What is m5? Is it a dependency? How do get it?

[kaddkaka]

I cloned the gem5 repo, got the listed dependencies installed with apt on my Ubuntu machine. Built gem5. Then I tried running one the demoes but got:

$ python3 configs/example/gem5_library/riscv-demo-board-run/py
Traceback (most recent call last):
  File "/local/gem5/configs/example/gem5_library/riscv-demo-board-run.py", line 47, in <module>
    import m5
ModuleNotFoundError: No module named 'm5'

What am I missing?

[kaddkaka]

And similarly:

$ python3 config/example/gem5_library/arm-demo-ubuntu-run.py
Traceback (most recent call last):
  File "/local/gem5/configs/example/gem5_library/arm-demo-ubuntu-run.py", line 41, in <module>
    from gem5.isas import ISA
ModuleNotFoundError: No module named 'gem5'

[kaddkaka]

I figured out that the python file should be as input to gem5.