code: def post_submission(self):
          
          # Check that the subreddit can be submitted to
          name = self.content.name
          if '+' in name or name in ('/r/all', '/r/front', '/r/me', '/u/saved'):
              self.term.show_notification("Can't post to {0}".format(name))
              return
  
          submission_info = docs.SUBMISSION_FILE.format(name=name)
          with self.term.open_editor(submission_info) as text:
              if not text:
                  self.term.show_notification('Canceled')
                  return
              elif '\n' not in text:
                  self.term.show_notification('Missing body')
                  return
  
              title, content = text.split('\n', 1)
              with self.term.loader('Posting', delay=0):
                  submission = self.reddit.submit(name, title, text=content,
                                                  raise_captcha_exception=True)
                  # Give reddit time to process the submission
                  time.sleep(2.0)
              if self.term.loader.exception:
                  raise TemporaryFileError()
  
          if not self.term.loader.exception:
              # Open the newly created submission
              self.selected_page = self.open_submission_page(submission=submission)
docs: Post a new submission to the given subreddit.