code: def setdmprop(self, name, properties, bycolumn=True):
          
          return self._setdmprop(name, properties, bycolumn)
docs: Set properties of a data manager.
  
          Properties (e.g. cachesize) of a data manager can be changed by
          defining them appropriately in the properties argument (a dict).
          Current values can be obtained using function :func:`getdmprop` which
          also serves as a template. The dict can contain more fields; only
          the fields with the names as returned by getdmprop are handled.
  
          The data manager can be specified in two ways: by data manager name
          or by the name of a column using the data manager. The argument
          `bycolumn` defines which way is used (default is by column name).