code: def add_matplotlib_cmaps(fail_on_import_error=True):
      
      try:
          from matplotlib import cm as _cm
          from matplotlib.cbook import mplDeprecation
      except ImportError:
          if fail_on_import_error:
              raise
          # silently fail
          return
  
      for name in _cm.cmap_d:
          if not isinstance(name, str):
              continue
          try:
              # Do not load deprecated colormaps
              with warnings.catch_warnings():
                  warnings.simplefilter('error', mplDeprecation)
                  cm = _cm.get_cmap(name)
                  add_matplotlib_cmap(cm, name=name)
          except Exception as e:
              if fail_on_import_error:
                  print("Error adding colormap '%s': %s" % (name, str(e)))
docs: Add all matplotlib colormaps.