[pythonvis] Re: How Do You GGet and Set Up a Python Module?
- From: Jim <jhomme1028@xxxxxxxxx>
- To: pythonvis@xxxxxxxxxxxxx
- Date: Thu, 18 Sep 2014 13:52:45 -0400
Hi,
When you install a module, is there a "normal" place it puts its
documentation? As I was installing MarkDown, I heard it say it was
writing HTML files, but since it did not say where it was putting
them, I'm unsure where to look. I tried to look in my Python directory
tree for the files, because I thought that if I heard their names, I
would recognize them, but I was unsuccessful. I also went into the
Python interpreter and determined that I could go into the help system
and type something like help markdown and get a ton of documentation
to come onto my screen. Is there a way to still be in the Python
interpreter's help system and make help commands go to a file?
Thanks.
Jim
On 9/17/14, Jeffrey Thompson <jthomp@xxxxxxxxxxx> wrote:
> Jim and other pythonistas,
> Most modules that have "dependencies"will
> have the appropriate modules imported
> at the top of the code.
> So you usually don't have to worry about dependencies.
>
> Additionally, Python does not perform any import command twice;
> so if we import 2 modules,
> both of them have an import random at the top of their code.
> Python recognizes that random has been imported by module 1 and doesn't
> need
> to import it again in module 2.
> So that is something you don't have to worry about.
>
> jet (Jeffrey Thompson)
>
> -----Original Message-----
> From: pythonvis-bounce@xxxxxxxxxxxxx
> [mailto:pythonvis-bounce@xxxxxxxxxxxxx]
> On Behalf Of Jim
> Sent: Wednesday, September 17, 2014 7:15 PM
> To: pythonvis@xxxxxxxxxxxxx
> Subject: [pythonvis] Re: How Do You GGet and Set Up a Python Module?
>
> Hi,
> Jeff, you propted a question and a memory of a link that I have saved.
> First the question. Oh, by the way, I was successful in getting pip
> set up, so I'm going to see if I can get it to install MarkDown next.
> Here is the question. How can you find out if a module you are
> thinking of installling might depend on another module?
>
> Thanks.
>
> Jim
>
> On 9/17/14, Jeffrey Thompson <jthomp@xxxxxxxxxxx> wrote:
>> Hi Jim and other pythonistas,
>>
>> Thanks for the posts by Stephanie and Deenadayalan Moodley
>>
>> After you have installed the MarkDown code, then to use MarkDown in
>> your program you must import the desired module or it's functions,
> classes,
>> etc.
>>
>> import statements are usually put at the very top of the program
>> code.
>> Once imported, the code is available for any function or method or class
>> that wants to use any imported items.
>> Should you place it lower down in your code, it may generate a "item not
>> found" error messagewhen trying to execute the desired imported code.
>> So to avoid this problem, you can do what many programs do,
>> which is to place the import statements at the beginning of your code .
>>
>> You import a module using the import command:
>> code start ---
>> import MarkDown
>> # if you wish to use a Data element or function or class from MarkDown
> then
>> you would type:
>> from Markdown import A_class, A_data_element
>> # You can import as many items as you want to from Markdown.
>> # end code ---
>>
>> As above, you can import more than one item from a module;
>> and the items imported can be on different lines of code.
>> This may be preferable for sighted users
>> to not go too far to the right of the visible page that they are viewing.
>>
>> If you do not select individual items,
>> you can get everything with:
>> code start ---
>> import MarkDown
>> end code---
>>
>> If you are using a number of items in MarkDown, then it makes sense to
>> download the entire module.
>> On the other hand, you can be importing a lot of code that your program
>> will
>> never use;
>> and whatever you import has to be scanned in the first pass of the
>> interpreter before the program starts executing your code.
>> So being specific saves a little execution time,
>> and gives the programmer an idea of what you're doing with this imported
>> module.
>> But you do have to type a little morecode if you get specific.
>>
>> You can find what's in a module by reading any description or
> documentation
>> which sometimes as a separate file, such as a
>> "read me" file which is inside the module.
>> All the modules from the Python Standard Reference Library are downloaded
>> when you install python from python.org
>> There is plenty of stuff there to do a lot of what programmers want done.
>>
>> There are also 3rd party python libraries,
>> and even 3rd party versions of python,
>> which have certain characteristics that make them more attractive to use
>> for
>> developing certain kinds of programming.
>> Note: 3rd party code may require a monetary payment to use.
>>
>> As far as 3rd party libraries is concerned,
>> There may be documentation on there website or as a separate file in the
>> module,
>> or a description or documentation within each of the components within
>> the
>> module.
>>
>> Many modules may have a "set-up" installation function.
>> which will place the module in the correct place so that it will be
>> recognized by the Python.exe application when it starts up.
>>
>> There are numerpous guides and even books which can provide
>> in-depth description and uses of the various standard modules.
>> This is one from python.org:
>> https://docs.python.org/2/library/
>>
>> Jet (Jeffrey Thompson)
>>
>> -----Original Message-----
>> From: pythonvis-bounce@xxxxxxxxxxxxx
>> [mailto:pythonvis-bounce@xxxxxxxxxxxxx]
>> On Behalf Of Jim
>> Sent: Monday, September 15, 2014 2:45 PM
>> To: pythonvis
>> Subject: [pythonvis] How Do You GGet and Set Up a Python Module?
>>
>> Hi,
>> There is a Python module called MarkDown. I want to learn how to set
>> it up and use it. I tried to understand the process on the Python
>> Package Index. I'm lacking confidence that I will get it done
>> correctly. Does anyone have guidance on how to do this? And after I
>> get it on my computer, how do I read the documentation for it?
>>
>> Thanks.
>>
>> Jim
>>
>> --
>> e+r=o
>> Skype: jim.homme
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>
>
> --
> e+r=o
> Skype: jim.homme
> List web page is
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>
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>
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>
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