解决python3中自定义wsgi函数,make_server函数报错的问题 #coding:utf-8 from wsgiref.simple_server import make_server def RunServer(environ, start_response): start_response('200 OK', [('Content-Type', 'text/html')]) return '

Hello, web!

' if __name__ == '__main__': httpd = make_server('localhost', 8000, RunServer) print ("Serving HTTP on port 8000...") httpd.serve_forever() 这段代码在python2.7中可以运行，到python3.4中运行，就开始报错，报错内容如下： Serving HTTP on port 8000... 127.0.0.1 - - [12/Apr/2016 16:44:17] "GET / HTTP/1.1" 200 0 Traceback (most recent call last): File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run self.finish_response() File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write "write() argument must be a bytes instance" AssertionError: write() argument must be a bytes instance 127.0.0.1 - - [12/Apr/2016 16:44:17] "GET / HTTP/1.1" 500 59 Traceback (most recent call last): File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run self.finish_response() File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write "write() argument must be a bytes instance" AssertionError: write() argument must be a bytes instance During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Python34\lib\wsgiref\handlers.py", line 141, in run self.handle_error() File "C:\Python34\lib\wsgiref\handlers.py", line 369, in handle_error self.finish_response() File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) File "C:\Python34\lib\wsgiref\handlers.py", line 275, in write self.send_headers() File "C:\Python34\lib\wsgiref\handlers.py", line 332, in send_headers if not self.origin_server or self.client_is_modern(): File "C:\Python34\lib\wsgiref\handlers.py", line 345, in client_is_modern return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9' TypeError: 'NoneType' object is not subscriptable During handling of the above exception, another exception occurred: Traceback (most recent call last): ---------------------------------------- Exception happened during processing of request from ('127.0.0.1', 60566) File "C:\Python34\lib\socketserver.py", line 305, in _handle_request_noblock self.process_request(request, client_address) File "C:\Python34\lib\socketserver.py", line 331, in process_request self.finish_request(request, client_address) File "C:\Python34\lib\socketserver.py", line 344, in finish_request self.RequestHandlerClass(request, client_address, self) File "C:\Python34\lib\socketserver.py", line 673, in __init__ self.handle() File "C:\Python34\lib\wsgiref\simple_server.py", line 133, in handle handler.run(self.server.get_app()) File "C:\Python34\lib\wsgiref\handlers.py", line 144, in run self.close() File "C:\Python34\lib\wsgiref\simple_server.py", line 35, in close self.status.split(' ',1)[0], self.bytes_sent AttributeError: 'NoneType' object has no attribute 'split' ---------------------------------------- ---------------------------------------- Exception happened during processing of request from ('127.0.0.1', 60568) ---------------------------------------- 127.0.0.1 - - [12/Apr/2016 16:44:18] "GET / HTTP/1.1" 200 0 Traceback (most recent call last): File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run self.finish_response() File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write "write() argument must be a bytes instance" AssertionError: write() argument must be a bytes instance 127.0.0.1 - - [12/Apr/2016 16:44:18] "GET / HTTP/1.1" 500 59 Traceback (most recent call last): File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run self.finish_response() File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write "write() argument must be a bytes instance" AssertionError: write() argument must be a bytes instance During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Python34\lib\wsgiref\handlers.py", line 141, in run self.handle_error() File "C:\Python34\lib\wsgiref\handlers.py", line 369, in handle_error self.finish_response() File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) File "C:\Python34\lib\wsgiref\handlers.py", line 275, in write self.send_headers() File "C:\Python34\lib\wsgiref\handlers.py", line 332, in send_headers if not self.origin_server or self.client_is_modern(): File "C:\Python34\lib\wsgiref\handlers.py", line 345, in client_is_modern return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9' TypeError: 'NoneType' object is not subscriptable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Python34\lib\socketserver.py", line 305, in _handle_request_noblock self.process_request(request, client_address) File "C:\Python34\lib\socketserver.py", line 331, in process_request self.finish_request(request, client_address) File "C:\Python34\lib\socketserver.py", line 344, in finish_request self.RequestHandlerClass(request, client_address, self) File "C:\Python34\lib\socketserver.py", line 673, in __init__ self.handle() File "C:\Python34\lib\wsgiref\simple_server.py", line 133, in handle handler.run(self.server.get_app()) File "C:\Python34\lib\wsgiref\handlers.py", line 144, in run self.close() File "C:\Python34\lib\wsgiref\simple_server.py", line 35, in close self.status.split(' ',1)[0], self.bytes_sent AttributeError: 'NoneType' object has no attribute 'split' 猛地一看，这么多报错，一下就蒙圈了，各种google百度，各种查，google到时能查到一些，但是英文不好，也看不太明白，百度查到的都是垃圾，根本就没用，最后硬着头皮，一点一点看源码。首先，根据第一行的提示： File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run self.finish_response() 我这里用的编辑器是pycharm，找到handlers.py文件的138行，按住ctrl点击文件中的finish_response()方法，就找到self.finish_response()定义的位置了。根据第二条提示： File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data) 发现是write方法出现错误，再按住ctrl点击write方法，找到定义write方法的位置，发现第一行就定义了一条报错： assert type(data) is bytes, \ "write() argument must be a bytes instance" 对照上面的报错信息，发现可能是变量data的类型，不是bytes，所以在handlers.py181行代码self.write(data)上面加一句： data=data.encode(),再次刷新程序，发现所有报错居然都没了，程序正常运行。以上这篇解决python3中自定义wsgi函数,make_server函数报错的问题就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持中文源码网。