update pep484 tests

staticmethod can now be type-qualified, so static checkers
are complaining.  however we don't want to do that here
because it's going to fail in Python 3.7.   just use
an ignore type for the one place we do this right now.

Add pep484 tox target as we are getting jenkins to
target this for all projects.

Change-Id: Ic4db0fc7dd0bfe01308027c911f4dcb288bb169e

2 files changed, 13 insertions, 5 deletions

diff --git a/dogpile/cache/api.py b/dogpile/cache/api.py
index f54bd68..0717d43 100644
--- a/dogpile/cache/api.py
+++ b/dogpile/cache/api.py
@@ -152,7 +152,7 @@ class CacheBackend:
 
     """
 
-    serializer: Union[None, Serializer, staticmethod] = None
+    serializer: Union[None, Serializer] = None
     """Serializer function that will be used by default if not overridden
     by the region.
 
@@ -160,7 +160,7 @@ class CacheBackend:
 
     """
 
-    deserializer: Union[None, Deserializer, staticmethod] = None
+    deserializer: Union[None, Deserializer] = None
     """deserializer function that will be used by default if not overridden
     by the region.
 
@@ -446,10 +446,10 @@ class CacheBackend:
 
 
 class DefaultSerialization:
-    serializer: Union[None, Serializer, staticmethod] = staticmethod(
+    serializer: Union[None, Serializer] = staticmethod(  # type: ignore
         pickle.dumps
     )
-    deserializer: Union[None, Deserializer, staticmethod] = staticmethod(
+    deserializer: Union[None, Deserializer] = staticmethod(  # type: ignore
         pickle.loads
     )
 
diff --git a/tox.ini b/tox.ini
index 59715fb..d11ecd4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -51,7 +51,8 @@ commands=
 sitepackages=False
 usedevelop=True
 
-[testenv:mypy]
+
+[testenv:pep484]
 basepython = python3
 deps=
     mypy
@@ -64,6 +65,13 @@ deps=
     types-decorator
 commands = mypy ./dogpile/
 
+[testenv:mypy]
+basepython = python3
+deps=
+    {[testenv:pep484]deps}
+commands = mypy ./dogpile/
+
+
 # thanks to https://julien.danjou.info/the-best-flake8-extensions/
 [testenv:pep8]
 basepython = python3