diff --git a/streamrip/bases.py b/streamrip/bases.py
index f532985..b19fb6c 100644
--- a/streamrip/bases.py
+++ b/streamrip/bases.py
@@ -865,7 +865,7 @@ class Tracklist(list):
         :param codec:
         :param kwargs:
         """
-        if (sr := kwargs.get("sampling_rate")) :
+        if sr := kwargs.get("sampling_rate"):
             if sr < 44100:
                 logger.warning(
                     "Sampling rate %d is lower than 44.1kHz."
diff --git a/streamrip/cli.py b/streamrip/cli.py
index 41e7ba6..1131e6d 100644
--- a/streamrip/cli.py
+++ b/streamrip/cli.py
@@ -36,7 +36,7 @@ if not os.path.isdir(CACHE_DIR):
 @click.option("-t", "--text", metavar="PATH")
 @click.option("-nd", "--no-db", is_flag=True)
 @click.option("--debug", is_flag=True)
-@click.version_option(prog_name='streamrip')
+@click.version_option(prog_name="streamrip")
 @click.pass_context
 def cli(ctx, **kwargs):
     """Streamrip: The all-in-one Qobuz, Tidal, SoundCloud, and Deezer music downloader.
diff --git a/streamrip/clients.py b/streamrip/clients.py
index 1a7c17a..9d042a3 100644
--- a/streamrip/clients.py
+++ b/streamrip/clients.py
@@ -643,7 +643,7 @@ class TidalClient(Client):
             click.launch(login_link)
 
         start = time.time()
-        elapsed = 0
+        elapsed = 0.0
         while elapsed < 600:  # 5 mins to login
             elapsed = time.time() - start
             status = self._check_auth_status()
diff --git a/streamrip/config.py b/streamrip/config.py
index 88fb273..4ecc110 100644
--- a/streamrip/config.py
+++ b/streamrip/config.py
@@ -25,22 +25,14 @@ yaml = YAML()
 logger = logging.getLogger(__name__)
 
 
-# ---------- Utilities -------------
-def _set_to_none(d: dict):
-    for k, v in d.items():
-        if isinstance(v, dict):
-            _set_to_none(v)
-        else:
-            d[k] = None
-
-
 class Config:
     """Config class that handles command line args and config files.
 
     Usage:
-    >>> config = Config('test_config.yaml')
-    >>> config.defaults['qobuz']['quality']
-    3
+
+        >>> config = Config('test_config.yaml')
+        >>> config.defaults['qobuz']['quality']
+        3
 
     If test_config was already initialized with values, this will load them
     into `config`. Otherwise, a new config file is created with the default
@@ -204,7 +196,7 @@ class Config:
         if source == "tidal":
             return self.tidal_creds
         if source == "deezer" or source == "soundcloud":
-            return dict()
+            return {}
 
         raise InvalidSourceError(source)
 
@@ -348,6 +340,7 @@ class ConfigDocumentation:
 
 # ------------- ~~ Experimental ~~ ----------------- #
 
+
 def load_yaml(path: str):
     """Load a streamrip config YAML file.
 
@@ -374,33 +367,33 @@ def load_yaml(path: str):
             level += 1
 
         chars.prev()
-        if (c := next(chars)) == '#':
+        if (c := next(chars)) == "#":
             # is a comment
             continue
 
-        elif c == '-':
+        elif c == "-":
             # is an item in a list
             next(chars)
             val_l = list(chars)
             level += 2  # it is a child of the previous key
-            item_type = 'list'
+            item_type = "list"
         else:
             # undo char read
             chars.prev()
 
         if not val_l:
-            while (c := next(chars)) != ':':
+            while (c := next(chars)) != ":":
                 key_l.append(c)
-            val_l = list(''.join(chars).strip())
+            val_l = list("".join(chars).strip())
 
         if val_l:
-            val = ''.join(val_l)
+            val = "".join(val_l)
         else:
             # start of a section
-            item_type = 'dict'
+            item_type = "dict"
             val = type_dict[item_type]()
 
-        key = ''.join(key_l)
+        key = "".join(key_l)
         if level == 0:
             settings[key] = val
         elif level == 2:
@@ -424,7 +417,7 @@ class StringWalker:
         :param s:
         :type s: str
         """
-        self.__val = s.replace('\n', '')
+        self.__val = s.replace("\n", "")
         self.__pos = 0
 
     def __next__(self) -> str:
diff --git a/streamrip/constants.py b/streamrip/constants.py
index 3fac0ce..9099ca6 100644
--- a/streamrip/constants.py
+++ b/streamrip/constants.py
@@ -70,6 +70,7 @@ __MP4_KEYS = (
     "disk",
     None,
     None,
+    None,
 )
 
 __MP3_KEYS = (
@@ -93,6 +94,7 @@ __MP3_KEYS = (
     id3.TPOS,
     None,
     None,
+    None,
 )
 
 __METADATA_TYPES = (
@@ -116,6 +118,7 @@ __METADATA_TYPES = (
     "discnumber",
     "tracktotal",
     "disctotal",
+    "date",
 )
 
 
diff --git a/streamrip/utils.py b/streamrip/utils.py
index 947bcd4..ebcc135 100644
--- a/streamrip/utils.py
+++ b/streamrip/utils.py
@@ -324,11 +324,9 @@ def get_container(quality: int, source: str) -> str:
     :rtype: str
     """
     if quality >= 2:
-        container = "FLAC"
-    else:
-        if source == "tidal":
-            container = "AAC"
-        else:
-            container = "MP3"
+        return "FLAC"
 
-    return container
+    if source == "tidal":
+        return "AAC"
+
+    return "MP3"