Python programming for beginners

Despite what C codes and Cipher coders may tell us, high-level languages ​​have their place in every programmed toolbox, and some are much more than just a curiosity in computer science. Among the many high-level languages ​​that we can choose from today, Python seems to be the most interesting for those who want to learn something new and do real work at the same time. Its purposeful application of object-oriented programming and clean, easy-to-understand syntax makes it an enjoyable language to learn and use, and it's not something we can say about most other languages.

In Python Training, you will learn how to write applications that use command line options, read and write to pipelines, access environment variables, manipulate interrupts, read and write from files, create temporary files, and write to system logs. In other words, you'll find recipes for writing real apps instead of the old boring Hello World! Things.

start

To get started, if you haven't installed the Python translator on your system, now is the time. To facilitate this step, install the latest Python distribution with packages compatible with your Linux distribution. Rpm, deb and tgz are also available on Linux CD or online. If you follow the standard installation procedures, you will not encounter any problems.

I also recommend that you have a handy Python Reference Reference library; you may want it when the explanations provided here do not meet your needs. You can find it in the same places as the Python tutorial.

Script creation can be done with your favorite text editor as long as it saves text in regular ASCII format and does not automatically insert line breaks when the line is longer than the editor window width.

Always start your scripts with any

#! / Usr / local / bin / python
or

#! / Usr / bin / python

If the access path to the binary snake on your system is different, change this line, and leave the first two characters (#!) Intact. Make sure that this line is really the first line in your script, not just the first non-blank line, but it will save you a lot of frustration.
Use chmod to set file permissions in your script to make it executable. If the script is for you alone, type chmod 0700 scriptfilename.py; if you want to share it with others in your group but not allow them to edit it, use 0750 as the chmod value; if you want to give access to anyone else, use the value 0755 For help with the chmod command, type man chmod.

Read command line options and arguments

Command line options and media are useful when we want to tell our scripts how to behave or pass some media (file names, directory names, usernames, etc.). All programs can read these options and arguments if desired, and your Python scripts are no different.

Applying the appropriate wizards boils down to reading the argv menu and checking the options and media you want to learn about your script. There are a few ways to do this. List 1 is a simple options wizard that recognizes common h, -help and -help options, and when found, exits immediately after the help message is displayed. (Source) – https://www.linuxjournal.com/ article / 3946

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