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