an example in operation the web examples folder provides simple web serverbuilt into pythonthat you can run on your own computer (it is also possible to set your computer up with the right software to be server for the internet that is totally unnecessary for this class windows in an operating system file windowgo to the folder with the www examples depending on the setup of your operating systemthere are several ways to start the local server that might work double click on startserver cmdwhich have placed in the example www folder if this does not worktry right click on localcgiserver py in the file explorer windowand select open with -python launcher if neither workcheck if you need to modify your python installationcovered in some special windows instructions (page )and then try the startserver cmd approach again mac this is more involved the first time see some special mac instructions (page you should see console window pop upsaying "localhost cgi server startedthis approach starts the localcgiserver py server without monopolizing idle once the server is startedleave the server console window there as long as you want the local server running for that folder warningdo not start the local server running from inside idle it will monopolize idle noteif the server aborts and gives an error message about spaces in the pathlook at the path through the parent directories over this www directory if any of the directory names have spaces in themthe local file server will not work in case of this erroreither go up the directory chain and alter the directory names to eliminate spaces or move the examples directory to directory that does not have this issue for very simple but complete example make sure you have the local server going open the web link you see web form follow the instructionsenter integersand click on the find sum button you get back web page that obviously used your data look at the local server console window you should see log of the activity with the server we will end up completely explaining the web pages and cgi file needed to accomplish thisallowing you to generalize the ideabut for now just see how it works first consider the rather involved basic execution steps behind the scene the data you type is handled directly by the browser it recognizes forms an action instruction is stored in the form saying what to do when you press button indicating you are ready to process the data (the find sum button in this case in the cases we consider in this tutorialthe action is given as web resourcegiving the location of cgi script on some server (in our casesthe same directory on the server as the current web pageit is resource handled by the local serverwhen the url starts with "file all the url' you use for this section and its exercises should start that way when you press the buttonthe browser sends the data that you entered to that web location (in this case adder cgiin the same folder as the original web page cgi dynamic web pages