diff --git a/DrissionPage/__init__.py b/DrissionPage/__init__.py
index 82e1b7d..335c6a4 100644
--- a/DrissionPage/__init__.py
+++ b/DrissionPage/__init__.py
@@ -12,10 +12,6 @@ from .web_page import WebPage
 from .configs.chromium_options import ChromiumOptions
 from .configs.session_options import SessionOptions
 
-# 常用工具
-from .action_chains import ActionChains
-from .commons.keys import Keys
-
 # 旧版页面类和启动配置类
 try:
     from .mixpage.mix_page import MixPage
diff --git a/DrissionPage/tools.py b/DrissionPage/common.py
similarity index 64%
rename from DrissionPage/tools.py
rename to DrissionPage/common.py
index a77e11f..9e2ba98 100644
--- a/DrissionPage/tools.py
+++ b/DrissionPage/common.py
@@ -7,4 +7,7 @@
 from FlowViewer import Listener, RequestMan
 
 from .session_element import make_session_ele
-from .easy_set import get_match_driver
+
+from .action_chains import ActionChains
+from .commons.keys import Keys
+from .commons.by import By
diff --git a/DrissionPage/commons/by.py b/DrissionPage/commons/by.py
new file mode 100644
index 0000000..899a183
--- /dev/null
+++ b/DrissionPage/commons/by.py
@@ -0,0 +1,10 @@
+# -*- coding:utf-8 -*-
+class By:
+    ID = 'id'
+    XPATH = 'xpath'
+    LINK_TEXT = 'link text'
+    PARTIAL_LINK_TEXT = 'partial link text'
+    NAME = 'name'
+    TAG_NAME = 'tag name'
+    CLASS_NAME = 'class name'
+    CSS_SELECTOR = 'css selector'
diff --git a/DrissionPage/commons/locator.py b/DrissionPage/commons/locator.py
index bc8a936..1ffeb2a 100644
--- a/DrissionPage/commons/locator.py
+++ b/DrissionPage/commons/locator.py
@@ -4,6 +4,7 @@
 @Contact :   g1879@qq.com
 """
 from re import split
+from .by import By
 
 
 def get_loc(loc, translate_css=False):
@@ -219,32 +220,32 @@ def translate_loc(loc):
     if len(loc) != 2:
         raise ValueError('定位符长度必须为2。')
 
-    loc_by = 'xpath'
+    loc_by = By.XPATH
     loc_0 = loc[0].lower()
 
-    if loc_0 == 'xpath':
+    if loc_0 == By.XPATH:
         loc_str = loc[1]
 
-    elif loc_0 == 'css selector':
+    elif loc_0 == By.CSS_SELECTOR:
         loc_by = loc_0
         loc_str = loc[1]
 
-    elif loc_0 == 'id':
+    elif loc_0 == By.ID:
         loc_str = f'//*[@id="{loc[1]}"]'
 
-    elif loc_0 == 'class name':
+    elif loc_0 == By.CLASS_NAME:
         loc_str = f'//*[@class="{loc[1]}"]'
 
-    elif loc_0 == 'link text':
+    elif loc_0 == By.PARTIAL_LINK_TEXT:
         loc_str = f'//a[text()="{loc[1]}"]'
 
-    elif loc_0 == 'name':
+    elif loc_0 == By.NAME:
         loc_str = f'//*[@name="{loc[1]}"]'
 
-    elif loc_0 == 'tag name':
-        loc_str = f'//{loc[1]}'
+    elif loc_0 == By.TAG_NAME:
+        loc_str = f'//*[name()="{loc[1]}"]'
 
-    elif loc_0 == 'partial link text':
+    elif loc_0 == By.PARTIAL_LINK_TEXT:
         loc_str = f'//a[contains(text(),"{loc[1]}")]'
 
     else: