pandas left join where right is null on multiple columns

Question

I have two pandas df x and y, both with the same 3 columns A B C (not nullable). I need to create a new df z, obtained by \"subtracting from x the rows which are entirely id

Answer 1

I think need merge with indicator and filter only rows from left DataFrame:

df = x.merge(y, indicator='i', how='outer').query('i == "left_only"').drop('i', 1)
print (df)
    A   B    C
0  q1  q2   q3
2  q7  q2  q93