code: def _init_converters(types_map):
      
      global _converters
      _converters = {}
      for i in _DEFAULT_CONVERTERS:
          const_val = types_map[i]
          _converters[const_val] = _DEFAULT_CONVERTERS[i]
docs: Prepares the converters for conversion of java types to python
      objects.
      types_map: Mapping of java.sql.Types field name to java.sql.Types
      field constant value