Bump pylint from 2.8.2 to 2.9.3

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.8.2 to 2.9.3.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/main/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/v2.8.2...v2.9.3)

---
updated-dependencies:
- dependency-name: pylint
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  reviewers:
+  - fronzbot

.github/stale.yml

@@ -1,5 +1,5 @@
 # Number of days of inactivity before an issue becomes stale
-daysUntilStale: 60
+daysUntilStale: 30
 
 # Number of days of inactivity before a stale issue is closed
 daysUntilClose: 7
@@ -8,7 +8,8 @@ daysUntilClose: 7
 exemptLabels:
   - Priority
   - bug
-  - Help Wanted
+  - help wanted
+  - feature request
 
 # Set to true to ignore issues in a project (defaults to false)
 exemptProjects: true

.github/workflows/lint.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8]
+        python-version: [3.9]
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v1
       with:
-        python-version: '3.7'
+        python-version: '3.8'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/tests.yml

@@ -10,11 +10,11 @@ jobs:
   build:
     runs-on: ${{ matrix.platform }}
     strategy:
-      max-parallel: 3
+      max-parallel: 4
       matrix:
         platform:
           - ubuntu-latest
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2

.gitignore

@@ -14,3 +14,4 @@ build/*
 docs/_build
 *.log
 venv
+.session*

.gitlab-ci.yml

@@ -1,25 +0,0 @@
-image: python
-
-stages:
-    - test
-
-before_script:
-    - curl -O https://bootstrap.pypa.io/get-pip.py
-    - python get-pip.py
-    - pip install tox
-
-python35:
-    image: python:3.5
-    stage: test
-    script: tox -e py35
-           
-python36:
-    image: python:3.6
-    stage: test
-    script: tox -e py36
-
-lint:
-    image: python:3.6
-    stage: test
-    script: tox -e lint
-

CHANGES.rst

@@ -4,6 +4,61 @@ Changelog
 
 A list of changes between each release
 
+0.17.1 (2021-02-18)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- Add delay parameter to Blink.download_videos method in order to throttle API during video retrieval (`#437 <https://github.com/fronzbot/blinkpy/pull/437>`__)
+- Bump pylint to 2.6.2
+
+
+0.17.0 (2021-02-15)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+**Bugfixes:**
+- Fix video downloading bug (`#424 <https://github.com/fronzbot/blinkpy/pull/424>`__)
+- Fix repeated authorization email bug (`#432 <https://github.com/fronzbot/blinkpy/pull/432>`__ and `#428 <https://github.com/fronzbot/blinkpy/pull/428>`__)
+
+**New Features:**
+- Add logout method (`#429 <https://github.com/fronzbot/blinkpy/pull/429>`__)
+- Add camera record method (`#430 <https://github.com/fronzbot/blinkpy/pull/430>`__)
+
+**Other:**
+- Add debug script to main repo to help with general debug
+- Upgrade login endpoint from v4 to v5
+- Add python 3.9 support
+- Bump coverage to 5.4
+- Bump pytest to 6.2.2
+- Bump pytest-cov to 2.11.1
+- Bump pygments to 2.8.0
+- Bump pre-commit to 2.10.1
+- Bump restructuredtext-lint to 1.3.2
+
+
+0.16.4 (2020-11-22)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+**Bugfixes:**
+
+- Updated liveview endpoint (`#389 <https://github.com/fronzbot/blinkpy/pull/389>`__)
+- Fixed mini thumbnail not updating (`#388 <https://github.com/fronzbot/blinkpy/pull/388>`__)
+- Add exception catch to prevent NoneType error on refresh, added test to check behavior as well (`#401 <https://github.com/fronzbot/blinkpy/pull/401>`__)
+  - Unrelated: had to add two force methods to refresh for testing purposes. Should not change normal usage.
+- Fix malformed stream url (`#395 <https://github.com/fronzbot/blinkpy/pull/395>`__)
+
+**All:**
+
+- Moved testtools to requirements_test.txt (`#387 <https://github.com/fronzbot/blinkpy/pull/387>`__)
+- Bumped pytest to 6.1.1
+- Bumped flake8 to 3.8.4
+- Fixed README spelling ((`#381 <https://github.com/fronzbot/blinkpy/pull/381>`__) via @rohitsud)
+- Bumped pygments to 2.7.1
+- Bumped coverage to 5.3
+- Bumped pydocstyle to 5.1.1
+- Bumped pre-commit to 2.7.1
+- Bumped pylint to 2.6.0
+- Bumped pytest-cov to 2.10.1
+
+
 0.16.3 (2020-08-02)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

