class_docstr: Magics that provide central IPython functionality.
  
  These are various magics that don't fit into specific categories but that
  are all part of the base 'IPython experience'.
docstr: Show a quick reference sheet 
code: def quickref(self, arg):
      """Show a quick reference sheet"""
      from IPython.core.usage import quick_reference
  
      qr = quick_reference + self._magic_docs(brief=True)
      page.page(qr)
  
imports: from logging import error
  import io
  import os
  from pprint import pformat
  import sys
  from warnings import warn
  from traitlets.utils.importstring import import_item
  from IPython.core import magic_arguments, page
  from IPython.core.error import UsageError
  from IPython.core.magic import Magics, magics_class, line_magic, magic_escapes
  from IPython.utils.text import format_screen, dedent, indent
  from IPython.testing.skipdoctest import skip_doctest
  from IPython.utils.ipstruct import Struct
label_desc: Use image node_id 9 for calling the BasicMagics obj's underlying member method code with example usage: obj.quickref(arg) without return types