Coding standards

Base rules

source code should be editable by line
indentation is 4 spaces
every child line of code must have one indentation level from its parent

Python

http://www.python.org/dev/peps/pep-0008/

HTML

Example:

<div>
    <div>
        <p>
        It doesn't matter if this is indented
        </p>
    </div>
<div>

CSS

Example:

.foo,
.bar,
.test
{
    x: y;
}