capture special case early instead of failing

2021-08-16 13:24:34 -04:00 · 2021-08-16 13:24:34 -04:00 · 728e50f79e
parent b754617c76
commit 728e50f79e
1 changed files with 2 additions and 0 deletions
--- a/python/damask/util.py
+++ b/python/damask/util.py
@ -375,6 +375,8 @@ def shapeshifter(fro,to,mode='left',keep_ones=False):


    """
+    if not len(fro) and not len(to): return ()
+
    beg = dict(left ='(^.*\\b)',
               right='(^.*?\\b)')
    sep = dict(left ='(.*\\b)',