how to get a subset / diff from dict

dict_subset.py

def dict_inter(dict_in, flds):
    dict_out = {
        key: dict_in[key] for key in flds if key in dict_in.keys() 
    }
    return dict_out

def dict_diff(dict_in, flds):
    dict_out = {
        key: dict_in[key] for key in dict_in.keys() if key not in flds
    }
    return dict_out

flds = ['a', 'b', 'c']
dict_in = {'a': 1, 'b': 2, 'd': 4, 'e': 5 }

print(dict_inter(dict_in, flds))
print(dict_diff(dict_in, flds))

# {'a': 1, 'b': 2}
# {'d': 4, 'e': 5}