Pandas DataFrame tips

rolling_basic.py

import pandas as pd

df = pd.DataFrame(range(10), columns=['num'])
print(df)
   num
0    0
1    1
2    2
3    3
4    4
5    5
6    6
7    7
8    8
9    9

print(df.rolling(3)) # Rolling object
print(type(df.rolling(3))) # This is pandas.core.window.rolling.Rolling class
Rolling [window=3,center=False,axis=0]
<class 'pandas.core.window.rolling.Rolling'>

print(df.rolling(3).sum())
    num
0   NaN
1   NaN
2   3.0
3   6.0
4   9.0
5  12.0
6  15.0
7  18.0
8  21.0
9  24.0