From baae47024cc92386fc7efcd2f1ab435d11e5d45e Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Tue, 8 Apr 2014 11:42:57 +0200
Subject: [PATCH] provide clear error message when trying to import from the
source distribution
---
kwant/__init__.py | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/kwant/__init__.py b/kwant/__init__.py
index 68157b4..b06661c 100644
--- a/kwant/__init__.py
+++ b/kwant/__init__.py
@@ -8,6 +8,14 @@
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 tree, and relaunch
+ your Python intepreter from there."""
+ raise ImportError(msg)
+
__all__ = ['system', 'version', 'builder', 'lattice', 'solvers',
'digest', 'rmt']
for module in __all__:
--
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