The Python language has many similarities to Perl, C, and Java.
Beginners start at the beginning, and experienced programmers jump in further along. Learn to Program using Python: Lesson 1, Getting Started provides an overall description of this online programming course.
Introduction I have been taking it slow and easy for the first few lessons. My informal discussion has been designed to familiarize you with the Python interactive programming environment while teaching you some important programming concepts at the same time.
It's time to learn about scripts This lesson provides an introduction to the use of scripts, and of necessity will depart from the interactive mode used in previous lessons.
Some system stuff Unfortunately, it will be necessary for me to get into some system stuff in this lesson. I still plan to write this lesson at a level appropriate for beginning programmers.
It will be necessary for me to get into some system stuff that really has nothing in particular to do with Python programming. Rather, it will involve getting your computer set up for using scripts with Python.
What Is A Script? Up to this point, I have concentrated on the interactive programming capability of Python. This is a very useful capability that allows you to type in a program and to have it executed immediately in an interactive mode.
|Python Main Function with Examples: Understand __main__||I try to make the parts that are not verbatim to be descriptive of the expected use.|
But, interactive can be burdensome By now you may have realized that you sometimes find yourself typing the same thing over and over. That is where scripts are useful. Scripts are reusable Basically, a script is a text file containing the statements that comprise a Python program.
Once you have created the script, you can execute it over and over without having to retype it each time.
Then you can execute each of the individual versions. In this way, it is easy to create different programs with a minimum amount of typing.
You will need a text editor Just about any text editor will suffice for creating Python script files. You can learn about it at the following URL: Must be a plain text editor Whichever editor you choose, make certain that it produces plain ASCII text in its output no bold, no underline, no italics, etc.
Combining scripts with interactive mode It is also possible to combine script files with interactive mode to incorporate pre-written scripts into interactive programs. Getting Started In order to use script files, you must prepare you computer to use them.
This doesn't amount to much in the way of effort, but it is critical. Where is Python located?unittest2 is a backport of Python ’s unittest module which has an improved API and better assertions over the one available in previous versions of Python.
If you’re using Python or below, you can install it . Nov 24, · Writing the Setup Script¶ The setup script is the centre of all activity in building, distributing, and installing modules using the Distutils. The main purpose of the setup script is to describe your module distribution to the Distutils, so that the various commands that operate on .
The Python language has many similarities to Perl, C, and Java. However, there are some definite differences between the languages.
Invoking the interpreter with a script parameter begins execution of the script and continues until the script is finished. When the script is finished, the interpreter. In Python "if__name__== "__main__" allows you to run the Python files either as reusable modules or standalone programs.
Like C, Python uses == for comparison while = for assignment. Python interpreter uses the main function in two ways.
On my machine, the file named ashio-midori.com is in a directory named Python, which in turn is contained in a directory named Program Files on my D-drive. My directory listing To help you get oriented, here is a list of files appearing in my Python directory running under the WinNT Workstation operating system.
It is a good convention to have the main action of a program be in a function for easy reference. Python functions can return any type of data, not just numbers, For the logic of writing functions, it is important that the writer of a function knows the names of variables inside the function.