"""
reference: https://iquanta.org/instruct/python ::: Example 1, Hello World ::: Stephen Lukacs, Ph.D. ©2021-09-19

where this code is run on the server and the "rtn" is a reserved word on this server that returns whatever it's
programmed to return and display on the web browser.  the "rtn" reserved word is only specific to this server and
not python.

on networks such as the largest one, the internet.  there are "servers" that serve up the data and pages to the
"clients" that are the computers or devices that a particular user is typing on and seeing the data and pages
being served by the "server".  this is called the "client-server" model.  there may be one sever but many many
clients.  this server is one computer in Virginia that serves to any client computer or device in the U.S.A.
the below code is processed on the server, called server-side processing, and is then sent to the client as a
page the client just displays.  there is also client-side processing where the server serves a dead page and the
processing occurs on the client-side which then displays the results for the user.  there are client-side examples
to learn from also.

also, web browsers run their own code to input and display what is programmed for web browsers.  web browsers use a
language called HTML, or HyperText Markup Language.  HTML uses a system of marked up tags that are surrounded by the
less than and greater than characters with designators in them to direct the web browser to display certain elements.
an element is a HTML section.  below, the <b>, <i>, and <br> are HTML markup tags that section off into the bold, italic,
and new-line sections as shown.  the web browser reads these tags, converts them into section elements, and then
displays the text as directed...
"""
#single line or after inline comment, and real executable code now...
from yatl.helpers import XML
rtn = "<b><i>Hello World!</i></b>  Testing 1 2 3.. ."
rtn += "<br/>This is a test of the <b>American Broadcast System</b>.  This is only a test."
rtn = XML(rtn)
#where the html tags, <br/> and <br>, will be properly escaped to render as an html tag.