code: def ID_colored_tube(color):
      
      tubing_data_path = os.path.join(os.path.dirname(__file__), "data",
          "3_stop_tubing.txt")
      df = pd.read_csv(tubing_data_path, delimiter='\t')
      idx = df["Color"] == color
      return df[idx]['Diameter (mm)'].values[0] * u.mm
docs: Look up the inner diameter of Ismatec 3-stop tubing given its color code.
  
      :param color: Color of the 3-stop tubing
      :type color: string
  
      :returns: Inner diameter of the 3-stop tubing (mm)
      :rtype: float
  
      :Examples:
  
      >>> from aguaclara.research.peristaltic_pump import ID_colored_tube
      >>> from aguaclara.core.units import unit_registry as u
      >>> ID_colored_tube("yellow-blue")
      <Quantity(1.52, 'millimeter')>
      >>> ID_colored_tube("orange-yellow")
      <Quantity(0.51, 'millimeter')>
      >>> ID_colored_tube("purple-white")
      <Quantity(2.79, 'millimeter')>