diff --git a/run_in_env.py b/run_in_env.py
new file mode 100644
index 0000000000000000000000000000000000000000..5682d7bd2d6ccfb81206f83551e0c5217dd5d15d
--- /dev/null
+++ b/run_in_env.py
@@ -0,0 +1,21 @@
+#! /usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import sys, os
+
+print('sys.path=')
+for d in sys.path:
+    print(d)
+
+print(f"PYTHONPATH={os.environ['PYTHONPATH']}")
+
+# newpath = sys.path
+# newpath = [d for d in newpath if not 'gmsh' in d ]
+# sys.path = newpath
+
+print('sys.path=')
+for d in sys.path:
+    print(d)
+
+import gmsh
+print('version =',gmsh.GMSH_API_VERSION)
\ No newline at end of file