Automatic padding based on the length of axis labels about vincent HOT 9 CLOSED

---> 20 bar.padding = 'auto'
     21 #bar.padding['top'] = 10
     22 #bar.padding['right'] = 100

/Users/myusuf3/.virtualenvs/talk/lib/python2.7/site-packages/vincent/core.py in setter(self, value)
    149         def setter(self, value):
    150             if isinstance(grammar_type, (type, tuple)):
--> 151                 _assert_is_type(validator.__name__, value, grammar_type)
    152             validator(value)
    153             self.grammar[name] = value

/Users/myusuf3/.virtualenvs/talk/lib/python2.7/site-packages/vincent/core.py in _assert_is_type(name, value, value_type)
     42         if type(value_type) is tuple:
     43             types = ', '.join(t.__name__ for t in value_type)
---> 44             raise ValueError('{0} must be one of ({1})'.format(name, types))
     45         else:
     46             raise ValueError('{0} must be {1}'

ValueError: padding must be one of (int, dict)