pd.set_option('display.precision', 2)
sample_df_2.describe()

"""
Explanation: descriptive statistics
End of explanation
"""


s = pd.Series(['A', 'B', 'C', 'Aaba', 'Baca', np.nan, 'CABA', 'dog', 'cat'])
s.str.lower()

"""
Explanation: column mean
row mean
documentation: http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.mean.html
apply (a function to a data frame)
documentation: http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.apply.html
string methods
documentation: http://pandas.pydata.org/pandas-docs/stable/text.html
End of explanation
"""


