+= to Assign Task to Resource Not Working

[disaalda]

When I run this block on bike-shop.ipynb:

green_paint += Alice|Bob
green_post += Alice|Bob

red_paint += Alice|Bob
red_post += Alice|Bob

I get this error:

Exception Traceback (most recent call last)
in
----> 1 green_paint += Alice|Bob
2 green_post += Alice|Bob
3
4 red_paint += Alice|Bob
5 red_post += Alice|Bob

~/anaconda2/lib/python3.6/site-packages/pyschedule/pyschedule.py in add(self, other)
522
523 def add(self,other) :
--> 524 return _TaskAffine(self) + other
525
526 def sub(self,other) :

~/anaconda2/lib/python3.6/site-packages/pyschedule/pyschedule.py in add(self, other)
111 elif isinstance(other,self.element_class) or _isnumeric(other):
112 return self + type(self)(other)
--> 113 raise Exception('ERROR: you cannot add %s to %s' % (str(other),str(self)))
114
115 def sub(self,other) :
Exception: ERROR: you cannot add Alice|Bob to green_paint

Other examples seem to use += to add resource to task, too. Any idea how to fix this?

[snow-abstraction]

I just ran the bike show notebook using Python 3.7 and pyschedule 0.2.34 without any problems. I don't think me having Python 3.7 made any difference.

Which version of pyschedule are you using?

Just to eliminate any issues with corrupt state in the jupyter-notebook, could you create a new notebook a run the following in one cell

from pyschedule import Scenario, solvers, plotters
S = Scenario('bike_paint_shop', horizon=10)
Alice = S.Resource('Alice')
Bob = S.Resource('Bob')
green_paint, red_paint = S.Task('green_paint', length=2), S.Task('red_paint', length=2)
green_post, red_post = S.Task('green_post'), S.Task('red_post')
S += green_paint < green_post, red_paint + 1 <= red_post
green_paint += Alice|Bob
green_post += Alice|Bob
red_paint += Alice|Bob
red_post += Alice|Bob

and post the output?