#943: better error message in case of version conflict on import.

giampaolo · Nov 2, 2016 · 58c4b3d · 58c4b3d
1 parent 71282df
commit 58c4b3d
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diff --git a/HISTORY.rst b/HISTORY.rst
@@ -5,6 +5,10 @@
 
 *XXXX-XX-XX*
 
+**Enhncements**
+
+- 943_: better error message in case of version conflict on import.
+
 **Bug fixes**
 
 - 932_: [NetBSD] net_connections() and Process.connections() may fail without

diff --git a/psutil/__init__.py b/psutil/__init__.py
@@ -203,8 +203,16 @@
 if (int(__version__.replace('.', '')) !=
         getattr(_psplatform.cext, 'version', None)):
     msg = "version conflict: %r C extension module was built for another " \
-          "version of psutil (different than %s)" % (_psplatform.cext.__file__,
-                                                     __version__)
+          "version of psutil" % getattr(_psplatform.cext, "__file__")
+    if hasattr(_psplatform.cext, 'version'):
+        msg += " (%s instead of %s)" % (
+            '.'.join([x for x in str(_psplatform.cext.version)]), __version__)
+    else:
+        msg += " (different than %s)" % __version__
+    msg += "; you may try to 'pip uninstall psutil', manually remove %s" % (
+        getattr(_psplatform.cext, "__file__",
+                "the existing psutil install directory"))
+    msg += " or clean the virtual env somehow, then reinstall"
     raise ImportError(msg)