now we'll set up sublime text to be as efficient as possible by customizing the features mentioned at the beginning of this appendix converting tabs to spaces go to view indentation and make sure there' check mark next to indent using spaces if there isn'tcheck it setting the line length indicator go to view rulerand then click sublime text will place vertical line at the -character mark indenting and unindenting code blocks to indent block of codehighlight it and select edit line indent or press ctrl-to unindent block of codeclick edit line unindent or press ctrl-commenting out blocks of code to comment out highlighted block of codeselect edit comment toggle commentor press ctrl-to uncomment block of codeissue the same command again idle idle is python' default editor it' little less intuitive to work with than geany or sublime textbut you'll see references to it in other tutorials aimed at beginnersso you might want to give it try installing idle on linux if you're using python install the idle package like thissudo apt-get install idle if you're using python install the idle package like thissudo apt-get install idle installing idle on os if you used homebrew to install pythonidle is probably already on your system in terminalrun the command brew linkappswhich tells idle how to find the correct python interpreter on your system you'll then find idle in your user applications folder appendix