diff --git a/solution/0300-0399/0319.Bulb Switcher/README.md b/solution/0300-0399/0319.Bulb Switcher/README.md
index 0033359fc94ec..69c05d326e9f9 100644
--- a/solution/0300-0399/0319.Bulb Switcher/README.md	
+++ b/solution/0300-0399/0319.Bulb Switcher/README.md	
@@ -63,6 +63,9 @@
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+class Solution:
+    def bulbSwitch(self, n: int) -> int:
+        return int(n ** (1 / 2))
 
 ```
 
diff --git a/solution/0300-0399/0319.Bulb Switcher/README_EN.md b/solution/0300-0399/0319.Bulb Switcher/README_EN.md
index 0e75923efc308..d0ae74a07b766 100644
--- a/solution/0300-0399/0319.Bulb Switcher/README_EN.md	
+++ b/solution/0300-0399/0319.Bulb Switcher/README_EN.md	
@@ -50,6 +50,9 @@ So you should return 1 because there is only one bulb is on.</pre>
 ### **Python3**
 
 ```python
+class Solution:
+    def bulbSwitch(self, n: int) -> int:
+        return int(n ** (1 / 2))
 
 ```
 
diff --git a/solution/0300-0399/0319.Bulb Switcher/Solution.py b/solution/0300-0399/0319.Bulb Switcher/Solution.py
new file mode 100644
index 0000000000000..2bbf692999530
--- /dev/null
+++ b/solution/0300-0399/0319.Bulb Switcher/Solution.py	
@@ -0,0 +1,3 @@
+class Solution:
+    def bulbSwitch(self, n: int) -> int:
+        return int(n ** (1 / 2))