Weird problem with importing going_modular

[mfarhadirad]

hey Daniel
I got an error when I wrote this code. the only difference that this code has with yours is a space between going_modular and the dot after it. why does this happen? It says No module named 'going_modular. Your code works perfectly. I just want to know why we need a space there.

This is my code:

try:
  from going_modular.going_modular import data_setup, engine
except:
  print('Couldn`t find going madular scripts.. Downloading it...')
  !git clone https://github.com/mrdbourke/pytorch-deep-learning
  !mv pytorch-deep-learning/going_modular. # <--------- **This is the difference between mine and yours**
  !rm -rf pytorch-deep-learning
  from going_modular.going_modular import data_setup, engine

This is your code:

try:
    from going_modular.going_modular import data_setup, engine
except:
    # Get the going_modular scripts
    print("[INFO] Couldn't find going_modular scripts... downloading them from GitHub.")
    !git clone https://github.com/mrdbourke/pytorch-deep-learning
    !mv pytorch-deep-learning/going_modular .
    !rm -rf pytorch-deep-learning
    from going_modular.going_modular import data_setup, engine

[mrdbourke]

Hi @mfarhadirad ,

Great question!

The . can be a little confusing.

Let me explain.

The . is short for "current directory".

For example, if I'm in the directory daniel/ and I write ., it means I'm referring to daniel/.

In the line:

!mv pytorch-deep-learning/going_modular .

It is saying "move the contents of going_modular to here".

As in, if the directory is laid out like:

daniel/
    pytorch-deep-learning/
        going_modular/
            file1.py

And I'm currently in daniel/, it will become:

daniel/
    file.py
    pytorch-deep-learning/
        going_modular/

Another way of thinking of it is:

!mv pytorch-deep-learning/going_modular .

Stands for:

!mv source_files destination_files

So the contents of pytorch-deep-learning/going_modular is the source_files and . (here or the current directory) is the destination_files.

So you need the space in . to differentiate the source_files and the destination_files.

--

Let me know if this helps!

See here for more: https://superuser.com/questions/171871/what-is-the-difference-between-and

[mfarhadirad]

Thank you so much for your clear answer.

[mrdbourke]

You're welcome!

[injamul3798]

Thanks a lot mrdbourke