if RE_BASE.search(filename):
base_template_count += 1
- assert base_template_count == 1, (
- 'must be 1 "*_base_*" in %s not %d' % (
- filenames,
- base_template_count))
+ msg = 'must be 1 "*_base_*" in %s not %d' % (filenames, base_template_count)
+ assert base_template_count == 1, msg