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


    

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


    

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

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


    

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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


    

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# 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)


    

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


    

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display(wminus, wpick, wplus)