try:
 import idlelib.pyshell
except ImportError:
 # IDLE is not installed, but maybe pyshell is on sys.path:
 from . import pyshell
 import os
 idledir = os.path.dirname(os.path.abspath(pyshell.__file__))
 if idledir != os.getcwd():
 # We're not in the IDLE directory, help the subprocess find run.py
 pypath = os.environ.get('PYTHONPATH', '')
 if pypath:
 os.environ['PYTHONPATH'] = pypath + ':' + idledir
 else:
 os.environ['PYTHONPATH'] = idledir
 pyshell.main()
else:
 idlelib.pyshell.main()