If you are running a Jupyter notebook server on your own machine, then you can access any file on your file system. E.g.:
import pandas as pd
df = pd.read_csv('/home/you/bar/foo.csv')If you are working with a notebook on Data Lab's notebook server, you can upload a local file to your notebook space, by clicking (from a notebook view) on "File/Open...", and in the following "dashbord" view on the "Upload" button in the upper right corner.
Note that this is only suitable for relatively small files! The current limit (set by the notebook server) is 25 MB.
If you need to upload larger files, please use the Data Lab command line client to upload the file(s) to your vospace.