pytoolz/cytoolz — pull request #12 by eriknw (2014-04-16 16:00:28+00:00)
Title: Add tests to ensure None is safe input.  Addresses #6.

Arguments that are strongly typed Python object (like `dict`) may also be None. Although many C API functions check for type, some don't, and passing None may result in an uncatchable SystemError or possibly a segfault on some systems. This actually turned out to be a very minor issue, but is one we should continue to test for.