[BUG] NameError: name 'get_variable_name' is not defined

[junpenglao]

get_variable_name missing in pm.distributions:

with pm.Model():
    test=pm.DiscreteUniform('test', 0,10)
test

raise:

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj)
    307             method = get_real_method(obj, self.print_method)
    308             if method is not None:
--> 309                 return method()
    310             return None
    311         else:

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pymc3/model.py in _repr_latex_(self, name, dist)
    830         if dist is None:
    831             dist = self.distribution
--> 832         return self.distribution._repr_latex_(name=name, dist=dist)
    833 
    834     @property

/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pymc3/distributions/discrete.py in _repr_latex_(self, name, dist)
    468         upper = dist.upper
    469         return r'${} \sim \text{{DiscreteUniform}}(\mathit{{lower}}={}, \mathit{{upper}}={})$'.format(name,
--> 470                                                 get_variable_name(lower),
    471                                                 get_variable_name(upper))
    472 

NameError: name 'get_variable_name' is not defined