Pandas Dataframe Check if column value is in column list

Question

I have a dataframe df:

data = {\'id\':[12,112],
        \'idlist\':[[1,5,7,12,112],[5,7,12,111,113]]
       }
df=pd.DataFrame.from_dict(data)
         


        

Answer 1

By using issubset

df.apply(lambda  x : set([x.id]).issubset(x.idlist),1).astype(int)
Out[378]: 
0    1
1    0
dtype: int32

By using np.vectorize

def myfun(x,y):
    return np.in1d(x,y)


np.vectorize(myfun)(df.id,df.idlist).astype(int)

Timing :

%timeit np.vectorize(myfun)(df.id,df.idlist).astype(int)
10000 loops, best of 3: 92.3 µs per loop
%timeit df.apply(lambda  x : set([x.id]).issubset(x.idlist),1).astype(int)
1000 loops, best of 3: 353 µs per loop