Fix for PEP8
@@ -598,7 +598,7 @@ class _FusionHistory(object):
out_vars = var_list[nin:]
if 'out' in kwargs:
out = kwargs.pop('out')
- if len(out_vars) > 0:
+ if out_vars:
raise ValueError('cannot specify \'out\' as both a positional '
'and keyword argument')
if isinstance(out, _FusionVarArray):
