Remove deprecated dependency (#2386)

No need for an external library just for 5 annotations.

CHANGES

@@ -14,6 +14,10 @@
     * Added dynaminc_startup_nodes configuration to RedisCluster
     * Fix reusing the old nodes' connections when cluster topology refresh is being done
     * Fix RedisCluster to immediately raise AuthenticationError without a retry
+    * ClusterPipeline Doesn't Handle ConnectionError for Dead Hosts (#2225)
+    * Remove compatibility code for old versions of Hiredis, drop Packaging dependency
+    * The `deprecated` library is no longer a dependency
+
 * 4.1.3 (Feb 8, 2022)
     * Fix flushdb and flushall (#1926)
     * Add redis5 and redis4 dockers (#1871)

redis/utils.py

@@ -1,4 +1,5 @@
 from contextlib import contextmanager
+from functools import wraps
 from typing import Any, Dict, Mapping, Union
 
 try:
@@ -79,3 +80,30 @@ def merge_result(command, res):
             result.add(value)
 
     return list(result)
+
+
+def warn_deprecated(name, reason="", version="", stacklevel=2):
+    import warnings
+
+    msg = f"Call to deprecated {name}."
+    if reason:
+        msg += f" ({reason})"
+    if version:
+        msg += f" -- Deprecated since version {version}."
+    warnings.warn(msg, category=DeprecationWarning, stacklevel=stacklevel)
+
+
+def deprecated_function(reason="", version="", name=None):
+    """
+    Decorator to mark a function as deprecated.
+    """
+
+    def decorator(func):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            warn_deprecated(name or func.__name__, reason, version, stacklevel=3)
+            return func(*args, **kwargs)
+
+        return wrapper
+
+    return decorator

requirements.txt

@@ -1,4 +1,3 @@
 async-timeout>=4.0.2
-deprecated>=1.2.3
 packaging>=20.4
 typing-extensions; python_version<"3.8"

setup.py

@@ -32,7 +32,6 @@
     author_email="oss@redis.com",
     python_requires=">=3.6",
     install_requires=[
-        "deprecated>=1.2.3",
         "packaging>=20.4",
         'importlib-metadata >= 1.0; python_version < "3.8"',
         'typing-extensions; python_version<"3.8"',