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+====== Python中遍历类的成员变量 ======
+在Python中经常会遇到新的类，有时候需要遍历一下类的成员变量和函数，用dir只能看到成员的名字，而且也不能区分成员是变量还是函数。
+====== Python类遍历实现代码 ======
+下面的Python代码就实现了遍历类成员，并将成员变量打印出来。
+<code python>
+    types = [type(i) for i in [0, "0", [0], {0:1}, (0,)]]
+    content = ""
+    for k in dir(self.request):
+      content += "%s: %s\n" % (k, type(eval("self.request.%s" % k)))
+      if type(eval("self.request.%s" % k)) in types:
+        content += "%s\n" % str(eval("self.request.%s" % k))
+      content += "\n"
+    print content
+</code>
+===== Google App Engine中request类的遍历 =====
+<code>
+GET: <type 'instance'>
+POST: <type 'instance'>
+ResponseClass: <type 'type'>
+__class__: <type 'type'>
+__delattr__: <type 'instancemethod'>
+__dict__: <type 'dict'>
+{'charset': 'utf-8', 'decode_param_names': True, '_environ': {'wsgi.version': (1, 0), 'webob._parsed_query_vars': (MultiDict([]), ''), 'SERVER_SOFTWARE': 'Development/1.0', 'SCRIPT_NAME': '', 'REQUEST_METHOD': 'GET', 'HTTP_KEEP_ALIVE': '115', 'SERVER_PROTOCOL': 'HTTP/1.0', 'QUERY_STRING': '', 'CONTENT_LENGTH': '', 'HTTP_ACCEPT_CHARSET': 'GB2312,utf-8;q=0.7,*;q=0.7', 'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0', 'HTTP_CONNECTION': 'keep-alive', 'SERVER_NAME': 'localhost', 'REMOTE_ADDR': '127.0.0.1', 'wsgi.url_scheme': 'http', 'SDK_VERSION': '1.4.2', 'PATH_TRANSLATED': 'C:\\Documents and Settings\\dongu\\My Documents\\projects\\website\\gae\\vanclquan\\index.py', 'SERVER_PORT': '8080', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'CURRENT_VERSION_ID': '2.1', 'USER_ORGANIZATION': '', 'wsgi.input': <cStringIO.StringI object at 0x045C31E8>, 'HTTP_HOST': 'localhost:8080', 'wsgi.multithread': False, 'APPLICATION_ID': 'vanclquan', 'HTTP_CACHE_CONTROL': 'max-age=0', 'USER_EMAIL': '', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'USER_ID': '', 'GATEWAY_INTERFACE': 'CGI/1.1', 'wsgi.run_once': True, 'wsgi.errors': <open file '<stderr>', mode 'w' at 0x00BAF0B0>, 'wsgi.multiprocess': False, 'HTTP_ACCEPT_LANGUAGE': 'zh-cn,zh;q=0.5', 'AUTH_DOMAIN': 'gmail.com', 'TZ': 'UTC', 'PATH_INFO': '/'}, 'unicode_errors': 'ignore'}
+__doc__: <type 'str'>
+Abstraction for an HTTP request.
+  Properties:
+    uri: the complete URI requested by the user
+    scheme: 'http' or 'https'
+    host: the host, including the port
+    path: the path up to the ';' or '?' in the URL
+    parameters: the part of the URL between the ';' and the '?', if any
+    query: the part of the URL after the '?'
+  You can access parsed query and POST values with the get() method; do not
+  parse the query string yourself.
