When should I use "development mode"?

I am new to python and I have come across the following command and its description: >Now to be able to run the project you will need to install it and its >>dependencies. >python setup.py develop I looked up what the 'develop' argument does and found: >Extra commands: > develop in

"Development mode"

I am new to python and I have come across the following command and its description: >Now to be able to run the project you will need to install it and its >>dependencies. >python setup.py develop I looked up what the 'develop' argument does and found: >Extra commands: > develop