README.rst

@@ -174,13 +174,13 @@ Similar methods exist for individual cameras:
 
 Download videos
 ----------------
-You can also use this library to download all videos from the server.  In order to do this, you must specify a ``path``.  You may also specifiy a how far back in time to go to retrieve videos via the ``since=`` variable (a simple string such as ``"2017/09/21"`` is sufficient), as well as how many pages to traverse via the ``stop=`` variable.  Note that by default, the library will search the first ten pages which is sufficient in most use cases.  Additionally, you can specify one or more cameras via the ``camera=`` property.  This can be a single string indicating the name of the camera, or a list of camera names.  By default, it is set to the string ``'all'`` to grab videos from all cameras.
+You can also use this library to download all videos from the server.  In order to do this, you must specify a ``path``.  You may also specifiy a how far back in time to go to retrieve videos via the ``since=`` variable (a simple string such as ``"2017/09/21"`` is sufficient), as well as how many pages to traverse via the ``stop=`` variable.  Note that by default, the library will search the first ten pages which is sufficient in most use cases.  Additionally, you can specify one or more cameras via the ``camera=`` property.  This can be a single string indicating the name of the camera, or a list of camera names.  By default, it is set to the string ``'all'`` to grab videos from all cameras. If you are downloading many items, setting the ``delay`` parameter is advised in order to throttle sequential calls to the API. By default this is set to ``1`` but can be any integer representing the number of seconds to delay between calls.
 
-Example usage, which downloads all videos recorded since July 4th, 2018 at 9:34am to the ``/home/blink`` directory:
+Example usage, which downloads all videos recorded since July 4th, 2018 at 9:34am to the ``/home/blink`` directory with a 2s delay between calls:
 
 .. code:: python
 
-    blink.download_videos('/home/blink', since='2018/07/04 09:34')
+    blink.download_videos('/home/blink', since='2018/07/04 09:34', delay=2)
 
 
 .. |Build Status| image:: https://github.com/fronzbot/blinkpy/workflows/build/badge.svg

blinkpy/api.py

@@ -23,18 +23,16 @@ def request_login(
     headers = {
         "Host": DEFAULT_URL,
         "Content-Type": "application/json",
-        "Accept": "/",
         "user-agent": DEFAULT_USER_AGENT,
     }
     data = dumps(
         {
             "email": login_data["username"],
             "password": login_data["password"],
-            "notification_key": login_data["notification_key"],
             "unique_id": login_data["uid"],
             "device_identifier": login_data["device_id"],
             "client_name": "Computer",
-            "reauth": "false",
+            "reauth": True,
         }
     )
 
@@ -57,6 +55,12 @@ def request_verify(auth, blink, verify_key):
     )
 
 
+def request_logout(blink):
+    """Logout of blink servers."""
+    url = f"{blink.urls.base_url}/api/v4/account/{blink.account_id}/client/{blink.client_id}/logout"
+    return http_post(blink, url=url)
+
+
 def request_networks(blink):
     """Request all networks information."""
     url = f"{blink.urls.base_url}/networks"

blinkpy/auth.py

@@ -58,7 +58,11 @@ class Auth:
         """Return authorization header."""
         if self.token is None:
             return None
-        return {"TOKEN_AUTH": self.token, "user-agent": DEFAULT_USER_AGENT}
+        return {
+            "TOKEN_AUTH": self.token,
+            "user-agent": DEFAULT_USER_AGENT,
+            "content-type": "application/json",
+        }
 
