class_docstr: Class defines the rectangle of an element in the Abbyy document
class_docstr_tok: ["Class","defines","the","rectangle","of","an","element","in","the","Abbyy","document"]
docstr: Constructs a Rect class
  :param l: length
  :param t: top
  :param r: right
  :param b: bottom
docstr_tok: ["Constructs","a","Rect","class",":","param","l",":","length",":","param","t",":","top",":","param","r",":","right",":","param","b",":","bottom"]
code: def __init__(self, l: int, t: int, r: int, b: int):
      """
      Constructs a Rect class
      :param l: length
      :param t: top
      :param r: right
      :param b: bottom
      """
  
      self.left = l
      self.top = t
      self.right = r
      self.bottom = b
      self.height = self.bottom - self.top
      self.width = self.right - self.left
  
label_desc: Use image node_id 1 to create a new Rect object  with example: obj = Rect(l, t, r, b)