code: def convert(cls, value, from_base, to_base):
          
          return cls.convert_from_int(
             cls.convert_to_int(value, from_base),
             to_base
          )
docs: Convert value from a base to a base.
  
          :param value: the value to convert
          :type value: sequence of int
          :param int from_base: base of value
          :param int to_base: base of result
          :returns: the conversion result
          :rtype: list of int
          :raises ConvertError: if from_base is less than 2
          :raises ConvertError: if to_base is less than 2
          :raises ConvertError: if elements in value outside bounds
  
          Preconditions:
            * all integers in value must be no less than 0
            * from_base, to_base must be at least 2
  
          Complexity: O(len(value))