where i can find custom library for plotting graphs, lab_utils_common.py
I don’t see that file being used in either of the assignments in Week 1 of ML in Production, but in general, you should see the contents of the directory as shown in this screen shot from the Week 2 assignment:
You can see that I highlighted a file called lab_utils.py. If you then “right click” on that file name, you get a menu that includes “Download” among other possible actions:

