Add support for python 3.8

.travis.yml

@@ -19,6 +19,8 @@ matrix:
       env: TOXENV=py36
     - python: "3.7"
       env: TOXENV=py37
+    - python: "3.8"
+      env: TOXENV=py38
       dist: xenial
       sudo: true
 

HISTORY.rst

@@ -9,6 +9,10 @@ History
 * ``cattrs`` has improved type annotations for use with Mypy.
 * Unstructuring sets and frozensets now works properly.
 
+0.9.1 (2019-10-26)
+------------------
+* Python 3.8 support.
+
 0.9.0 (2018-07-22)
 ------------------
 * Python 3.7 support.

setup.py

@@ -55,5 +55,6 @@
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
     ],
 )

src/cattr/_compat.py

@@ -13,6 +13,7 @@
 is_py2 = version_info[0] == 2
 is_py3 = version_info[0] == 3
 is_py37 = version_info[:2] == (3, 7)
+is_py38 = version_info[:2] == (3, 8)
 
 if is_py2:
     from functools32 import lru_cache
@@ -26,7 +27,7 @@
     unicode = str
     bytes = bytes
 
-if is_py37:
+if is_py37 or is_py38:
     from typing import List, Union, _GenericAlias
 
     def is_union_type(obj):

tests/_compat.py

@@ -1,6 +1,10 @@
-from cattr._compat import is_py37, is_bare
+from cattr._compat import (
+    is_py37,
+    is_py38,
+    is_bare
+)
 
-if is_py37:
+if is_py37 or is_py38:
 
     def change_type_param(cl, new_params):
         if is_bare(cl):

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, pypy, py35, pypy3, py36, py37, lint
+envlist = py27, pypy, py35, pypy3, py36, py37, py38, lint
 
 [testenv:lint]
 skip_install = true