(Probably a noob question, but I didn't find a solution after googling for 20 minutes.)

I created a new pure Python project with PyCharm which yielded the following folder structure

myproject
└── venv
    ├── bin
    │   ├── activate
    │   ├── activate.csh
    │   ├── activate.fish
    │   ├── easy_install
    │   ├── easy_install-3.5
    │   ├── pip
    │   ├── pip3
    │   ├── pip3.5
    │   ├── python
    │   ├── python3
    │   └── python3.5
    ├── include
    ├── lib
    │   └── python3.5
    ├── lib64 -> lib
    └── pyvenv.cfg

Where do I put myproject.py or the myproject folder now?

• Inside or outside of venv?
• In the venv/binfolder?
• Just inside venv, i.e. myproject/venv/myproject.py?

The virtual environment manages files which aren't yours. It doesn't care how you manage your own files. Put them wherever makes sense to you, just not anywhere inside the venv directory tree. Common solutions include directly in myproject, or in myproject/src.