+__getattr__: <type 'instancemethod'>
+__getattribute__: <type 'method-wrapper'>
+__hash__: <type 'method-wrapper'>
+__init__: <type 'instancemethod'>
+__module__: <type 'str'>
+google.appengine.ext.webapp
+__new__: <type 'builtin_function_or_method'>
+__reduce__: <type 'builtin_function_or_method'>
+__reduce_ex__: <type 'builtin_function_or_method'>
+__repr__: <type 'instancemethod'>
+__setattr__: <type 'instancemethod'>
+__str__: <type 'instancemethod'>
+__weakref__: <type 'NoneType'>
+_body__del: <type 'instancemethod'>
+_body__get: <type 'instancemethod'>
+_body__set: <type 'instancemethod'>
+_body_file__del: <type 'instancemethod'>
+_body_file__get: <type 'instancemethod'>
+_body_file__set: <type 'instancemethod'>
+_cache_control__del: <type 'instancemethod'>
+_cache_control__get: <type 'instancemethod'>
+_cache_control__set: <type 'instancemethod'>
+_environ: <type 'dict'>
+{'wsgi.version': (1, 0), 'webob._parsed_query_vars': (MultiDict([]), ''), 'SERVER_SOFTWARE': 'Development/1.0', 'SCRIPT_NAME': '', 'REQUEST_METHOD': 'GET', 'HTTP_KEEP_ALIVE': '115', 'SERVER_PROTOCOL': 'HTTP/1.0', 'QUERY_STRING': '', 'CONTENT_LENGTH': '', 'HTTP_ACCEPT_CHARSET': 'GB2312,utf-8;q=0.7,*;q=0.7', 'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0', 'HTTP_CONNECTION': 'keep-alive', 'SERVER_NAME': 'localhost', 'REMOTE_ADDR': '127.0.0.1', 'wsgi.url_scheme': 'http', 'SDK_VERSION': '1.4.2', 'PATH_TRANSLATED': 'C:\\Documents and Settings\\dongu\\My Documents\\projects\\website\\gae\\vanclquan\\index.py', 'SERVER_PORT': '8080', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'CURRENT_VERSION_ID': '2.1', 'USER_ORGANIZATION': '', 'wsgi.input': <cStringIO.StringI object at 0x045C31E8>, 'HTTP_HOST': 'localhost:8080', 'wsgi.multithread': False, 'APPLICATION_ID': 'vanclquan', 'HTTP_CACHE_CONTROL': 'max-age=0', 'USER_EMAIL': '', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'USER_ID': '', 'GATEWAY_INTERFACE': 'CGI/1.1', 'wsgi.run_once': True, 'wsgi.errors': <open file '<stderr>', mode 'w' at 0x00BAF0B0>, 'wsgi.multiprocess': False, 'HTTP_ACCEPT_LANGUAGE': 'zh-cn,zh;q=0.5', 'AUTH_DOMAIN': 'gmail.com', 'TZ': 'UTC', 'PATH_INFO': '/'}
+_environ_getter: <type 'instancemethod'>
+_headers: <type 'NoneType'>
+_headers__get: <type 'instancemethod'>
+_headers__set: <type 'instancemethod'>
+_host__del: <type 'instancemethod'>
+_host__get: <type 'instancemethod'>
+_host__set: <type 'instancemethod'>
+_urlargs__del: <type 'instancemethod'>
+_urlargs__get: <type 'instancemethod'>
+_urlargs__set: <type 'instancemethod'>
+_urlvars__del: <type 'instancemethod'>
+_urlvars__get: <type 'instancemethod'>
+_urlvars__set: <type 'instancemethod'>
+accept: <class 'webob.acceptparse.MIMEAccept'>
+accept_charset: <class 'webob.acceptparse.Accept'>
+accept_encoding: <class 'webob.acceptparse.NoAccept'>
+accept_language: <class 'webob.acceptparse.Accept'>
+application_url: <type 'str'>
+http://localhost:8080
+arguments: <type 'instancemethod'>
+blank: <type 'instancemethod'>
+body: <type 'str'>
+body_file: <type 'cStringIO.StringI'>
+cache_control: <class 'webob.cachecontrol.CacheControl'>
+call_application: <type 'instancemethod'>
+charset: <type 'str'>
+utf-8
+content_length: <type 'NoneType'>
+content_type: <type 'str'>
+application/x-www-form-urlencoded
+cookies: <type 'instance'>
+copy: <type 'instancemethod'>
