Parse a table of variable bindings (dictionary with key = variable name)

def _parse_vars_tbl(self, var_tbl):
        """Parse a table of variable bindings (dictionary with key = variable name)"""

        # Find the length of each variable to infer T
        T = self._check_forward_mode_input_dict(var_tbl)
        # The shape of X based on T and m
        shape = (T, 1)

        # Initialize X to zeros in the correct shape        
        X = np.zeros(shape)
        X[:,0] = var_tbl[self.var_name]
        return X