From f10b5cefd97ccc03bb78bc40b39fb41428b46ef9 Mon Sep 17 00:00:00 2001
From: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>
Date: Fri, 6 Jan 2023 15:40:35 +0800
Subject: [PATCH] [Docs] Clear the documentations about Python3.6 (#865)

---
 docs/en/get_started/installation.md    |  2 +-
 docs/zh_cn/get_started/installation.md |  2 +-
 mmengine/logging/logger.py             | 13 +++++--------
 3 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/docs/en/get_started/installation.md b/docs/en/get_started/installation.md
index cb9fbf08..45a7affa 100644
--- a/docs/en/get_started/installation.md
+++ b/docs/en/get_started/installation.md
@@ -2,7 +2,7 @@
 
 ## Prerequisites
 
-- Python 3.6+
+- Python 3.7+
 - PyTorch 1.6+
 - CUDA 9.2+
 - GCC 5.4+
diff --git a/docs/zh_cn/get_started/installation.md b/docs/zh_cn/get_started/installation.md
index b50deb2f..3fbc55f3 100644
--- a/docs/zh_cn/get_started/installation.md
+++ b/docs/zh_cn/get_started/installation.md
@@ -2,7 +2,7 @@
 
 ### 环境依赖
 
-- Python 3.6+
+- Python 3.7+
 - PyTorch 1.6+
 - CUDA 9.2+
 - GCC 5.4+
diff --git a/mmengine/logging/logger.py b/mmengine/logging/logger.py
index 2be03ab2..442bef2f 100644
--- a/mmengine/logging/logger.py
+++ b/mmengine/logging/logger.py
@@ -235,15 +235,12 @@ class MMLogger(Logger, ManagerMixin):
 
         level must be an int or a str.
         """
-        # Compatible with python3.6. `logging.Logger` does not have
-        # `_cache` attribute in python3.6.
         self.level = logging._checkLevel(level)
-        if hasattr(self, '_cache'):
-            _accquire_lock()
-            # The same logic as `logging.Manager._clear_cache`.
-            for logger in MMLogger._instance_dict.values():
-                logger._cache.clear()
-            _release_lock()
+        _accquire_lock()
+        # The same logic as `logging.Manager._clear_cache`.
+        for logger in MMLogger._instance_dict.values():
+            logger._cache.clear()
+        _release_lock()
 
 
 def print_log(msg,