🌐 Mailman 3 October 2008 - Python-list - python.org

Pyodbc and minimock with doctest
by dj Oct. 31, 2008

Oct. 31, 2008

Hello, I have just started working with minimock in doctest. I want to create a mock pyodbc object which returns a string value when the method execute is called. Here is my doctest: >>> from minimock import Mock >>> import pyodbc >>> def database_response() ... ServerName = 'test_server' ... DbName = 'test_database' ... User = 'test_user' ... Pass ='test_pass' ... connstring ='DRIVER{SQL Server};SERVER=%s;DATABASE=%s;UID= %s;PWD=%s;' % (ServerName, ... DbName, User, Pass) ... cnx = pyodbc.connect(connstring) ... cur = cnx.cursor() ... name = cur.execute("select user_id from user") ... print 'name:%s' % name >>> pyodbc = Mock('pyodbc') >>> pyodbc.connect.mock_returns = Mock('pyodbc') >>> pyodbc.cursor.mock_returns = Mock('pyodbc') >>> pyodbc.execute = Mock('pyodbc.execute', returns=True) >>> pyodbc.execute.returns = 'Return this string.' >>> pyodbc.execute.mock_returns = Mock('pyodbc.execute') >>> database_response() #doctest: +ELLIPSIS ... Here is the output from doctest: ***************************************************************************** File ".\pyodbc_test.txt", line 35, in pyodbc_test.txt Failed example: database_response() #doctest: +ELLIPSIS Expected nothing Got: Called pyodbc.connect({DRIVER{SQLServer}; SERVER=test_server;DATABASE=test_database;UID=test_user;PWD=test_pass;') Called pyodbc.cursor() Called pyodbc.execute('select user_id from users') name: None ******************************************************************************************* The last line of the output, name : Name, should read, name: Return this string. Clearly I am not assigning the string correctly, but I can't figure out what I am doing wrong. Any ideas ?

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Re: Finding the instance reference of an object
by Dale Roberts Oct. 31, 2008

Oct. 31, 2008

On Oct 29, 9:13 pm, Joe Strout <j...(a)strout.net> wrote: > On Oct 29, 2008, at 4:52 PM, Fuzzyman wrote: > > > You're pretty straightforwardly wrong. In Python the 'value' of a > > variable is not the reference itself. > > That's the misconception that is leading some folks around here into > tangled nots of twisty mislogic, ultimately causing them to make up > new terms for what every other modern language is perfectly happy > calling Call-By-Value. Doesn't this logic also apply to Call By Reference? Isn't that term redundant too? (see my 3 C++ examples above). If not, why not? Are you saying that C++ is capable of using the Call By Reference idiom, but C is not, because C does not have a reference designation for formal function parameters? "Call By Object Reference" is an idiom, just like Call By Reference. It is not a physical description of what is going on internally at the register/stack level (which is always just shuffling values around - or flipping bits, as Steven points out), it is a higher level concept that helps people understand the *intention* (not necessarily the implementation) of the mechanism. You cannot look a C++ programmer straight in the eye and say that "Python uses Call By Value, Period", without also informing them that "Python variables can ONLY EVER hold object references - that is the only "value" they can ever hold". Then the C++ programmer will go "Oh, yea, that makes sense". Instead of having to say all of that, we just give it a new name. Instead of "Call By Value, Where Every Single Value Is Only Ever A Reference To An Object Which Contains The Actual Value That Programmers Usually Refer To", we just say "Call By Object Reference". > ... > 2. Because everything in Python is an object, you're not forced to > think clearly (and more generally) about references as values I think we've shown that we are all in fact thinking clearly about it, and we all (you included, of course!) understand what is going on. It's just a matter of what words we choose to describe it. Using your definition of value, though, I believe that if you want to throw out Call By Object Reference, you also have to throw out Call By Reference. See my 3 C++ examples above. And just for fun I did look at the assembler output, and, indeed, the output for examples 1 and 3 is absolutely identical. They are the same thing, as far as the CPU is concerned. Would you give them different names? dale

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ctypes for Jython?
by dudeja.rajat＠gmail.com Oct. 31, 2008

Oct. 31, 2008

Hi All, Is ctypes or something like this available for Jython? -- Regards, Rajat

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[ANN] FOSS Project for grabbing contacts from gmail, yahoo, rediff etc.
by Sanjay Oct. 31, 2008

