code: def bool(self):
          
          v = self.squeeze()
          if isinstance(v, (bool, np.bool_)):
              return bool(v)
          elif is_scalar(v):
              raise ValueError("bool cannot act on a non-boolean single element "
                               "{0}".format(self.__class__.__name__))
  
          self.__nonzero__()
docs: Return the bool of a single element PandasObject.
  
          This must be a boolean scalar value, either True or False.  Raise a
          ValueError if the PandasObject does not have exactly 1 element, or that
          element is not boolean