     def create_session(self, opts=None):
         """Create a session for blink communication."""
@@ -104,8 +108,12 @@ class Auth:
             if response.status_code == 200:
                 return response.json()
             raise LoginError
-        except AttributeError:
+        except AttributeError as error:
-            raise LoginError
+            raise LoginError from error
+
+    def logout(self, blink):
+        """Log out."""
+        return api.request_logout(blink)
 
     def refresh_token(self):
         """Refresh auth token."""
@@ -115,21 +123,21 @@ class Auth:
             self.login_response = self.login()
             self.extract_login_info()
             self.is_errored = False
-        except LoginError:
+        except LoginError as error:
             _LOGGER.error("Login endpoint failed. Try again later.")
-            raise TokenRefreshFailed
+            raise TokenRefreshFailed from error
-        except (TypeError, KeyError):
+        except (TypeError, KeyError) as error:
             _LOGGER.error("Malformed login response: %s", self.login_response)
-            raise TokenRefreshFailed
+            raise TokenRefreshFailed from error
         return True
 
     def extract_login_info(self):
         """Extract login info from login response."""
-        self.region_id = self.login_response["region"]["tier"]
+        self.region_id = self.login_response["account"]["tier"]
         self.host = f"{self.region_id}.{BLINK_URL}"
-        self.token = self.login_response["authtoken"]["authtoken"]
+        self.token = self.login_response["auth"]["token"]
-        self.client_id = self.login_response["client"]["id"]
+        self.client_id = self.login_response["account"]["client_id"]
-        self.account_id = self.login_response["account"]["id"]
+        self.account_id = self.login_response["account"]["account_id"]
 
     def startup(self):
         """Initialize tokens for communication."""
@@ -151,8 +159,8 @@ class Auth:
             json_data = response.json()
         except KeyError:
             pass
-        except (AttributeError, ValueError):
+        except (AttributeError, ValueError) as error:
-            raise BlinkBadResponse
+            raise BlinkBadResponse from error
 
         self.is_errored = False
         return json_data
@@ -227,6 +235,9 @@ class Auth:
             try:
                 json_resp = response.json()
                 blink.available = json_resp["valid"]
+                if not json_resp["valid"]:
+                    _LOGGER.error("%s", json_resp["message"])
+                    return False
             except (KeyError, TypeError):
                 _LOGGER.error("Did not receive valid response from server.")
                 return False
@@ -235,7 +246,7 @@ class Auth:
     def check_key_required(self):
         """Check if 2FA key is required."""
         try:
-            if self.login_response["client"]["verification_required"]:
+            if self.login_response["account"]["client_verification_required"]:
                 return True
         except (KeyError, TypeError):
             pass

blinkpy/blinkpy.py

@@ -264,7 +264,9 @@ class Blink:
         """Save login data to file."""
         util.json_save(self.auth.login_attributes, file_name)
 
-    def download_videos(self, path, since=None, camera="all", stop=10, debug=False):
+    def download_videos(
+        self, path, since=None, camera="all", stop=10, delay=1, debug=False
+    ):
         """
         Download all videos from server since specified time.
 
@@ -275,6 +277,7 @@ class Blink:
         :param camera: Camera name to retrieve.  Defaults to "all".
                        Use a list for multiple cameras.
         :param stop: Page to stop on (~25 items per page. Default page 10).
+        :param delay: Number of seconds to wait in between subsequent video downloads.
         :param debug: Set to TRUE to prevent downloading of items.
                       Instead of downloading, entries will be printed to log.
         """
@@ -301,9 +304,9 @@ class Blink:
                 _LOGGER.info("No videos found on page %s. Exiting.", page)
                 break
 
-            self._parse_downloaded_items(result, camera, path, debug)
+            self._parse_downloaded_items(result, camera, path, delay, debug)
 
-    def _parse_downloaded_items(self, result, camera, path, debug):
+    def _parse_downloaded_items(self, result, camera, path, delay, debug):
         """Parse downloaded videos."""
         for item in result:
             try:
@@ -351,6 +354,8 @@ class Blink:
                         "Address: {address}, Filename: {filename}"
                     )
                 )
+            if delay > 0:
+                time.sleep(delay)
 
 
 class BlinkSetupError(Exception):

blinkpy/camera.py

@@ -98,6 +98,10 @@ class BlinkCamera:
             self.sync.blink, self.network_id, self.camera_id
         )
 
