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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
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Disc space free within an application
File Handling example from a Well House Consultants training course
More on File Handling [link]

This example is described in the following article(s):
   • Python - fresh examples from recent courses - [link]
   • Running an operating system command from your Python program - the new way with the subprocess module - [link]

Source code: sys.py Module: Y110

""" This is an example in which we call a generic function of our
own - "getdiscspace" - which then calls different code depending on
the host operating system. This technique, known as "wrapping", means
that our main application can be operating system independent, even
though OS dependent code is being called internally """


from os import *
import re

def getdiscspace():

""" Wrapper to call in disc space
        code for the appropriate OS """


        if name == "nt":
                rv = getdiscspace_doze()
        else:
                rv = getdiscspace_ixux()
        return rv

def getdiscspace_ixux():

""" Disc space - Linux or Unix"""

        space = re.compile(r'\s+')
        ph = popen("df -k")

        retval = []
        lr = 0
        for result in ph.readlines():
                lr += 1
                if lr < 2:
                        continue
                fol = space.split(result.strip())
                if not fol[0].startswith('/'):
                        continue
                retval.append( [fol[0],fol[4],fol[5]] )

        return retval

if __name__ == "__main__":
        stuff = getdiscspace()
        print stuff

""" Sample Output:

wizard:pyoo graham$ python sys.py
[['/dev/disk0s2', '13%', '/'], ['/dev/disk1s2', '69%', '/Volumes/Skype']]
wizard:pyoo graham$

"""

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Python
 * Python Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Python are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "File Handling" training module. You'll find a description of the topic and some other closely related examples on the "File Handling" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
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The Horse's mouth provides a daily tip or thought.
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• All of these resources can be searched through through our search engine
• And there's a global index here.

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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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This web site is written and maintained by Well House Consultants.

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