def pens_updown_to_papr(lst):
'''Converts all PU((x1, y1, x2, y2) and PD(x1, y1, x2, y2) found in `lst`
into (PU( ), PA(x1, y1, x2, y2)) pair sequences.
The function removes the coordinates from PU and PD and places them in
PR or PA, whatever was last found in lst prior to a PU or PD.'''
if not isinstance(lst, (list, tuple)):
raise TypeError('`lst` argument must be a list or tuple.')
result = [ ]
last_penplot = None
for e in lst:
if isinstance(e, (PU, PD)):
if len(e.xy) > 0:
if last_penplot is None:
msg = "*** WARNING: %s with coordinates found without prior PA or PR. PA assumed." % e
print(msg)
last_penplot = PA( )
last_penplot.xy = e.xy
ec = copy.copy(e)
ec.xy = None
result.append(ec)
result.append(copy.copy(last_penplot))
else:
result.append(e)
else:
if isinstance(e, PR):
last_penplot = PR( )
elif isinstance(e, PA):
last_penplot = PA( )
result.append(e)
return result
def pens_updown_to_papr(lst):
"""Converts all PU((x1, y1, x2, y2) and PD(x1, y1, x2, y2) found in `lst`
into (PU( ), PA(x1, y1, x2, y2)) pair sequences.
The function removes the coordinates from PU and PD and places them in
PR or PA, whatever was last found in lst prior to a PU or PD."""
if not isinstance(lst, (list, tuple)):
raise TypeError("`lst` argument must be a list or tuple.")
result = []
last_penplot = None
for e in lst:
if isinstance(e, (PU, PD)):
if len(e.xy) > 0:
if last_penplot is None:
msg = (
"*** WARNING: %s with coordinates found without prior PA or PR. PA assumed."
% e)
print(msg)
last_penplot = PA()
last_penplot.xy = e.xy
ec = copy.copy(e)
ec.xy = None
result.append(ec)
result.append(copy.copy(last_penplot))
else:
result.append(e)
else:
if isinstance(e, PR):
last_penplot = PR()
elif isinstance(e, PA):
last_penplot = PA()
result.append(e)
return result
def pens_updown_to_papr(lst):
'''Converts all PU((x1, y1, x2, y2) and PD(x1, y1, x2, y2) found in `lst`
into (PU( ), PA(x1, y1, x2, y2)) pair sequences.
The function removes the coordinates from PU and PD and places them in
PR or PA, whatever was last found in lst prior to a PU or PD.'''
if not isinstance(lst, (list, tuple)):
raise TypeError('`lst` argument must be a list or tuple.')
result = []
last_move = None
pen_down = False
pen_up = True
for e in lst:
if isinstance(e, (PU, PD)):
if len(e.xy) > 0:
if last_move is None:
msg = "*** WARNING: %s with coordinates found without prior PA or PR. PA assumed." % e
print(msg)
last_move = PA()
new_move = None
if isinstance(last_move, PA):
new_move = PA()
elif isinstance(last_move, PR):
new_move = PR()
new_move.xy = e.xy
up_down_command = None
if isinstance(e, PU):
if pen_down:
up_down_command = PU()
result.append(up_down_command)
pen_up = True
pen_down = False
elif isinstance(e, PD):
if pen_up:
up_down_command = PD()
result.append(up_down_command)
pen_down = True
pen_up = False
result.append(new_move)
last_move = new_move
else:
if isinstance(e, PU):
if pen_down:
result.append(e)
pen_up = True
elif isinstance(e, PD):
if pen_up:
result.append(e)
pen_down = True
else:
if isinstance(e, PR):
last_move = PR()
elif isinstance(e, PA):
last_move = PA()
result.append(e)
return result
def pens_updown_to_papr(lst):
'''Converts all PU((x1, y1, x2, y2) and PD(x1, y1, x2, y2) found in `lst`
into (PU( ), PA(x1, y1, x2, y2)) pair sequences.
The function removes the coordinates from PU and PD and places them in
PR or PA, whatever was last found in lst prior to a PU or PD.'''
if not isinstance(lst, (list, tuple)):
raise TypeError('`lst` argument must be a list or tuple.')
result = [ ]
last_move = None
pen_down = False
pen_up = True
for e in lst:
if isinstance(e, (PU, PD)):
if len(e.xy) > 0:
if last_move is None:
msg = "*** WARNING: %s with coordinates found without prior PA or PR. PA assumed." % e
print(msg)
last_move = PA( )
new_move = None
if isinstance(last_move, PA):
new_move = PA()
elif isinstance(last_move, PR):
new_move = PR()
new_move.xy = e.xy
up_down_command = None
if isinstance(e, PU):
if pen_down:
up_down_command = PU( )
result.append(up_down_command)
pen_up = True
pen_down = False
elif isinstance(e, PD):
if pen_up:
up_down_command = PD( )
result.append(up_down_command)
pen_down = True
pen_up = False
result.append(new_move)
last_move = new_move
else:
if isinstance(e, PU):
if pen_down:
result.append(e)
pen_up = True
elif isinstance(e, PD):
if pen_up:
result.append(e)
pen_down = True
else:
if isinstance(e, PR):
last_move = PR( )
elif isinstance(e, PA):
last_move = PA( )
result.append(e)
return result