🌐 Mailman 3 September 2010 - Python-list - python.org

Re: urllib with x509 certs
by Lacrima May 16, 2014

May 16, 2014

On Jul 4, 11:24 am, Chris Rebert <c...(a)rebertia.com> wrote: > On Sat, Jul 4, 2009 at 1:12 AM, Lacrima<Lacrima.Ma...(a)gmail.com> wrote: > > Hello! > > > I am trying to use urllib to fetch some internet resources, using my > > client x509 certificate. > > I have divided my .p12 file into mykey.key and mycert.cer files. > > Then I use following approach: > >>>> import urllib > >>>> url = 'https://example.com' > >>>> xml = '''<request> > > ... <somexml>somexml</somexml> > > </request>''' > >>>> opener = urllib.URLopener(key_file = 'mykey.key', cert_file = 'mycert.cer') > >>>> f = opener.open(url, xml) > > > This works Ok! But every time I am asked to enter PEM pass phrase, > > which I specified during dividing my .p12 file. > > So my question... What should I do to make my code fetch any url > > automatically (without asking me every time to enter pass phrase)? > > As I understand there is impossible to specify pass phrase while > > constructing URLopener. > > So what should I do? > > Subclass FancyURLopener > [http://docs.python.org/library/urllib.html#urllib.FancyURLopener], > overriding the prompt_user_passwd() method > [http://docs.python.org/library/urllib.html#urllib.FancyURLopener.prom...]. > Then use an instance of your subclass instead of URLopener. > > Cheers, > Chris > --http://blog.rebertia.com Hi Chris, Thanks for your quick reply. According to docs the return value of prompt_user_passwd() method should be a tuple (user, password), but there is no user when authenticating with certificate. So how should I use this method? This doesn't work: >>> import urllib >>> class MyOpener(urllib.FancyURLopener): ... def prompt_user_passwd(self, host, realm): ... return ('password') ... With regards, Max

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Python in Process Control?
by Wolfgang Keller March 24, 2014

March 24, 2014

Hello, is it that my know-how to use Google is insufficient or... ...does really noone use Python for industrial control applications? At least I didn't manage to find any publicly available modules for such things as OPC/fieldbus communication etc... TIA, best regards, Wolfgang Keller

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OPC for Python ?? (Win32)
by Armin Steinhoff March 24, 2014

March 24, 2014

Hi All, is there an implementation of OPC for Win32 Python available ?? ( http://www.opcfoundation.org ) Regards Armin

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Python OPC -wrapper for data collection, anyone seen it ?
by pekka niiranen March 24, 2014

March 24, 2014

Has anybody seen OPC -wrapper done in python ? In industry OPC -servers are breaking thru. It is a microsoft based technoloqy to gather process information. Many Control System manufacturers have their own OPC -servers. There exists a visual basic wrapper -library so that one write VB - programs to enquire data from OPC -server.Wrapper done to python would be cool. Mark Hammond was not interested, but I am not giving up yet... -pekka-

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Writing an OPC client with Python ?
by pierlau March 24, 2014

March 24, 2014

Hello, I use an OPC server for connection to DC Drive. I would like to write a small OPC client. I have the dll OPCDAAuto.dll which contains all class and method but I wonder if its possible to instance in python the class that are in the dll ? Thanks for your help . Pierre

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newbie - Does IDLE care about sitecustomize.py?
by bobueland＠yahoo.com March 22, 2014

March 22, 2014

I have the following test script in the file customize.py # C:\Python24\Lib\site-packages\sitecustomize.py print "test text from sitecustomize" If start Python from command prompt I get C:\Python24>python test in sitecustomize Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. which shows that sitecustomize.py works Now if I start IDLE I only get IDLE 1.1.1 >>> which shows that that IDLE doesn't care about sitecustomize.py Am I missing something or how do you customize if you are using IDLE?

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PIL Image.fromarray( ... , mode="1" )
by Hans Georg Schaathun Feb. 12, 2014

Feb. 12, 2014

Does anyone know how to save two-tone images represented as numpy arrays? I handle grayscale images by converting to PIL Image objects (mode="L") and then use the PIL save method, but I cannot make this work with mode="1". I have tried both boolean arrays and uint8 arrays (mod 2). In both cases I get an image which is predominantly black, with thin white stripes (possibly for every 8 pixels). If, instead, multiply my (mod 2) image by 255, and then convert with mode="L", I get the expected random-noise-looking image. Does anyone have any ideas? What do I do wrong? What is the right/best way to save/convert two-tone images? I have not managed to find proper documentation for the Image.fromarray() method; the docstring seems to be empty )-: TIA :-- Hans Georg

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Editor for Python
by MANUEL FERNANDEZ PEREZ Jan. 9, 2014

Jan. 9, 2014

Hello, I'm looking for an editor for Python.I' m interested it works on Windows.Can anybody help me? Thank you Manuel

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converting a string to a function parameter
by koranthala Jan. 5, 2014

Jan. 5, 2014

Hi, Is it possible to convert a string to a function parameter? Ex: str = 'True, type=rect, sizes=[3, 4]' and I should be able to use it as: test(convert(str)) and the behaviour should be same as calling test with those values : i.e. test(True, type=rect, sizes=[3, 4]) I tried eval, but it did not work. And any other mechanism I think turns out to be creating a full fledged python parser. Is there any mechanism with which we can do this straight away?

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Problem when applying Patch from issue1424152 to get https over authenticating proxies working with urllib2 in Python 2.5
by tvashtar Dec. 10, 2013

Dec. 10, 2013

Hi, I'm trying to get https requests working through an authenticating proxy with urllib2 in Python 2.5, I'm aware that this isn't supported "out of the box", so applied the patch http://bugs.python.org/file9753/http-tunnel-urllib linked from http://bugs.python.org/issue1424152 , my baseline test program is the following: p = "user:pass@proxy:port" proxy_handler = urllib2.ProxyHandler({"http": p, "https": p}) urllib2.install_opener( urllib2.build_opener( urllib2.HTTPHandler, urllib2.HTTPSHandler, proxy_handler)) request = urllib2.Request( "https://groups.google.com") response = urllib2.urlopen(request) Unfortunately this doesn't work, the call stack being: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "D:\p4\depot\Development\HEAD\Build\ReleaseSystem\DownloadSystem \urllib2.py", line 121, in urlopen return _opener.open(url, data) File "D:\p4\depot\Development\HEAD\Build\ReleaseSystem\DownloadSystem \urllib2.py", line 374, in open response = self._open(req, data) File "D:\p4\depot\Development\HEAD\Build\ReleaseSystem\DownloadSystem \urllib2.py", line 392, in _open '_open', req) File "D:\p4\depot\Development\HEAD\Build\ReleaseSystem\DownloadSystem \urllib2.py", line 353, in _call_chain result = func(*args) File "D:\p4\depot\Development\HEAD\Build\ReleaseSystem\DownloadSystem \urllib2.py", line 1108, in https_open return self.do_open(httplib.HTTPSConnection, req) File "D:\p4\depot\Development\HEAD\Build\ReleaseSystem\DownloadSystem \urllib2.py", line 1075, in do_open raise URLError(err) urllib2.URLError: <urlopen error (1, 'error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol')> Does anyone know why I might be hitting this issue? Any help is greatly appreciated, thanks

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