[Tutor] UPDATED: Question on how to open other programs and files

Mon Feb 9 04:05:59 CET 2009

Re: Question on how to open other programs and files (Alan Gauld)

Sorry for being confusing on my last e-mail. I will try to clarify my
intents a bit further. In short, I want to be able to read the data in the
file as well as launch document viewer in Python. For one of the files I
want to read the data from a Python script that's in the same folder as the
GUI Python script. For the pdf file I simply want to be able to launch
document viewer from Python. I know it is probably a lengthy and demanding
request, but I just want to be able to do both eventually in my GUI program.
I am still very new at Python, and so any help would be very useful for me.
I have tried to look up different tutorials online, but I have not found one
that addresses my issues.

On Sun, Feb 8, 2009 at 1:10 AM, <tutor-request at python.org> wrote:

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> Today's Topics:
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>   1. Completed project. Is this correct? Can I simplify my
>      formulas? (cclpianos at comcast.net)
>   2. Oops! I just corrected my file:RE Completed project is this
>      correct? (cclpianos at comcast.net)
>   3. Question on how to open other programs and files (Hi)
>   4. Re: Exec(uting) Code in a Dictionary? (spir)
>   5. Re: Question on how to open other programs and files (Alan Gauld)
>   6. Re: WINSOCK stdin question (Alan Gauld)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 7 Feb 2009 20:45:25 -0700
> From: cclpianos at comcast.net
> Subject: [Tutor] Completed project. Is this correct? Can I simplify my
>        formulas?
> To: tutor at python.org
> Message-ID: <4070A0F9-63DC-4BBF-80FA-6D369B65672D at comcast.net>
> Content-Type: text/plain; charset="us-ascii"; Format="flowed";
>        DelSp="yes"
>
> Hello, I've enclosed a completed project (my first!) and would like
> to know of it's accuracy. Also, what I could do to simplify the
> language.
>
> Thanks,
>
> Pat
>
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> ------------------------------
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> Message: 2
> Date: Sat, 7 Feb 2009 21:02:21 -0700
> From: cclpianos at comcast.net
> Subject: [Tutor] Oops! I just corrected my file:RE Completed project
>        is this correct?
> To: tutor at python.org
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> Forget the first, this is the corrected version.
>
> Thanks,
>
> Pat
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> ------------------------------
>
> Message: 3
> Date: Sat, 7 Feb 2009 22:09:04 -0800
> From: Hi <haztang17 at gmail.com>
> Subject: [Tutor] Question on how to open other programs and files
> To: tutor at python.org
> Message-ID:
>        <ef0bf91e0902072209l31dd6027sb2ba0104a38c79ce at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I have a question regarding how to open other programs and files in Python
> code. I am creating a simple interface and I want it to be able to open
> other files, such as a text file or a pdf file. However, those files are
> usually associated with other programs - for instance, gedit for text and
> document viewer for pdf (I am using Ubuntu 8.10). What syntax or commands
> do
> I need in order to do so. I've used os.popen in Windows XP and it works
> fine, but the same code does not work in Ubuntu. This is the part of my
> code
> that deals with opening files/programs:
>
> def openfile(self, event):
>     result =  os.popen("home/user/textfile.txt")
>
> In the terminal it simply says, sh: home/user/textfile.txt: not found. And
> I
> have already set permissions via chmod +x on the files of my choosing. Any
> help would be greatly appreciated.
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> ------------------------------
>
> Message: 4
> Date: Sun, 8 Feb 2009 09:56:03 +0100
> From: spir <denis.spir at free.fr>
> Subject: Re: [Tutor] Exec(uting) Code in a Dictionary?
> To: tutor at python.org
> Message-ID: <20090208095603.70a1f24e at o>
> Content-Type: text/plain; charset=UTF-8
>
> Le Sat, 07 Feb 2009 13:50:01 -0800,
> Wayne Watson <sierra_mtnview at sbcglobal.net> a ?crit :
>
> > That's something for me to ponder, setattr. I'd rather not go off and
> pick up on something like ConfigParser at this stage. I'd like to keep this
