# import pandas as pd
# import numpy

# df = pd.DataFrame({'x': [1, 2, 3, 4, 5,np.nan],
#  'y': [np.nan,np.nan , 1, 2, 3, 4 ],
#  'z': [1, 2, 3, 4, 5, 6]})


# from my_lambdata_johan_mazorra.my_mod import check_for_nulls