Python Programming For Beginners

Regardless of what assembly code and Chemical coders might tell us, high-level languages do have their place in every programmer’s toolbox, and some of them are much greater than a computer-science curiosity. Out of the many high-level languages we can choose from today, Python seems to be the most interesting for those who would like to learn something new and do real work at the same time. Its no-nonsense implementation of object-oriented programming and its clean and easy-to-understand syntax make it a language that is fun to understand and use, which is not some thing we can say about most other languages.

In Python Training, you will learn how to write applications that use command-line choices, read and write to water lines, access environment variables, handle stops, read from and write in order to files, create temporary files and write to system logs. Put simply, you will find recipes for writing real applications instead of the old boring Hello there, World! stuff.

Getting Started

To begin, in case you have not installed the Python interpreter on your system, now is the time. To make that step easier, install the latest Python distribution using packages compatible with your own Linux distribution. rpm, deb and tgz are also available on your Linux CD-ROM or on-line. If you adhere to standard installation procedures, you should not have got any problems.

I also recommend that you might have the Python Library Reference convenient; you might want it when the explanations given here do not meet your needs. You can find it in the same places as the Python Tutorial.

Creating scripts can be done utilizing your favorite text editor as long as this saves text in plain ASCII format and does not automatically insert line breaks when the line is lengthier than the width of the editor’s home window.

Always begin your scripts with either

#! /usr/local/bin/python
or

#! /usr/bin/python

If the access path to the python binary on your system is various, change that line, leaving the first two characters (#! ) unchanged. Be sure this line is truly the very first line in your script, not just the very first non-blank line-it will save you a lot of frustration.
Use chmod to set the file permissions on your script to make it executable. If the script is for you only, type chmod 0700 scriptfilename. py; if you want to share it with others in your group but not let them edit it, use 0750 as the chmod value; if you want to give access to everyone else, use the value 0755. For assist with the chmod command, type man chmod.

Reading Command-Line Options plus Arguments

Command-line options and arguments come in handy when we want to tell our own scripts how to behave or pass some arguments (file names, directory names, user names, etc . ) to them. All programs can read these types of options and arguments if they wish, and your Python scripts are no different
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