code: def getcolshapestring(self, columnname,
                            startrow=0, nrow=-1, rowincr=1):
          
          return self._getcolshapestring(columnname,
                                         startrow, nrow, rowincr,
                                         True)
docs: Get the shapes of all cells in the column in string format.
  
          It returns the shape in a string like [10,20,30].
  
          If the column contains fixed shape arrays, a single shape is returned.
          Otherwise a list of shape strings is returned.
  
          The column can be sliced by giving a start row (default 0), number of
          rows (default all), and row stride (default 1).