bug (resolved) with “Mount drive” web-button in colab. Accessing “shared with me” files from google colab (y2020, previous solutions seem to fail)

Question

[ Newer Edit]: colab team reported that they corrected the issue on May 27 2020. I have checked - it works Okay for me now.
Link to issue: https://github.com/googlecolab/col

Answer 1

Suppose you want to read a shared csv file from drive. You have done "Add shortcut to Drive".

1) At Colab Notebook Connect to your drive.

# Import PyDrive and associated libraries.
# This only needs to be done once per notebook.
from pydrive.auth import GoogleAuth
from pydrive.drive import GoogleDrive
from google.colab import auth
from oauth2client.client import GoogleCredentials

# Authenticate and create the PyDrive client.
# This only needs to be done once per notebook.
auth.authenticate_user()
gauth = GoogleAuth()
gauth.credentials = GoogleCredentials.get_application_default()
drive = GoogleDrive(gauth)

2) Get the id of shared file you want to access. Open file -> go to linksharing [https://drive.google.com/open?id=1JKECh3GNry6xbAK6aBSzQtSntD4GTEl ] -> copy the the string after 'id='

3) back to colab

# A file ID looks like: laggVyWshwcyP6kEI-y_W3P8D26sz
file_id = '1JKECh3GNry6xbAK6aBSzQtSntMD4GTEl'

downloaded = drive.CreateFile({'id': file_id}) #important
print(downloaded['title'])  # it should print the title of desired file
downloaded.GetContentFile('file.csv')  
#Finally, you can read the file as pandas dataframe. 
import pandas as pd
df= pd.read_csv('file.csv') 

Note : This is my first ever answer to a stack overflow question