code: def sample_data(shape=(73, 145)):
      """Return ``lons``, ``lats`` and ``data`` of some fake data."""
      import numpy as np
  
      nlats, nlons = shape
      lats = np.linspace(-np.pi / 2, np.pi / 2, nlats)
      lons = np.linspace(0, 2 * np.pi, nlons)
      lons, lats = np.meshgrid(lons, lats)
      wave = 0.75 * (np.sin(2 * lats) ** 8) * np.cos(4 * lons)
      mean = 0.5 * np.cos(2 * lats) * ((np.sin(2 * lats)) ** 2 + 2)
  
      lats = np.rad2deg(lats)
      lons = np.rad2deg(lons)
      data = wave + mean
  
      return lons, lats, data
  
imports: import matplotlib.pyplot
  import cartopy.crs
label_desc: Use image node_id 1 for calling a global function with example usage: sample_data(shape) and returns: lons,  lats,  data