Add portable python environment

PythonHome/Lib/idlelib/idle.pyw

@@ -0,0 +1,21 @@
+try:
+    import idlelib.PyShell
+except ImportError:
+    # IDLE is not installed, but maybe PyShell is on sys.path:
+    try:
+        import PyShell
+    except ImportError:
+        raise
+    else:
+        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()