class_docstr: A Mixin for applications that start InteractiveShell instances.
  
  Provides configurables for loading extensions and executing files
  as part of configuring a Shell environment.
  
  The following methods should be called by the :meth:`initialize` method
  of the subclass:
  
    - :meth:`init_path`
    - :meth:`init_shell` (to be implemented by the subclass)
    - :meth:`init_gui_pylab`
    - :meth:`init_extensions`
    - :meth:`init_code`
class_docstr_tok: ["A","Mixin","for","applications","that","start","InteractiveShell","instances",".","Provides","configurables","for","loading","extensions","and","executing","files","as","part","of","configuring","a","Shell","environment",".","The","following","methods","should","be","called","by","the",":","meth",":","`","initialize","`","method","of","the","subclass",":","-",":","meth",":","`","init_path","`","-",":","meth",":","`","init_shell","`","(","to","be","implemented","by","the","subclass",")","-",":","meth",":","`","init_gui_pylab","`","-",":","meth",":","`","init_extensions","`","-",":","meth",":","`","init_code","`"]
docstr: Run files from IPythonApp.exec_files
docstr_tok: ["Run","files","from","IPythonApp.exec_files"]
code: def _run_exec_files(self):
      """Run files from IPythonApp.exec_files"""
      if not self.exec_files:
          return
  
      self.log.debug("Running files in IPythonApp.exec_files...")
      try:
          for fname in self.exec_files:
              self._exec_file(fname)
      except:
          self.log.warning(
              "Unknown error in handling IPythonApp.exec_files:"
          )
          self.shell.showtraceback()
  
imports: import glob
  from itertools import chain
  import os
  import sys
  from traitlets.config.application import boolean_flag
  from traitlets.config.configurable import Configurable
  from traitlets.config.loader import Config
  from IPython.core.application import SYSTEM_CONFIG_DIRS, ENV_CONFIG_DIRS
  from IPython.core import pylabtools
  from IPython.utils.contexts import preserve_keys
  from IPython.utils.path import filefind
  from traitlets import Unicode, Instance, List, Bool, CaselessStrEnum, observe, DottedObjectName
  from IPython.terminal import pt_inputhooks
label_desc: Use image node_id 10 for calling the InteractiveShellApp obj's underlying member method code with example usage: obj._run_exec_files() without return types