remove some pre-3.8 workarounds (#7671)

.github/workflows/tests.yml

@@ -45,10 +45,7 @@ jobs:
     - name: Install yt-dlp
       run: |
         case "${{ matrix.python-version }}" in
-            3.4|3.5)
-                # don't install yt-dlp
-                ;;
-            3.6|3.7|3.8)
+            3.8)
                 # install from PyPI
                 pip install yt-dlp
                 ;;
@@ -60,14 +57,7 @@ jobs:
 
     - name: Lint with flake8
       run: |
-        case "${{ matrix.python-version }}" in
-            3.4|3.5|3.6|3.7)
-                flake8 --extend-exclude scripts/export_tests.py,scripts/pyprint.py .
-                ;;
-            *)
-                flake8 .
-                ;;
-        esac
+        flake8 .
 
     - name: Run tests
       run: |

docs/configuration.rst

@@ -78,8 +78,8 @@ Description
 
     If this is an ``object``, it must contain Python expressions mapping to the
     filename format strings to use.
-    These expressions are evaluated in the order as specified in Python 3.6+
-    and in an undetermined order in Python 3.4 and 3.5.
+    These expressions are evaluated in the specified order until one evaluates
+    to ``True``.
 
     The available replacement keys depend on the extractor used. A list
     of keys for a specific one can be acquired by calling *gallery-dl*

gallery_dl/text.py

@@ -317,12 +317,7 @@ else:
 def parse_datetime(date_string, format="%Y-%m-%dT%H:%M:%S%z", utcoffset=0):
     """Create a datetime object by parsing 'date_string'"""
     try:
-        if format.endswith("%z") and date_string[-3] == ":":
-            # workaround for Python < 3.7: +00:00 -> +0000
-            ds = date_string[:-3] + date_string[-2:]
-        else:
-            ds = date_string
-        d = datetime.datetime.strptime(ds, format)
+        d = datetime.datetime.strptime(date_string, format)
         o = d.utcoffset()
         if o is not None:
             # convert to naive UTC

test/test_extractor.py

@@ -198,7 +198,6 @@ class TestExtractorModule(unittest.TestCase):
             extr.initialize()
             extr.finalize()
 
-    @unittest.skipIf(sys.hexversion < 0x3060000, "test fails in CI")
     def test_init_ytdl(self):
         try:
             extr = extractor.find("ytdl:")

test/test_formatter.py

@@ -66,10 +66,7 @@ class TestFormatter(unittest.TestCase):
         self._run_test("{t!d}", datetime.datetime(2010, 1, 1))
         self._run_test("{t!d:%Y-%m-%d}", "2010-01-01")
         self._run_test("{t!D}" , datetime.datetime(2010, 1, 1))
-        if sys.hexversion >= 0x3070000:
-            self._run_test("{ds!D}", datetime.datetime(2010, 1, 1))
-        else:
-            self._run_test("{ds!D}", datetime.datetime(1970, 1, 1))
+        self._run_test("{ds!D}", datetime.datetime(2010, 1, 1))
         self._run_test("{dt!D}", datetime.datetime(2010, 1, 1))
         self._run_test("{t!D:%Y-%m-%d}", "2010-01-01")
         self._run_test("{dt!T}", "1262304000")
@@ -427,7 +424,6 @@ class TestFormatter(unittest.TestCase):
         self._run_test("\fE name * 2 + ' ' + a", "{}{} {}".format(
             self.kwdict["name"], self.kwdict["name"], self.kwdict["a"]))
 
-    @unittest.skipIf(sys.hexversion < 0x3060000, "no fstring support")
     def test_fstring(self):
         self._run_test("\fF {a}", self.kwdict["a"])
         self._run_test("\fF {name}{name} {a}", "{}{} {}".format(
@@ -435,7 +431,6 @@ class TestFormatter(unittest.TestCase):
         self._run_test("\fF foo-'\"{a.upper()}\"'-bar",
                        """foo-'"{}"'-bar""".format(self.kwdict["a"].upper()))
 
-    @unittest.skipIf(sys.hexversion < 0x3060000, "no fstring support")
     def test_template_fstring(self):
         with tempfile.TemporaryDirectory() as tmpdirname:
             path1 = os.path.join(tmpdirname, "tpl1")

test/test_postprocessor.py

@@ -377,9 +377,7 @@ class MetadataTest(BasePostprocessorTest):
         path = self.pathfmt.realpath + ".JSON"
         m.assert_called_once_with(path, "w", encoding="utf-8")
 
-        if sys.hexversion >= 0x3060000:
-            # python 3.4 & 3.5 have random order without 'sort: True'
-            self.assertEqual(self._output(m), """{
+        self.assertEqual(self._output(m), """{
     "category": "test",
     "filename": "file",
     "extension": "ext",

test/test_util.py

@@ -794,8 +794,6 @@ value = 123
         self.assertEqual(f(["a", "b", "c"]), "a, b, c")
         self.assertEqual(f([1, 2, 3]), "1, 2, 3")
 
-    @unittest.skipIf(sys.hexversion < 0x3070000,
-                     "datetime.fromisoformat")
     def test_to_datetime(self, f=util.to_datetime):
 
         def _assert(value, expected):
@@ -1017,11 +1015,7 @@ value = 123
 
         self.assertIsNot(p1, p2)
         self.assertIs(p2, p3)
-
-        if sys.hexversion >= 0x3060000:
-            self.assertEqual(p1, p2)
-        else:
-            self.assertEqual(repr(p1), repr(p2))
+        self.assertEqual(p1, p2)
 
 
 class TestExtractor():