
|
|
'Print the current turtle heading in degrees: HEADING'
|
|
print('Current heading is %d\n' % (heading(),))
|
|
def do_color(self, arg):
|
|
'Set the color: COLOR BLUE'
|
|
color(arg.lower())
|
|
def do_undo(self, arg):
|
|
'Undo (repeatedly) the last turtle action(s): UNDO'
|
|
def do_reset(self, arg):
|
|
'Clear the screen and return turtle to center: RESET'
|
|
reset()
|
|
def do_bye(self, arg):
|
|
'Stop recording, close the turtle window, and exit: BYE'
|
|
print('Thank you for using Turtle')
|
|
self.close()
|
|
bye()
|
|
return True
|
|
|
|
# ----- record and playback -----
|
|
def do_record(self, arg):
|
|
'Save future commands to filename: RECORD rose.cmd'
|
|
self.file = open(arg, 'w')
|
|
def do_playback(self, arg):
|
|
'Playback commands from a file: PLAYBACK rose.cmd'
|
|
self.close()
|
|
with open(arg) as f:
|
|
self.cmdqueue.extend(f.read().splitlines())
|
|
def precmd(self, line):
|
|
line = line.lower()
|
|
if self.file and 'playback' not in line:
|
|
print(line, file=self.file)
|
|
return line
|
|
def close(self):
|
|
if self.file:
|
|
self.file.close()
|
|
self.file = None
|
|
|
|
def parse(arg):
|
|
'Convert a series of zero or more numbers to an argument tuple'
|
|
return tuple(map(int, arg.split()))
|
|
|
|
if __name__ == '__main__':
|
|
TurtleShell().cmdloop() |