+copy_get: <type 'instancemethod'>
+date: <type 'NoneType'>
+decode_param_names: <type 'bool'>
+environ: <type 'dict'>
+{'wsgi.version': (1, 0), 'webob._parsed_query_vars': (MultiDict([]), ''), 'SERVER_SOFTWARE': 'Development/1.0', 'SCRIPT_NAME': '', 'REQUEST_METHOD': 'GET', 'HTTP_KEEP_ALIVE': '115', 'SERVER_PROTOCOL': 'HTTP/1.0', 'QUERY_STRING': '', 'CONTENT_LENGTH': '', 'HTTP_ACCEPT_CHARSET': 'GB2312,utf-8;q=0.7,*;q=0.7', 'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0', 'HTTP_CONNECTION': 'keep-alive', 'SERVER_NAME': 'localhost', 'REMOTE_ADDR': '127.0.0.1', 'wsgi.url_scheme': 'http', 'SDK_VERSION': '1.4.2', 'PATH_TRANSLATED': 'C:\\Documents and Settings\\dongu\\My Documents\\projects\\website\\gae\\vanclquan\\index.py', 'SERVER_PORT': '8080', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'CURRENT_VERSION_ID': '2.1', 'USER_ORGANIZATION': '', 'wsgi.input': <cStringIO.StringI object at 0x045C31E8>, 'HTTP_HOST': 'localhost:8080', 'wsgi.multithread': False, 'APPLICATION_ID': 'vanclquan', 'HTTP_CACHE_CONTROL': 'max-age=0', 'USER_EMAIL': '', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'USER_ID': '', 'GATEWAY_INTERFACE': 'CGI/1.1', 'wsgi.run_once': True, 'wsgi.errors': <open file '<stderr>', mode 'w' at 0x00BAF0B0>, 'wsgi.multiprocess': False, 'HTTP_ACCEPT_LANGUAGE': 'zh-cn,zh;q=0.5', 'AUTH_DOMAIN': 'gmail.com', 'webob._cache_control': ('max-age=0', <CacheControl 'max-age=0'>), 'TZ': 'UTC', 'webob._parsed_cookies': ({}, ''), 'PATH_INFO': '/'}
+get: <type 'instancemethod'>
+get_all: <type 'instancemethod'>
+get_range: <type 'instancemethod'>
+get_response: <type 'instancemethod'>
+headers: <type 'instance'>
+host: <type 'str'>
+localhost:8080
+host_url: <type 'str'>
+http://localhost:8080
+if_match: <class 'webob.etag._AnyETag'>
+if_modified_since: <type 'NoneType'>
+if_none_match: <class 'webob.etag._NoETag'>
+if_range: <class 'webob.etag._NoIfRange'>
+if_unmodified_since: <type 'NoneType'>
+is_xhr: <type 'bool'>
+max_forwards: <type 'NoneType'>
+method: <type 'str'>
+GET
+params: <type 'instance'>
+path: <type 'str'>
+/
+path_info: <type 'str'>
+/
+path_info_peek: <type 'instancemethod'>
+path_info_pop: <type 'instancemethod'>
+path_qs: <type 'str'>
+/
+path_url: <type 'str'>
+http://localhost:8080/
+postvars: <type 'instance'>
+pragma: <type 'str'>
+query: <type 'str'>
+query_string: <type 'str'>
+queryvars: <type 'instance'>
+range: <type 'NoneType'>
+referer: <type 'str'>
+referrer: <type 'str'>
+relative_url: <type 'instancemethod'>
+remote_addr: <type 'str'>
+.0.0.1
+remote_user: <type 'NoneType'>
+remove_conditional_headers: <type 'instancemethod'>
+request_body_tempfile_limit: <type 'int'>
+scheme: <type 'str'>
+http
+script_name: <type 'str'>
+server_name: <type 'str'>
+localhost
+server_port: <type 'int'>
+str_GET: <type 'instance'>
+str_POST: <class 'webob.multidict.NoVars'>
+str_cookies: <type 'dict'>
+{}
+str_params: <type 'instance'>
+str_postvars: <class 'webob.multidict.NoVars'>
+str_queryvars: <type 'instance'>
+unicode_errors: <type 'str'>
+ignore
+uri: <type 'str'>
+http://localhost:8080/
+url: <type 'str'>
+http://localhost:8080/
+urlargs: <type 'tuple'>
+()
+urlvars: <type 'dict'>
+{}
+user_agent: <type 'str'>
+Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0
+</code>

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