add pyflakes job, make tree mostly pyflakes-clean

The remaining error is in six.py, which will go away soon.

1 files changed, 4 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index a91eb40..0e3cea2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,3 +15,7 @@ commands = coverage run -m pytest {posargs:src/ecdsa}
 
 [testenv:speed]
 commands = {envpython} speed.py
+
+[testenv:codechecks]
+deps = pyflakes
+commands = pyflakes setup.py speed.py src