text: # !/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  from .quantity import Dimension, Quantity
  from .quantity import DimensionError, SI_UNIT_SYMBOL
  from .quantity import quantify, make_quantity, dimensionify
  from .utils import check_dimension, set_favunit, dimension_and_favunit, drop_dimension, add_back_unit_param, decorate_with_various_unit, array_to_Q_array
  
  from .calculus import *
  
  from .plot import setup_matplotlib
  
  from .units import m, s, kg, A, cd, K, mol, rad, sr
  from .units import SI_units, SI_units_prefixed, SI_derived_units, other_units, units, all_units
  