Run black code formatter and flake8

rbackup/package_managers/packagemanager.py

@@ -28,7 +28,10 @@ class PackageManager:
         :param db_path: path to the package manager database
         :type db_path: str or path-like object
         :param pkglist_cmd: command to list installed packages to stdout
-        :type pkglist_cmd: list
+        :type pkglist_cmd: str or iterable of str
+        :raises: TypeError if pkglist_cmd is not str or an iterable of str
+        :raises: ValueError if pkglist_cmd is an empty str or an iterable
+            containing an empty str
         """
         if not isinstance(pkglist_cmd, Iterable) or isinstance(pkglist_cmd, dict):
             raise TypeError("pkglist_cmd is the wrong type")

rbackup/tests/test_packagemanager.py

@@ -6,13 +6,13 @@ import doctest
 import subprocess
 import unittest
 
-from hypothesis import given, note
+from hypothesis import given
 from hypothesis.strategies import (
     booleans,
     dictionaries,
+    from_regex,
     integers,
     iterables,
-    lists,
     one_of,
     none,
     text,
@@ -62,7 +62,7 @@ class TestCreatePackageManager(unittest.TestCase):
         with self.assertRaises(ValueError):
             PackageManager("nothing", "nothing", [])
             PackageManager("nothing", "nothing", set())
-            PackageManager("nothing", "nothing", '')
+            PackageManager("nothing", "nothing", "")
 
     @given(iterables(one_of(none(), booleans(), integers()), min_size=1))
     def test_wrong_iterable_element_type(self, cmd):
@@ -71,8 +71,8 @@ class TestCreatePackageManager(unittest.TestCase):
 
     def test_empty_str_in_iterable(self):
         with self.assertRaises(ValueError):
-            PackageManager("nothing", "nothing", [''])
-            PackageManager("nothing", "nothing", ['pacman', ''])
+            PackageManager("nothing", "nothing", [""])
+            PackageManager("nothing", "nothing", ["pacman", ""])
 
     def tearDown(self):
         self.patched_path.stop()