class_docstr: A set of magics useful when controlling a parallel IPython cluster.
code: def pxrun_nodes(self, *args, **kwargs):
      cell = self._px_cell
      if re.search(r"^\s*%autopx\b", cell):
          self._disable_autopx()
          return False
      else:
          try:
              self.parallel_execute(cell)
          except:
              self.shell.showtraceback()
              return True
          else:
              return False
  
imports: import time
  from contextlib import contextmanager
  import inspect
  import re
  import sys
  from textwrap import dedent
  from IPython.core import magic_arguments
  from IPython.core.error import UsageError
  from IPython.core.magic import Magics, no_var_expand
  import ipyparallel
  from ..None import error
label_desc: Use image node_id 12 for calling the ParallelMagics obj's underlying member method code with example usage: obj.pxrun_nodes() and returns: False, False, True