raw_input and break

[input/ldompeling at casema.nl]

Hi,

I tried to define SEQUENCE with:
The script is working now, exept that I do'nt get a menu in terminal for "s" to stop.
---------------------------------------------------------------------------------

def SEQUENCE():


    while notDone:
        if mindist > us_dist(15):
            for (dir, tm) in SEQUENCE:
                    move(dir, tm)

---------------------------------------------------------------------------------
In reply to "input/ldompeling at casema.nl" who wrote the following:

> He,
> Thank you for making some time for it.
> Is this your code ?
> I am also using python 3
> 
> I got an error with execute the scipt:
> -----------------------------------------------------------------------
> 
> Enter command> Traceback (most recent call last):
>   File "test06.py", line 44, in <module>
>     for (dir, tm) in SEQUENCE:
> NameError: name 'SEQUENCE' is not defined
> -----------------------------------------------------------------------
> 
> import time
> import threading
> 
> set_right_speed(150)
> set_left_speed(105)
> 
> def cmdHandler():
>         global notDone
>         while True:
>                 cmd = raw_input("Enter command> ").lower()
>                 if cmd.startswith("s"):
>                         notDone = False
>                         break
>                 else:
>                         print ("Unimplemented command: %s") % cmd
> 
> cmdThread = threading.Thread(target=cmdHandler)
> cmdThread.start()
> def move(drct, dly):
>         if drct == FORWARD:
>                 fwd()
>                 print ("Forward")
>         elif drct == BACKWARD:
>                 bwd()
>                 print ("Backward")
>         elif drct == LEFT:
>                 left()
>                 print ("Left")
>         elif drct == RIGHT:
>                 right()
>                 print ("Right")
>         else:
>                 print ("Invalid command: %s") % drct
>         time.sleep(dly)
>         stop()
> 
> notDone = True
> 
> servo(90)
> mindist = 80
> 
> while notDone:
>         if mindist > us_dist(15):
>                 for (dir, tm) in SEQUENCE:
>                         move(dir, tm)
> 
> ------------------------------------------------------------------------------
> ---------------
> In reply to "Dennis Lee Bieber" who wrote the following:
> 
> > On Thu, 05 Nov 2015 17:28:36 GMT, input/ldompeling at casema.nl declaimed the
> > following:
> > 
> > > Oke, lets try your code.Can you help me with that.
> > > This is my code:
> > > -------------------------------------------------
> > > from gopigo import *
> > > import time
> > > 
> > > set_right_speed(150)
> > > set_left_speed(105)
> > 
> >  Is there a typo there? If those are setting rotation speeds for
> > independent drive wheels, you will have a slow left turn enabled.
> > 
> > > enable_servo()
> > > fwd()
> > > print("forward 1x")
> > > time.sleep(4)
> > > stop()
> > > 
> > > while True:
> > >    servo(90)
> > >    mindist = 80
> > > 
> > >    if mindist > us_dist(15):
> > 
> >  "mindist" will always be 80 -- there is no code shown below that ever
> > changes it (so the above assignment can be put before the "while"
> > statement). That means your us_dist() function must somewhere return a
> > value greater than 80.
> > 
> > >        bwd()
> > >        print ("backward 1x")
> > >        time.sleep(2)
> > >        stop()
> > >        right()
> > >        time.sleep(1)
> > >        stop()
> > >        print("right 1x")
> > >        time.sleep(2)
> > 
> >  You stopped the right() call before ever doing any output
> > 
> > >        stop()
> > >        fwd()
> > >        print("forward 2x")
> > >        time.sleep(3)
> > >        stop()
> > >        left()
> > >        time.sleep(1)
> > >        print("left 1x")
> > >        stop()
> > >        fwd()
> > >        print("forward 3x")
> > >        time.sleep(2)
> > >        stop()
> > > ------------------------------------------------------
> > 
> >  Off-hand, I'd try to get rid of a lot of that redundancy by defining
> > functions to encapsulate your sequence... (Python 2.x syntax -- not tested)
> > 
> > 
> > (FORWARD, BACKWARD, LEFT, RIGHT) = (1, 2, 3, 4)
> > SEQUENCE = [ (BACKWARD, 2),
> >     (RIGHT, 1),
> >     (FORWARD, 3),
> >     (LEFT, 1),
> >     (FORWARD, 2) ]
> > 
> > def move(drct, dly):
> >  if drct == FORWARD:
> >   fwd()
> >   print "Forward"
> >  elif drct == BACKWARD:
> >   bwd()
> >   print "Backward"
> >  elif drct == LEFT:
> >   left()
> >   print "Left"
> >  elif drct == RIGHT:
> >   right()
> >   print "Right"
> >  else:
> >   print "Invalid command: %s" % drct
> >  time.sleep(dly)
> >  stop()
> > 
> > notDone = True
> > servo(90)
> > mindist = 80
> > 
> > while notDone:
> >  if mindist > us_dist(15):
> >   for (dir, tm) in SEQUENCE:
> >    move(dir, tm)
> > 
> > -=-=-=-=-
> > 
> >  Now, if you don't mind having to also press the <enter> key, you could
> > use the threading module to handle the keyboard shutdown command instead of
> > using system specific modules to do raw keystroke input. You'd add
> > something before the while loop (and this is really pseudo-code, barely any
> > attempt at Python):
> > 
> > import threading
> > 
> > def cmdHandler():
> >  global notDone
> >  while True:
> >   cmd = raw_input("Enter command> ").lower()
> >   if cmd.startswith("s"):
> >    notDone = False
> >    break
> >   else:
> >    print "Unimplemented command: %s" % cmd
> > 
> > cmdThread = threading.Thread(target=cmdHandler)
> > cmdThread.start()
> > 
> >  This concept doesn't require changes if the underlying OS changes, and
> > does open things up to having more complex commands (one could have
> > commands with arguments since the input is line oriented).
> > 
> > --
> >  Wulfraed                 Dennis Lee Bieber         AF6VN
> >     wlfraed at ix.netcom.com    HTTP://wlfraed.home.netcom.com/
> 
> 
> 
> 
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