HELP How do I start Python?

[Johnny Rosenberg]

2014-08-30 17:37 GMT+02:00 GaryTaig <taig at melbpc.org.au>:

>
>
> My knowledge of Linux is purely academic - that is, I know WHAT it is.
> However, when it comes to detail, I still think IBM PC and compatible,
> after 30+ years working in that area. Very little Linux has rubbed off over
> the past few years.
>
> I need to start Python and don't know how.
>
> I'm using Ubuntu 10.04 Lucid which had Python v2.6.5 installed. I needed
> v3.2 and installed it using the following code.
>
> sudo add-apt-repository ppa:fkrull/deadsnakes
> sudo apt-get update
> sudo apt-get install python3.2
>
> That produced about 100+ lines of output in the terminal window and each
> activity reached a conclusion - there were no errors etc.
>
> Before I continue with my project and following more instructions I need
> to be sure that Py3.2 is installed and working. Note: I'm following fairly
> explicit instructions but it doesn't involve this really basic stuff. The
> author has to assume a certain amount of basic knowledge.
>
> In my Applications Menu the Programming Tab contains four items:
> - Bless Hex Editor
> - bpython
> - DrPython
> - CompoZer
>
> I may have opened one or two over the years but like most other stuff with
> Ubuntu, I've used none of them. Anyway, none of these starts Python, either
> 2.6 OR 3.2.  I would have expected to see a menu item? No!
>
> Python3.2 is scattered everywhere. I've searched the entire disk for files
> that are python3.2 related and found many files, directories, but I don't
> know or which files to use to start the ball rolling. I've found
> Executables, links to Executables, links to scripts, lot of stuff.
>
> One doc I found talks about the importance of usr/bin/pythnx.y and yes, I
> have many of them.  There are Python Executables for versions 1, 2, 3 and
> many other files in that directory but just looking at those is
> meaningless. If I was using an IBM based machine I would use an exe or a
> batch file. I was writing batch files in my sleep in 1982 but when it comes
> to Linux I have no idea what starts an app running.  Some help in that area
> might start the ball rolling for me.  I can follow trails, read files,
> understand simple English (and complex) but where is that starting point
> and since Python3.2 would appear to be installed, how can I set up a little
> script that runs it each time?
>
> Perhaps more importantly, how does any other program know? Is there a
> procedure that's followed by all programs when they call upon the services
> of another system?   In DOS based systems we had an environment variable
> called a "path". This path was searched every time a command was issued.
> Stored somewhere in a directory in the path you would expect to find the
> EXE or the batch file needed to start a program or task running. Or, you'd
> set it up that way.
>
> What happens in Linux?
>
> Where is the fabulous tutorial that compares all this stuff?
>
> TIA
> GaryT


If you just want to run some Python commands you can just run Python from a
terminal. Just type:
python3
Exit with Ctrl+d or type:
exit()

If you want to write a Python script, just use any text editor, gedit will
be just fine in many cases.

If you want something more flashy, there are plenty if Python IDEs out
there. I found this page, which might interest you:
http://www.linuxcandy.com/2012/07/which-python-ide-is-best-choose-your-own.html


Kind regards

Johnny Rosenberg
ジョニー・ローゼンバーグ



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