The basic installation of Python does not include any packages other than NumPy, but additional Python packages can be installed. The selected default Python installation is the virtual environment named GMS_VENV_PYTHON. You can use both pip and conda commands to install packages to this environment from the Anaconda Prompt, however, pip is recommended as conda may change the Numpy configuration.
This tutorial walks through how to add script packages to customize the Python environment in the DigitalMicrograph software.