In [1]:

    

%reset -f
import ipywidgets as widgets
from IPython.display import display
from traitlets import CInt, link


    

In [2]:

    

class Counter(widgets.DOMWidget):
    value = CInt(0, sync=True)


    

In [3]:

    

def button_plus(counter, w):
    counter.increment(+1)  

def button_minus(counter, w):
    counter.increment(-1)


    

In [4]:

    

counter = Counter()
def button_plus(dummy_arg):
    print name
    counter.value += 1 if counter.value < 10 else 0
def button_minus(dummy_arg):
    counter.value -= 1 if counter.value > 0 else 0


    

In [5]:

    

# 1 step forward button
wplus = widgets.Button(description='>')

# 1 step backward button
wminus = widgets.Button(description='<')

# integer slider
wpick = widgets.IntSlider(value=0,min=0,max=10,step=1,description="time step")
wplus.on_click(button_plus)
wminus.on_click(button_minus)


    

In [6]:

    

link((wpick, 'value'), (counter, 'value'));


    

In [7]:

    

display(wminus, wpick, wplus)


    

    




---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-4-895ea9cb9eeb> in button_plus(dummy_arg)
      1 counter = Counter()
      2 def button_plus(dummy_arg):
----> 3     print name
      4     counter.value += 1 if counter.value < 10 else 0
      5 def button_minus(dummy_arg):

NameError: global name 'name' is not defined

In [ ]: