code: def main():
      fig = plt.figure(figsize=(10, 5))
      ax = fig.add_subplot(1, 1, 1, projection=ccrs.Mollweide())
  
      lons, lats, data = sample_data()
  
      ax.contourf(
          lons,
          lats,
          data,
          transform=ccrs.PlateCarree(),
          cmap="nipy_spectral",
      )
      ax.coastlines()
      ax.set_global()
      plt.show()
  
imports: import matplotlib.pyplot
  import numpy
  import cartopy.crs
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types