code: def context(environ):
      """Get a TensorBoard `RequestContext` from a WSGI environment.
  
      Returns:
        A `RequestContext` value.
      """
      return _context.from_environ(environ)
  
imports: import threading
  from bleach.sanitizer import Cleaner
  import markdown
  from tensorboard import context
  from tensorboard.backend import experiment_id
  from tensorboard.util import tb_logging
label_desc: Use image node_id 4 for calling a global function with example usage: context(environ) and returns: _context