The Python Standard Library is available with every Python installation. It contains a huge number of very useful modules. It is important that you become familiar with the Python Standard Library since most of your problems can be solved more easily and quickly if you are familiar with this library of modules.
We will explore some of the commonly used modules in this library. You can find complete details for all of the modules in the Python Standard Library in the 'Library Reference' section in the documentation that comes with your Python installation.