How to have django-admin recognized in Eclipse/LiClipse?

Question

I've been trying to execute django-admin from within a LiClipse project using:

projectName = "someProject"
command = 'django-admin startproject ' + projectName
process = subprocess.Popen(command.split(), stdout=subprocess.PIPE)

and also

subprocess.check_call(shlex.split(command))

But each time I get the error:

FileNotFoundError: [Errno 2] No such file or directory: 'django-admin'

However, when I run the same program from the Linux terminal using python3 main.py, it works fine.

So I figured it might be because django-admin's path isn't added to PYTHONPATH. I did a locate "django-admin" to find these paths:

/home/nav/.pyenv/shims/django-admin
/home/nav/.pyenv/shims/django-admin.py
/home/nav/.pyenv/versions/3.8.7/bin/django-admin
/home/nav/.pyenv/versions/3.8.7/bin/django-admin.py
/home/nav/.pyenv/versions/3.8.7/bin/__pycache__/django-admin.cpython-38.pyc
/home/nav/.pyenv/versions/3.8.7/lib/python3.8/site-packages/django/bin/django-admin.py
/home/nav/.pyenv/versions/3.8.7/lib/python3.8/site-packages/django/bin/__pycache__/django-admin.cpython-38.pyc

and added it to PYTHONPATH...

...but I get the same error when I run the program from within LiClipse.

Does anyone know why this problem is happening and how it can be fixed?