From 06749ab56bb63e59c1dcad6fa6293395fdd9666a Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Wed, 17 May 2017 14:34:42 +0200
Subject: [PATCH] builder: for now, reset builder after a failed
fill/attach_lead
---
kwant/builder.py | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/kwant/builder.py b/kwant/builder.py
index b07409f2..137114ef 100644
--- a/kwant/builder.py
+++ b/kwant/builder.py
@@ -1349,9 +1349,11 @@ class Builder:
done.append(tail)
if len(done) > max_sites:
# The graph has unbalanced edges: delete it.
- del self.H
+ self.H = {}
+ self.leads = []
raise RuntimeError("Maximal number of sites (max_sites "
- "parameter of fill()) added.")
+ "parameter of fill()) added.\n"
+ "All sites have been deleted.")
# Make an iterator over head-value-pairs.
shift = templ_sym.which(tail)
@@ -1497,8 +1499,10 @@ class Builder:
def shape(site):
domain, = sym.which(site)
if domain < min_dom:
+ self.H = {}
raise ValueError('Builder does not interrupt the lead,'
- ' this lead cannot be attached.')
+ ' this lead cannot be attached.\n'
+ 'All sites have been deleted.')
return domain <= max_dom + 1
# We start flood-fill from the first domain that doesn't belong to the
--
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