[dependencies] Create module with all dependency imports

yt_dlp/utils.py

@@ -41,7 +41,6 @@ import zlib
 
 from .compat import (
     asyncio,
-    compat_brotli,
     compat_chr,
     compat_cookiejar,
     compat_etree_fromstring,
@@ -64,18 +63,10 @@ from .compat import (
     compat_urllib_parse_urlparse,
     compat_urllib_request,
     compat_urlparse,
-    compat_websockets,
 )
+from .dependencies import brotli, certifi, websockets
 from .socks import ProxyType, sockssocket
 
-try:
-    import certifi
-
-    # The certificate may not be bundled in executable
-    has_certifi = os.path.exists(certifi.where())
-except ImportError:
-    has_certifi = False
-
 
 def register_socks_protocols():
     # "Register" SOCKS protocols
@@ -138,7 +129,7 @@ def random_user_agent():
 SUPPORTED_ENCODINGS = [
     'gzip', 'deflate'
 ]
-if compat_brotli:
+if brotli:
     SUPPORTED_ENCODINGS.append('br')
 
 std_headers = {
@@ -1267,7 +1258,7 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
     def brotli(data):
         if not data:
             return data
-        return compat_brotli.decompress(data)
+        return brotli.decompress(data)
 
     def http_request(self, req):
         # According to RFC 3986, URLs can not contain non-ASCII characters, however this is not
@@ -5231,7 +5222,7 @@ class WebSocketsWrapper():
 
     def __init__(self, url, headers=None, connect=True):
         self.loop = asyncio.events.new_event_loop()
-        self.conn = compat_websockets.connect(
+        self.conn = websockets.connect(
             url, extra_headers=headers, ping_interval=None,
             close_timeout=float('inf'), loop=self.loop, ping_timeout=float('inf'))
         if connect:
@@ -5294,9 +5285,6 @@ class WebSocketsWrapper():
                 })
 
 
-has_websockets = bool(compat_websockets)
-
-
 def merge_headers(*dicts):
     """Merge dicts of http headers case insensitively, prioritizing the latter ones"""
     return {k.title(): v for k, v in itertools.chain.from_iterable(map(dict.items, dicts))}
@@ -5312,3 +5300,8 @@ class classproperty:
 
 def Namespace(**kwargs):
     return collections.namedtuple('Namespace', kwargs)(**kwargs)
+
+
+# Deprecated
+has_certifi = bool(certifi)
+has_websockets = bool(websockets)