On 14/03/13 21:25, Christopher Emery wrote:
Okay, I know the best way to learn how to do something is to jump in so
I have decided I would like to make a program (command line) to get
files from a website that will be then used later on by another program.
OK, thats a good place to start.
Next step, having thought about what you want, is to step back and pick
a single scenario and build that. Once it workls add the next thing you
want, repeat till complete.
Program idea - quick steps to do
***
file-fetcher (within zip file)
get internet location of files (ex: http://www.get_file.get/file_??.zip
get name of files
These can be interactively from a user or from a config file
or from command line arguments.
check date of file
download file
This could use the ftp module if the far end has an ftp server running.
unzip file
Using the zipfile module?
delete zip file after saving the txt file
Yep, that looks like a fair start.
***
Here are the things I need it to do:
* if its ran just with its name file-fetcher.py then it should ask for
location of file(s)
using input() and a test of sys.argv
* it should also ask for a list of files to download seperated by a
corma "," or by a file with a line by line list of files to download
you need to work out how you identify which it is. For starters stick
with a single file input by the user...
* it should be able to download files that are zip or other format such
as txt,
ok, but pick one to start.
* if its ran with file-fetcher.py -L=url -F=file.zip, file.txt
worry about options later and look at the various modules for parsing
command line options - there are a few variants.
* if its a zip file it need to extract the file(s) from it
* it then need to put the downloaded, extracted files into a directory
* it then needs to delete the zip file
zipfile, the os and shutil modules should all help here.
* it needs to check for the date before downloading the whole file,
maybe download the first few bytes to check time stamp
if its ftp then the standard ftp commands should do all you need.
Okay with the above said, how should I start to do psceduo code?
you almost have above.
Would each of the above be a function within the program?
probably.
Any advise on class that exist that can make this process easier?
see above for useful modules.
read the documentation for each.
experiment at the >>> prompt.
How would someone run a command that is normally done at the command
line like espeak within python program?
look at the subprocess module documentation.
Also how would I hide the
visual output of a command like espeak, it throws alot of erros but it
works, it happens to others using it too.
see last comment.
HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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