+    def record(self):
+        """Initiate clip recording."""
+        return api.request_new_video(self.sync.blink, self.network_id, self.camera_id)
+
     def get_media(self, media_type="image"):
         """Download media (image or video)."""
         url = self.thumbnail

blinkpy/helpers/constants.py

@@ -3,8 +3,8 @@
 import os
 
 MAJOR_VERSION = 0
-MINOR_VERSION = 17
+MINOR_VERSION = 18
-PATCH_VERSION = "0.dev1"
+PATCH_VERSION = "0.dev0"
 
 __version__ = f"{MAJOR_VERSION}.{MINOR_VERSION}.{PATCH_VERSION}"
 
@@ -34,6 +34,7 @@ PROJECT_CLASSIFIERS = [
     "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
     "Topic :: Home Automation",
 ]
 
@@ -48,7 +49,7 @@ URLS
 BLINK_URL = "immedia-semi.com"
 DEFAULT_URL = f"rest-prod.{BLINK_URL}"
 BASE_URL = f"https://{DEFAULT_URL}"
-LOGIN_ENDPOINT = f"{BASE_URL}/api/v4/account/login"
+LOGIN_ENDPOINT = f"{BASE_URL}/api/v5/account/login"
 
 """
 Dictionaries

blinkpy/helpers/util.py

@@ -33,10 +33,13 @@ def json_save(data, file_name):
         json.dump(data, json_file, indent=4)
 
 
-def gen_uid(size):
+def gen_uid(size, uid_format=False):
     """Create a random sring."""
-    full_token = secrets.token_hex(size)
+    if uid_format:
-    return full_token[0:size]
+        token = f"BlinkCamera_{secrets.token_hex(4)}-{secrets.token_hex(2)}-{secrets.token_hex(2)}-{secrets.token_hex(2)}-{secrets.token_hex(6)}"
+    else:
+        token = secrets.token_hex(size)
+    return token
 
 
 def time_to_seconds(timestamp):
@@ -79,10 +82,7 @@ def prompt_login_data(data):
 
 def validate_login_data(data):
     """Check for missing keys."""
-    data["uid"] = data.get("uid", gen_uid(const.SIZE_UID))
+    data["uid"] = data.get("uid", gen_uid(const.SIZE_UID, uid_format=True))
-    data["notification_key"] = data.get(
-        "notification_key", gen_uid(const.SIZE_NOTIFICATION_KEY)
-    )
     data["device_id"] = data.get("device_id", const.DEVICE_ID)
 
     return data

debug_login.py

@@ -0,0 +1,77 @@
+"""Login testing script."""
+import sys
+import os
+from blinkpy.blinkpy import Blink
+from blinkpy.auth import Auth
+from blinkpy.helpers.util import json_load, json_save
+
+save_session = False
+print("")
+print("Blink Login Debug Script ...")
+print(" ... Loading previous session information.")
+cwd = os.getcwd()
+print(f" ... Looking in {cwd}.")
+session_path = os.path.join(cwd, ".session_debug")
+session = json_load(session_path)
+
+try:
+    auth_file = session["file"]
+except (TypeError, KeyError):
+    print(" ... Please input location of auth file")
+    auth_file = input("     Must contain username and password: ")
+    save_session = True
+
+data = json_load(auth_file)
+if data is None:
+    print(f" ... Please fix file contents of {auth_file}.")
+    print(" ... Exiting.")
+    sys.exit(1)
+
+try:
+    username = data["username"]
+    password = data["password"]
+except KeyError:
+    print(f" ... File contents of {auth_file} incorrect.")
+    print(" ... Require username and password at minimum.")
+    print(" ... Exiting.")
+    sys.exit(1)
+
+if save_session:
+    print(f" ... Saving session file to {session_path}.")
+    json_save({"file": auth_file}, session_path)
+
+blink = Blink()
+auth = Auth(data)
+blink.auth = auth
+
+print(" ... Starting Blink.")
+print("")
+blink.start()
+print("")
+print(" ... Printing login response.")
+print("")
+print(blink.auth.login_response)
+print("")
+print(" ... Printing login attributes.")
+print("")
+print(blink.auth.login_attributes)
+print("")
+input(" ... Press any key to continue: ")
+print(" ... Deactivating auth token.")
+blink.auth.token = "foobar"
+print(f"\t - blink.auth.token = {blink.auth.token}")
+
+print(" ... Attempting login.")
+print("")
+blink.start()
+print("")
+print(" ... Printing login response.")
+print("")
+print(blink.auth.login_response)
+print("")
+print(" ... Printing login attributes.")
+print("")
+print(blink.auth.login_attributes)
+print("")
+rint(" ... Done.")
+print("")

