how to find the standard deviation in python code example

Example 1: python standard deviation

import numpy as np
dataset=[13, 22, 26, 38, 36, 42,49, 50, 77, 81, 98, 110]
print('Standard Deviation:', np.std(dataset))

Standard Deviation: 29.694275542602483

Example 2: python running standard deviation

import panda as pd
df = pd.DataFrame(data)
window=5
running_vol=df['x'].rolling(window).std()