Oct. 31, 2008

Hi All, Glad to announce a python open source project named ContactGrabber to grab the contact emails from gmail, yahoo, rediff etc. The project is hosted at http://code.google.com/p/pycontactgrabber/ and is also available at cheeseshop. It is now working fine for 'gmail', 'yahoo' and 'rediff'. I am not a python grandmaster and hence would deeply wish somebody taking the project forward. Sanjay

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by fernandena＠gmail.com Oct. 31, 2008

Oct. 31, 2008

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Re: open a new terminal window from another terminal window in linux/unix system
by Paul Boddie Oct. 31, 2008

Oct. 31, 2008

On 31 Okt, 10:50, Tino Wildenhain <t...(a)wildenhain.de> wrote: > gaurav kashyap wrote: > > I am using Microsoft Windows XP.Using putty.exe,I connected to LINUX > > server and a terminal window gets opened.Here i logeed in as root. As pointed out already, root privileges should be used with caution, especially if you don't really know what you're doing. > > What i want to do is open another terminal window from already opened > > terminal window. > > Ugh. As others said and I already guessed, this has nothing to do with > python. It does, albeit tangentially, if the inquirer is looking for a way of doing this conveniently within a Python program. > While this is totally unrelated to this list I'll help you going > into the right direction (but you need to walk yourself): > > http://x.cygwin.com/ > > Basically you would install the x window system and some shell > tools (including openssh client) and then log into the > remote box and start any x window application, also as many > terminals as you can carry. (especially look out for > x-session forwarding etc.) Agreed. This is the most obvious solution. I imagine that there may be all sorts of alternatives, some based on X, others based on other protocols (RDP, NX, perhaps), but SSH with X is commonplace in the free UNIX world these days, and that pretty much sets the agenda for all the other UNIX flavours as well. > > Can this be achieved.If yes,please provide a tested solution > > Ah tested. Haha. Yes many people have done it, so its tested. > > If you provide a contract and pay money you should also be able to > get someone to configure the system in the way you want it :-) Indeed. :-) Returning to the Python aspect, however, there probably isn't a convenient way of just opening the "best" console/terminal program, mostly because there isn't really a convenient way of doing so outside Python. The xdg-utils package, which attempts to provide cross-desktop services as a set of programs, doesn't cover the opening of terminal windows, and it's probably a fair amount of work to inspect the environment and inquire about the user's preferred terminal program for all possible desktop environments, assuming that they all expose this information conveniently. Paul

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Re: modifying locals
by Steven D'Aprano Oct. 31, 2008

Oct. 31, 2008

On Fri, 31 Oct 2008 07:10:05 +0100, Tino Wildenhain wrote: > Also, locals() already returns a dict, no need for the exec trickery. > You can just modify it: > > >>> locals()["foo"]="bar" > >>> foo > 'bar' > That is incorrect. People often try modifying locals() in the global scope, and then get bitten when it doesn't work in a function or class. >>> def foo(): ... x = 1 ... locals()['y'] = 2 ... y ... >>> foo() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 4, in foo NameError: global name 'y' is not defined You cannot modify locals() and have it work. The fact that it happens to work when locals() == globals() is probably an accident. -- Steven

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Python suitable for Midi ?
by Protocol Oct. 31, 2008

Oct. 31, 2008

Hello all Is Python suitable for building a multi-track midi sequencer (with a gui), that would run on windows / mac ? I fail to find sufficient information on this, being a newbie and all. Furthermore, i found references on Python not being really able of multi-threading, that further adds to the confusion. Please assist. Panos

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Re: how to use logging module to log an object like print()
by Vinay Sajip Oct. 31, 2008

Oct. 31, 2008

On Oct 30, 4:34 am, Steve Holden <st...(a)holdenweb.com> wrote: > > Vinay, please tell me whether I was right or wrong ... > What Tim Roberts has already said is right ... my post was highlighting how to mitigate any overhead which is typically (or at least in general terms) higher than the cost of formatting, viz. the computation of the values which get formatted. Regards, Vinay Sajip

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Re: How to open a shell prompt from an existing shell prompt
by gaurav kashyap Oct. 31, 2008

Oct. 31, 2008

Dear Tino, There is no subprocess module in python 2.3.5. My goal is: 1.Open a terminal window and login as root. 2.Issue some command in the terminal window that will open another terminal,similar to the one already opened. Am i clear now.

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