how to sample data from dataframe code example

Example: pandas create sample dataframe

>>> import pandas as pd
>>> sentence = 'The quick brown fox jumps over a lazy dog.'
>>> words = sentence.split(' ')
>>> df1 = pd.DataFrame({'key': range(len(words)),
...                     'column1_Words': words,
...                     'column2_Length': [len(x) for x in words]
...                     })
>>> df1
   key column1_Words  column2_Length
0    0           The               3
1    1         quick               5
2    2         brown               5
3    3           fox               3
4    4         jumps               5
5    5          over               4
6    6             a               1
7    7          lazy               4
8    8          dog.               4
>>>