code: def get_projection_class(projection=None):
      """
      Get a projection class from its name.
  
      If *projection* is None, a standard rectilinear projection is
      returned.
      """
      if projection is None:
          projection = "rectilinear"
  
      try:
          return projection_registry.get_projection_class(projection)
      except KeyError:
          raise ValueError("Unknown projection '%s'" % projection)
  
file_path: catboost/contrib/python/matplotlib/py2/matplotlib/projections/__init__.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  from .geo import AitoffAxes, HammerAxes, LambertAxes, MollweideAxes
  from .polar import PolarAxes
  from matplotlib import axes
label_desc: Use image node_id 2 for calling a global function with example usage: get_projection_class(projection) and returns: projection_registry