code: def from_pystr_to_cstr(data):
      
  
      if not isinstance(data, list):
          raise NotImplementedError
      pointers = (ctypes.c_char_p * len(data))()
      if PY3:
          data = [bytes(d, 'utf-8') for d in data]
      else:
          data = [d.encode('utf-8') if isinstance(d, unicode) else d  # pylint: disable=undefined-variable
                  for d in data]
      pointers[:] = data
      return pointers
docs: Convert a list of Python str to C pointer
  
      Parameters
      ----------
      data : list
          list of str