From ef2b2f0ad7531a0537f283974add29807bd363eb Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Fri, 16 Oct 2015 12:23:43 +0200
Subject: [PATCH] fix confusing error message if there was an ImportError
inside kwant._system
---
kwant/__init__.py | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/kwant/__init__.py b/kwant/__init__.py
index 59bd4e0f..c45de3fd 100644
--- a/kwant/__init__.py
+++ b/kwant/__init__.py
@@ -13,10 +13,15 @@ import numpy # Needed by C. Gohlke's Windows package.
try:
from . import _system
except ImportError:
- msg = """Error importing Kwant: You should not try to import Kwant from
- its source directory. Please exit the Kwant source distribution directory,
- and relaunch your Python intepreter from there."""
- raise ImportError(msg)
+ import inspect
+ if len(inspect.trace()) == 1:
+ msg = """Error importing Kwant:
+ You should not try to import Kwant from its source directory.
+ Please exit the Kwant source distribution directory, and relaunch
+ your Python intepreter from there."""
+ raise ImportError(msg)
+ else:
+ raise
from ._common import KwantDeprecationWarning
__all__.append('KwantDeprecationWarning')
--
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