> code somewhat simple and easy to understand, but yet have some flexibility
> for changes.
>
> Dicts are very handy because they are still starightforwardly usable when a
> name/key is unknown at design time, in addition to the value:
>
> d["foo"] = val
> d[name] = val
>
> A typical use is precisely reading data from a config file where both names
> and values are data, meaning defined by the user. So that you cannot
> directly store them in a custom config object writing:
>
> config.name = val
>
> Setattr addresses this need:
>
> setattr(config,name,val)
>
> So that finally using an object or a dict are more or less equivalent,
> rather a programmer choice.
> * dict is slightly easier
> * object allows slightly lighter code (obj.name vs obj["name"]) and a
> syntax better consistent with the rest of python
> * additionnal data attibutes, custom behaviour
>
> Denis
>
>
> ------
> la vida e estranya
>
>
> ------------------------------
>
> Message: 5
> Date: Sun, 8 Feb 2009 09:03:07 -0000
> From: "Alan Gauld" <alan.gauld at btinternet.com>
> Subject: Re: [Tutor] Question on how to open other programs and files
> To: tutor at python.org
> Message-ID: <gmm74e$cai$1 at ger.gmane.org>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>        reply-type=original
>
>
> "Hi" <haztang17 at gmail.com> wrote
>
> >I have a question regarding how to open other programs and files in
> >Python
> > code. I am creating a simple interface and I want it to be able to
> > open
> > other files, such as a text file or a pdf file.
>
> OK, lets clarify something first.
> When you say open do you mean you want to open the file in Python
> such that you can read the data into your python program? Or do
> you mean you want to open the file in the default application on
> your computer. In other words for a pdf file do you want to read
> the data in the file or do you want to launch Acrobat on the file?
>
> > usually associated with other programs - for instance, gedit for
> > text and
> > document viewer for pdf (I am using Ubuntu 8.10). What syntax or
> > commands do
> > I need in order to do so.
>
> The "official" approach to laumnching applications is to
> use the subprocess module. This replaces several other
> mechanisms which are now considred obsolete.
>
> > I've used os.popen in Windows XP and it works
> > fine, but the same code does not work in Ubuntu.
>
> It should work but subprocess replaces popen.
>
> > def openfile(self, event):
> >     result =  os.popen("home/user/textfile.txt")
> >
> > In the terminal it simply says, sh: home/user/textfile.txt: not
> > found.
>
> I suspect your path is wrong. Notice you are not using
> an absolute path but a relative path, so unless you have
> a directory called home in your current directory it will fail.
>
> But this is not opening the text file this is trying to execute
> the text file and that is unlikely to work on Ubuntu. (In Windows
> it will launch the default app - probably Notepad) So back to
> the original question: do you want to open the t5extfile in
> Python or do you want to launch gedit from Python?
>
> Untiol you resolve that conundrum we can't really help
> much more.
>
> HTH,
>
> --
> Alan Gauld
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Sun, 8 Feb 2009 09:08:09 -0000
> From: "Alan Gauld" <alan.gauld at btinternet.com>
> Subject: Re: [Tutor] WINSOCK stdin question
> To: tutor at python.org
> Message-ID: <gmm7ds$cv8$1 at ger.gmane.org>
> Content-Type: text/plain; format=flowed; charset="utf-8";
>        reply-type=original
>
> > Yes, this is exactly what I am looking to accomplish.
> > On one host I have an application that is sending
> > cmd.exe to a second host.
>
> OK, how is that application doing that? What port is
> it sending the output to on the remote host? You say
> CMD.exe but that is the windows shell. There is no
> way to direct it to another host directly so how is
> this application redirecting cmd.exe? Does it have
> a name?
>
> You might need to write two programs, one on the
> host computer to run and redirect cmd.exe to the
> remote PC and then relay the returned data as
> input to CMD.exe as well as another app on the
> remote PC to pick up the incoming data and
> relay the user input back down the socket.
>
> We need to know a lot more about how this thing
> is glued together.
>
> Alan G.
>
>
>
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