i loc and loc python' code example
Example 1: iloc python
>>> df.iloc[[0, 1]]
a b c d
0 1 2 3 4
1 100 200 300 400
Example 2: dataframe loc change values
%timeit df.at['Bill', 'language'] = 'Python'
>>> df.iloc[[0, 1]]
a b c d
0 1 2 3 4
1 100 200 300 400
%timeit df.at['Bill', 'language'] = 'Python'