requirements_test.txt

@@ -1,14 +1,14 @@
 black==19.10b0
-coverage==5.3
+coverage==5.5
-flake8==3.8.4
+flake8==3.9.1
-flake8-docstrings==1.5.0
+flake8-docstrings==1.6.0
-pre-commit==2.7.1
+pre-commit==2.12.1
-pylint==2.6.0
+pylint==2.9.3
-pydocstyle==5.1.1
+pydocstyle==6.0.0
-pytest==6.1.1
+pytest==6.2.4
-pytest-cov==2.10.1
+pytest-cov==2.11.1
 pytest-sugar==0.9.4
 pytest-timeout==1.4.2
-restructuredtext-lint==1.3.1
+restructuredtext-lint==1.3.2
-pygments==2.7.1
+pygments==2.9.0
 testtools>=2.4.0

tests/test_auth.py

@@ -42,7 +42,6 @@ class TestAuth(unittest.TestCase):
             "username": "foo",
             "password": "bar",
             "uid": 1234,
-            "notification_key": 1234,
             "device_id": const.DEVICE_ID,
         }
         self.assertDictEqual(auth.data, expected_data)
@@ -62,7 +61,6 @@ class TestAuth(unittest.TestCase):
             "username": "foo",
             "password": "bar",
             "uid": 1234,
-            "notification_key": 1234,
             "device_id": const.DEVICE_ID,
         }
         self.assertDictEqual(auth.data, expected_data)
@@ -128,7 +126,11 @@ class TestAuth(unittest.TestCase):
     def test_header(self):
         """Test header data."""
         self.auth.token = "bar"
-        expected_header = {"TOKEN_AUTH": "bar", "user-agent": const.DEFAULT_USER_AGENT}
+        expected_header = {
+            "TOKEN_AUTH": "bar",
+            "user-agent": const.DEFAULT_USER_AGENT,
+            "content-type": "application/json",
+        }
         self.assertDictEqual(self.auth.header, expected_header)
 
     def test_header_no_token(self):
@@ -161,10 +163,8 @@ class TestAuth(unittest.TestCase):
     def test_refresh_token(self, mock_login):
         """Test refresh token method."""
         mock_login.return_value = {
-            "region": {"tier": "test"},
+            "account": {"account_id": 5678, "client_id": 1234, "tier": "test"},
-            "authtoken": {"authtoken": "foobar"},
+            "auth": {"token": "foobar"},
-            "client": {"id": 1234},
-            "account": {"id": 5678},
         }
         self.assertTrue(self.auth.refresh_token())
         self.assertEqual(self.auth.region_id, "test")
@@ -186,12 +186,19 @@ class TestAuth(unittest.TestCase):
         self.auth.login_response = {}
         self.assertFalse(self.auth.check_key_required())
 
-        self.auth.login_response = {"client": {"verification_required": False}}
+        self.auth.login_response = {"account": {"client_verification_required": False}}
         self.assertFalse(self.auth.check_key_required())
 
-        self.auth.login_response = {"client": {"verification_required": True}}
+        self.auth.login_response = {"account": {"client_verification_required": True}}
         self.assertTrue(self.auth.check_key_required())
 
