filter dataframe rows based on length of column values

Question

I have a pandas dataframe as follows:

df = pd.DataFrame([ [1,2], [np.NaN,1], [\'test string1\', 5]], columns=[\'A\',\'B\'] )

df
              A  B
0                 


        

Answer 1

I had to cast to a string for Diego's answer to work:

df = df[df['A'].apply(lambda x: len(str(x)) <= 10)]