Remove Python 3.7 support (#8361)

Closes #7803
Authored by: bashonly

yt_dlp/__init__.py

@@ -1,8 +1,8 @@
-try:
-    import contextvars  # noqa: F401
-except Exception:
-    raise Exception(
-        f'You are using an unsupported version of Python. Only Python versions 3.7 and above are supported by yt-dlp')  # noqa: F541
+import sys
+
+if sys.version_info < (3, 8):
+    raise ImportError(
+        f'You are using an unsupported version of Python. Only Python versions 3.8 and above are supported by yt-dlp')  # noqa: F541
 
 __license__ = 'Public Domain'
 
@@ -12,7 +12,6 @@ import itertools
 import optparse
 import os
 import re
-import sys
 import traceback
 
 from .compat import compat_shlex_quote

yt_dlp/compat/functools.py

@@ -10,17 +10,3 @@ try:
     cache  # >= 3.9
 except NameError:
     cache = lru_cache(maxsize=None)
-
-try:
-    cached_property  # >= 3.8
-except NameError:
-    class cached_property:
-        def __init__(self, func):
-            update_wrapper(self, func)
-            self.func = func
-
-        def __get__(self, instance, _):
-            if instance is None:
-                return self
-            setattr(instance, self.func.__name__, self.func(instance))
-            return getattr(instance, self.func.__name__)

yt_dlp/update.py

@@ -131,7 +131,7 @@ def _get_binary_name():
 
 
 def _get_system_deprecation():
-    MIN_SUPPORTED, MIN_RECOMMENDED = (3, 7), (3, 8)
+    MIN_SUPPORTED, MIN_RECOMMENDED = (3, 8), (3, 8)
 
     if sys.version_info > MIN_RECOMMENDED:
         return None
@@ -140,16 +140,8 @@ def _get_system_deprecation():
     if sys.version_info < MIN_SUPPORTED:
         msg = f'Python version {major}.{minor} is no longer supported'
     else:
-        msg = f'Support for Python version {major}.{minor} has been deprecated. '
-        # Temporary until `win_x86_exe` uses 3.8, which will deprecate Vista and Server 2008
-        if detect_variant() == 'win_x86_exe':
-            platform_name = platform.platform()
-            if any(platform_name.startswith(f'Windows-{name}') for name in ('Vista', '2008Server')):
-                msg = 'Support for Windows Vista/Server 2008 has been deprecated. '
-            else:
-                return None
-        msg += ('See  https://github.com/yt-dlp/yt-dlp/issues/7803  for details.'
-                '\nYou may stop receiving updates on this version at any time')
+        msg = (f'Support for Python version {major}.{minor} has been deprecated. '
+               '\nYou may stop receiving updates on this version at any time')
 
     major, minor = MIN_RECOMMENDED
     return f'{msg}! Please update to Python {major}.{minor} or above'