删除没有用到的lxml

Author: gusibi

README.md

@@ -31,7 +31,6 @@ Requires
 * requests
 * simplejson
 * six
-* lxml
 * xmltodict
 * pycrypto
 ```

requirements.txt

@@ -2,6 +2,5 @@ simplejson
 requests
 chardet
 six
-lxml
 xmltodict
 pycrypto

setup.py

@@ -10,7 +10,7 @@
     requirements = [l for l in f.read().splitlines() if l]
 
 setup(name="python-weixin",
-      version="0.4.3",
+      version="0.4.4",
       description="Python Weixin API client support wechat-app",
       long_description=long_description,
       long_description_content_type="text/markdown",

weixin/helper.py

@@ -358,14 +358,3 @@ def error_parser(error_html, encoding='gbk'):
     error_parser.feed(html)
     if error_parser.data:
         return error_dict.get(error_parser.data[0], None)
-
-
-def validate_xml(xml):
-    """
-    使用lxml.etree.parse 检测xml是否符合语法规范
-    """
-    from lxml import etree
-    try:
-        return etree.parse(xml)
-    except etree.XMLSyntaxError:
-        return False

weixin/oauth2.py

@@ -101,6 +101,8 @@ def exchange_refresh_token_for_access_token(self, refresh_token):
         return req.exchange_for_access_token(refresh_token=refresh_token)
 
     def exchange_code_for_session_key(self, code):
+        if not code:
+            raise OAuth2AuthExchangeError("Invalid code")
         req = OAuth2AuthExchangeRequest(self)
         return req.exchange_for_session_key(js_code=code)