&lt;p&gt;Flask is a web micro framework for Python based on &amp;ldquo;Werkzeug, Jinja 2 and good intentions&amp;rdquo; BSD licensed. Werkzeug and jingja are two of its dependencies.&lt;br /&gt;&lt;br /&gt;Flask is part of the micro-framework. Which means it will have little to no dependencies on external libraries.&amp;nbsp; It makes the framework light while there is little dependency to update and less security bugs.&lt;/p&gt;