+    @mock.patch("blinkpy.auth.api.request_logout")
+    def test_logout(self, mock_req):
+        """Test logout method."""
+        mock_blink = MockBlink(None)
+        mock_req.return_value = True
+        self.assertTrue(self.auth.logout(mock_blink))
+
     @mock.patch("blinkpy.auth.api.request_verify")
     def test_send_auth_key(self, mock_req):
         """Check sending of auth key."""

tests/test_blink_functions.py

@@ -2,6 +2,7 @@
 import unittest
 from unittest import mock
 import logging
+import time
 
 from blinkpy import blinkpy
 from blinkpy.sync_module import BlinkSyncModule
@@ -88,9 +89,33 @@ class TestBlinkFunctions(unittest.TestCase):
             "DEBUG:blinkpy.blinkpy:foo: /bar.mp4 is marked as deleted.",
         ]
         with self.assertLogs() as dl_log:
-            blink.download_videos("/tmp", stop=2)
+            blink.download_videos("/tmp", stop=2, delay=0)
         self.assertEqual(dl_log.output, expected_log)
 
+    @mock.patch("blinkpy.blinkpy.api.request_videos")
+    def test_parse_downloaded_throttle(self, mock_req):
+        """Test ability to parse downloaded items list."""
+        generic_entry = {
+            "created_at": "1970",
+            "device_name": "foo",
+            "deleted": False,
+            "media": "/bar.mp4",
+        }
+        result = [generic_entry]
+        mock_req.return_value = {"media": result}
+        self.blink.last_refresh = 0
+        start = time.time()
+        self.blink.download_videos("/tmp", stop=2, delay=0, debug=True)
+        now = time.time()
+        delta = now - start
+        self.assertTrue(delta < 0.1)
+
+        start = time.time()
+        self.blink.download_videos("/tmp", stop=2, delay=0.1, debug=True)
+        now = time.time()
+        delta = now - start
+        self.assertTrue(delta >= 0.1)
+
     @mock.patch("blinkpy.blinkpy.api.request_videos")
     def test_parse_camera_not_in_list(self, mock_req):
         """Test ability to parse downloaded items list."""
@@ -113,7 +138,7 @@ class TestBlinkFunctions(unittest.TestCase):
             "DEBUG:blinkpy.blinkpy:Skipping videos for foo.",
         ]
         with self.assertLogs() as dl_log:
-            blink.download_videos("/tmp", camera="bar", stop=2)
+            blink.download_videos("/tmp", camera="bar", stop=2, delay=0)
         self.assertEqual(dl_log.output, expected_log)
 
     @mock.patch("blinkpy.blinkpy.api.request_network_update")

tests/test_util.py

@@ -3,7 +3,7 @@
 import unittest
 from unittest import mock
 import time
-from blinkpy.helpers.util import json_load, Throttle, time_to_seconds
+from blinkpy.helpers.util import json_load, Throttle, time_to_seconds, gen_uid
 
 
 class TestUtil(unittest.TestCase):
@@ -132,3 +132,19 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(json_load("fake.file"), None)
         with mock.patch("builtins.open", mock.mock_open(read_data="")):
             self.assertEqual(json_load("fake.file"), None)
+
+    def test_gen_uid(self):
+        """Test gen_uid formatting."""
+        val1 = gen_uid(8)
+        val2 = gen_uid(8, uid_format=True)
+
+        self.assertEqual(len(val1), 16)
+
+        self.assertTrue(val2.startswith("BlinkCamera_"))
+        val2_cut = val2.split("_")
+        val2_split = val2_cut[1].split("-")
+        self.assertEqual(len(val2_split[0]), 8)
+        self.assertEqual(len(val2_split[1]), 4)
+        self.assertEqual(len(val2_split[2]), 4)
+        self.assertEqual(len(val2_split[3]), 4)
+        self.assertEqual(len(val2_split[4]), 12)

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = build, py36, py37, py38, lint
+envlist = build, py36, py37, py38, py39, lint
 skip_missing_interpreters = True
 skipsdist = True