How do I solve NoneType object is not callable with BeautifulSoup and Bottle?

I have this code inside one of my routes in a small Bottle project:

@route('/method/') def method(): import urllib.request from bottle import response response.content_type = 'text/xml' opener = urllib.request.build_opener() opener.addheaders = [('User-agent', 'Mozilla/5.0')] r=opener.open('http://www.example.com/') content = str(r.read()) soup = BeautifulSoup(content) return soup.title 

I have read similar questions. I've tried everything, but I'm always getting the same error. I don't even know if it's related with bottle.

I have used virtualenv to create an isolated environment with Python3. The version of BeautifulSoup is 4:

from bs4 import BeautifulSoup 

I'm always getting the same, giant stacktraces of:

 127.0.0.1 - - [24/Jan/2015 14:50:42] "GET /extract_web_information/ HTTP/1.1" 200 0 Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 179, in finish_response for data in self.result: File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/util.py", line 30, in __next__ data = self.filelike.read(self.blksize) TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 138, in run self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 183, in finish_response self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 38, in close SimpleHandler.close(self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 321, in close self.result.close() TypeError: 'NoneType' object is not callable 127.0.0.1 - - [24/Jan/2015 14:50:42] "GET /extract_web_information/ HTTP/1.1" 500 59 ---------------------------------------- Exception happened during processing of request from ('127.0.0.1', 55533) Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 179, in finish_response for data in self.result: File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/util.py", line 30, in __next__ data = self.filelike.read(self.blksize) TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 138, in run self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 183, in finish_response self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 38, in close SimpleHandler.close(self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 321, in close self.result.close() TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 141, in run self.handle_error() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 368, in handle_error self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 180, in finish_response self.write(data) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 274, in write self.send_headers() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 331, in send_headers if not self.origin_server or self.client_is_modern(): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 344, 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 "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 305, in _handle_request_noblock self.process_request(request, client_address) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 331, in process_request self.finish_request(request, client_address) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 344, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 669, in __init__ self.handle() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 133, in handle handler.run(self.server.get_app()) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 144, in run self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 35, in close self.status.split(' ',1)[0], self.bytes_sent AttributeError: 'NoneType' object has no attribute 'split' ---------------------------------------- 127.0.0.1 - - [24/Jan/2015 14:50:42] "GET /extract_web_information/ HTTP/1.1" 200 0 Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 179, in finish_response for data in self.result: File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/util.py", line 30, in __next__ data = self.filelike.read(self.blksize) TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 138, in run self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 183, in finish_response self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 38, in close SimpleHandler.close(self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 321, in close self.result.close() TypeError: 'NoneType' object is not callable 127.0.0.1 - - [24/Jan/2015 14:50:42] "GET /extract_web_information/ HTTP/1.1" 500 59 ---------------------------------------- Exception happened during processing of request from ('127.0.0.1', 55536) Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 179, in finish_response for data in self.result: File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/util.py", line 30, in __next__ data = self.filelike.read(self.blksize) TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 138, in run self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 183, in finish_response self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 38, in close SimpleHandler.close(self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 321, in close self.result.close() TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 141, in run self.handle_error() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 368, in handle_error self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 180, in finish_response self.write(data) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 274, in write self.send_headers() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 331, in send_headers if not self.origin_server or self.client_is_modern(): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 344, 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 "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 305, in _handle_request_noblock self.process_request(request, client_address) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 331, in process_request self.finish_request(request, client_address) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 344, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 669, in __init__ self.handle() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 133, in handle handler.run(self.server.get_app()) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 144, in run self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 35, in close self.status.split(' ',1)[0], self.bytes_sent AttributeError: 'NoneType' object has no attribute 'split' ---------------------------------------- 127.0.0.1 - - [24/Jan/2015 14:50:42] "GET /extract_web_information/ HTTP/1.1" 200 0 Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 179, in finish_response for data in self.result: File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/util.py", line 30, in __next__ data = self.filelike.read(self.blksize) TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 138, in run self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 183, in finish_response self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 38, in close SimpleHandler.close(self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 321, in close self.result.close() TypeError: 'NoneType' object is not callable 127.0.0.1 - - [24/Jan/2015 14:50:42] "GET /extract_web_information/ HTTP/1.1" 500 59 ---------------------------------------- Exception happened during processing of request from ('127.0.0.1', 55539) Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 179, in finish_response for data in self.result: File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/util.py", line 30, in __next__ data = self.filelike.read(self.blksize) TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 138, in run self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 183, in finish_response self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 38, in close SimpleHandler.close(self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 321, in close self.result.close() TypeError: 'NoneType' object is not callable During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 141, in run self.handle_error() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 368, in handle_error self.finish_response() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 180, in finish_response self.write(data) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 274, in write self.send_headers() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 331, in send_headers if not self.origin_server or self.client_is_modern(): File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 344, 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 "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 305, in _handle_request_noblock self.process_request(request, client_address) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 331, in process_request self.finish_request(request, client_address) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 344, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/socketserver.py", line 669, in __init__ self.handle() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 133, in handle handler.run(self.server.get_app()) File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/handlers.py", line 144, in run self.close() File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/wsgiref/simple_server.py", line 35, in close self.status.split(' ',1)[0], self.bytes_sent AttributeError: 'NoneType' object has no attribute 'split' ---------------------------------------- 

How I'm running the server

 source bin/activate python myserver.py After that, GET request from a browser 

I have tested that the request is correctly made.

Thanks a lot,