travis's pep8 check is grumpier than my local machine
@@ -415,6 +415,6 @@ def safe_zip(*args):
"""zip, with a guarantee that all arguments are the same length.
(normal zip silently drops entries to make them the same length)
"""
- l = len(args[0])
- assert all(len(arg) == l for arg in args)
+ length = len(args[0])
+ assert all(len(arg) == length for arg in args)
return zip(*args)
