Answers for "pandas check all values in column"

show all columns and rows in pandas

pd.set_option('display.max_columns', None)
pd.set_option('display.max_rows', None)

How many columns have null values present in them? in pandas

import pandas as pd
df = pd.DataFrame({'a':[1,2,np.nan], 'b':[np.nan,1,np.nan],'c':[np.nan,2,np.nan], 'd':[np.nan,np.nan,np.nan]})
print(pd.isnull(df).sum())