able to use either version whenever you see the python command in this bookenter python instead most linux distributions have python already installedbut if for some reason yours didn' or if your system came with python and you want to install python refer to appendix installing text editor geany is simple text editorit' easy to installwill let you run almost all your programs directly from the editor instead of through terminaluses syntax highlighting to color your codeand runs your code in terminal window so you'll get used to using terminals appendix provides information on other text editorsbut recommend using geany unless you have good reason to use different editor you can install geany in one line on most linux systemssudo apt-get install geany if this doesn' worksee the instructions at thirdpartypackagesrunning the hello world program to start your first programopen geany press the super key (often called the windows keyand search for geany on your system make shortcut by dragging the icon to your taskbar or desktop then make folder somewhere on your system for your projects and call it python_work (it' best to use lowercase letters and underscores for spaces in file and folder names because these are python naming conventions go back to geany and save an empty python file (file save ascalled hello_world py in your python_ work folder the extension py tells geany your file will contain python program it also tells geany how to run your program and highlight the text in helpful way after you've saved your fileenter the following lineprint("hello python world!"if multiple versions of python are installed on your systemyou need to make sure geany is configured to use the correct version go to build set build commands you should see the words compile and execute with command next to each geany assumes the correct command for each is pythonbut if your system uses the python commandyou'll need to change this if the command python worked in terminal sessionchange the compile and execute commands so geany will use the python interpreter your compile command should look like thispython - py_compile "%