Undefined name: tmppath --> self.tmppath

[cclauss]

$ flake8 . --count --select=E9,F63,F7,F82,Y --show-source --statistics

./rdflib/test/test_rules.py:58:27: F821 undefined name 'tmppath'
            shutil.rmtree(tmppath)
                          ^

Proposed Changes

• tmppath --> self.tmppath

[aucampia]

I think it may make sense to add some of these checks to the drone pipeline.

[cclauss]

flake8 is already run in drone but all issues are ignored. There are still two more undefined names that are head-scratchers.

[nicholascar]

Thanks @cclauss