Check for existence of multiple columns

Question

Is there a more sophisticated way to check if a dataframe df contains 2 columns named Column 1 and Column 2:

if numpy.all(map(lambda c: c in df.columns, ['Column 1', 'Columns 2'])):
    do_something()

Answer 1

You can use Index.isin:

df = pd.DataFrame({'A':[1,2,3],
                   'B':[4,5,6],
                   'C':[7,8,9],
                   'D':[1,3,5],
                   'E':[5,3,6],
                   'F':[7,4,3]})

print (df)
   A  B  C  D  E  F
0  1  4  7  1  5  7
1  2  5  8  3  3  4
2  3  6  9  5  6  3

If need check at least one value use any

cols = ['A', 'B']
print (df.columns.isin(cols).any())
True

cols = ['W', 'B']
print (df.columns.isin(cols).any())
True

cols = ['W', 'Z']
print (df.columns.isin(cols).any())
False

If need check all values:

cols = ['A', 'B', 'C','D','E','F']
print (df.columns.isin(cols).all())
True

cols = ['W', 'Z']
print (df.columns.isin(cols).all())
False