pyCharm Community Edition is best Free IDE for Python/Django. This is created by JetBrains, they make many popular IDE for differnt programming languages like IntelliJ IDEA for Java, phpStrom for PHP, AndroidStudio for Android development and more.
https://www.jetbrains.com/pycharm/
PyCharm support Python Django Web framework.
Another good light weight editor for python is SublimeText.
