code: def __init__(self, dpi):
      self.dpi = dpi
      self.gc = GraphicsContextCairo(renderer=self)
      self.width = None
      self.height = None
      self.text_ctx = cairo.Context(
          cairo.ImageSurface(cairo.FORMAT_ARGB32, 1, 1)
      )
      super().__init__()
  
imports: import functools
  import gzip
  import math
  import numpy
  from ..None import _api, cbook, font_manager
  from matplotlib.backend_bases import _Backend, FigureCanvasBase, FigureManagerBase, GraphicsContextBase, RendererBase
  from matplotlib.font_manager import ttfFontProperty
  from matplotlib.path import Path
  from matplotlib.transforms import Affine2D
label_desc: Use image node_id 1 to create a new RendererCairo object from inherited base classes: RendererBase with example: obj = RendererCairo(dpi)