[py] use context manager for encoding

titusfortner · titusfortner · commit e66ddf2d8288 · 2021-12-24T16:06:51.000-06:00
diff --git a/py/selenium/webdriver/firefox/webdriver.py b/py/selenium/webdriver/firefox/webdriver.py
@@ -246,9 +246,8 @@ def install_addon(self, path, temporary=None) -> str:
 
                 driver.install_addon('/path/to/firebug.xpi')
         """
-        file_ = open(path, 'rb')
-        addon = (base64.b64encode(file_.read()).decode('UTF-8'))
-        file_.close()
+        with open(path, 'rb') as file:
+            addon = (base64.b64encode(file.read()).decode('UTF-8'))
 
         payload = {"addon": addon}
         if temporary:
