all rows in df1 that are NOT in df2

Question

I have a df (df1) that looks like:

df1 = pd.DataFrame([
        [\'YYZ\', \'SFO\', 1],
        [\'YYZ\', \'YYD\', 1],
        [\'YYZ\', \'EWR\', 1],
        [\'Y         


        

Answer 1

the ~ symbol reverses the isin and makes it effectively a isnotin