access function in python module outside of class

Question 1

I have the next situation. I try to overwrite method send_error in BaseHTTPRequestHandler in BaseHTTPServer.py file. BaseHTTPServer.py has such structure concerning send_error method:

def _quote_html(html):
 blah
 blah
class HTTPServer():
 blah
 blah
class BaseHTTPRequestHandler():
 blah
 blah
 def send_error(self):
 blah
 blah
 content = (self.error_message_format %
 {'code': code, 'message': _quote_html(message), 'explain': explain})

Here inside send_error method _quote_html function is called. It works inside BaseHTTPServer.py file but if create my own httphandler, inherit from BaseHTTPRequestHandler and try to overwrite send_error, my function send_error can not access _quote_html function located in BaseHTTPServer.py file outside of BaseHTTPRequestHandler class:

Traceback (most recent call last):
 File "/usr/lib/python2.7/SocketServer.py", line 593, in process_request_thread
 self.finish_request(request, client_address)
 File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
 self.RequestHandlerClass(request, client_address, self)
 File "/python_codes/Junior/Level1/C&C/HttpServer/HttpHandler.py", line 12, in __init__
 BaseHTTPRequestHandler.__init__(self, *args, **kwargs)
 File "/usr/lib/python2.7/SocketServer.py", line 649, in __init__
 self.handle()
 File "/usr/lib/python2.7/BaseHTTPServer.py", line 340, in handle
 self.handle_one_request()
 File "/python_codes/Junior/Level1/C&C/HttpServer/HttpHandler.py", line 26, in handle_one_request
 if not self.parse_request():
 File "/usr/lib/python2.7/BaseHTTPServer.py", line 286, in parse_request
 self.send_error(400, "Bad request syntax (%r)" % requestline)
 File "/python_codes/Junior/Level1/C&C/HttpServer/HttpHandler.py", line 106, in send_error
 {'code': code, 'message': _quote_html(message), 'explain': explain})
NameError: global name '_quote_html' is not defined

So my question is how can I access function outside parent class in module file? In my case from send_error() to _quote_html(). Everythong is imported from BaseHTTPServer.py:

from BaseHTTPServer import *

Question 2

How are you inheriting from BaseHttpRequestHandler... ?

Question 3

As usually: class myhandler(BaseHttpRequestHandler):

Question 4

Rename your function into quote_html. Or do explicit import like this:

from BaseHTTPServer import _quote_html

Since:

from M import * does not import objects whose name starts with an underscore.

Question 5

I second the explicit import suggestion. from <module> import * is generally frowned upon since it pollutes the local namespace and makes it hard to track an item's origin.

Question 6

@ВладХристенко Though... its fine even to accept... but please do both - "upvote and accept" the right answer.

Question 7

I currently do not have enough reputation to upvote((( I would do it.

Question 8

I have tried this and it works fine:

def b():
 return 45
class Person(object):
 def getYears(self):
 return self.b()
print Person().getYears()

So, the only difference I see is the 'objects' between brackets.

Dmitry Nedbaylo 2,3421 gold badge21 silver badges20 bronze badges · Accepted Answer · 2015-01-30 12:23:22Z

1

Rename your function into quote_html. Or do explicit import like this:

from BaseHTTPServer import _quote_html

Since:

from M import * does not import objects whose name starts with an underscore.

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edited Jan 30, 2015 at 12:30

answered Jan 30, 2015 at 12:23

Dmitry Nedbaylo's user avatar

Dmitry Nedbaylo

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3 Comments

ivan_pozdeev

ivan_pozdeev Over a year ago

I second the explicit import suggestion. from <module> import * is generally frowned upon since it pollutes the local namespace and makes it hard to track an item's origin.

2015年01月30日T12:32:43.48Z+00:00

sarveshseri

sarveshseri Over a year ago

@ВладХристенко Though... its fine even to accept... but please do both - "upvote and accept" the right answer.

2015年01月30日T12:42:51.21Z+00:00

Влад Христенко

Влад Христенко Over a year ago

I currently do not have enough reputation to upvote((( I would do it.

2015年01月30日T12:46:39.927Z+00:00

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