Hello, World! (Python series)
June 23rd, 2013 // 2:08 pm @ Arad Gharagozli
Welcome back.
Without further ado, I will start this section. Hopefully you have Python ready and installed on your OS. Since I am not a big fan of programming in under Win I chose to use Ubuntu, Python usually comes with most Unix distros. Same story with Ubunto. To make sure you’ve got Python ready just type
arad@ubunto-01:Python --version Python 2.7.3
Aright, I am not going to cover the ‘how to install Python’, since there are several great tutorial online. So if you need to install, just do so and then we can continue from there.
As I described before, Python is a very simple but extremely powerful program. for our first program we are going to re-produce the good old ‘Hello, World’ program.
1- Within the desire folder create a blank Python page
nano hello.py
* Note the .py extension, this is Python’s extension
We start the code by initializing Pythons directory to our code. THIS IS VERY IMPORTANT, or Python won’t be recognized
#!/usr/bin/python
that path points to where I have the Python installed. This is the default Dir for most Linux distros. change that link ONLY IF you have Python installed somewhere else.
next is print directtive. This is so simple you won’t even believe it
print 'Hello, world!'
That’s it…! I know, it’d mind blowing, NOTE that I didn’t use semicolon (;) at the end of my directive unlike most other programs. So this is our code at the end
#!/usr/bin/python print 'Hello, world!'
Save the code, and Exit.
Now, before you can run your program you have to grant access to the *.py . We can do that by using the chmod (CHange MOD ) command
arad@ubunto-01:chmod +x hello.py
Unlike C you don’t need to compile it, so just run with Python Extension. You should get a result like this
arad@ubunto-01:./hello.py Hello, world!
Congratulations! You just wrote your very first Python. Stay tune for more fun with Python
