Pandas DataFrame tips

rolling_tips4.py

print(df.rolling(3).apply(lambda x: sum(x)-min(x)))
    num
0   NaN
1   NaN
2   3.0
3   5.0
4   7.0
5   9.0
6  11.0
7  13.0
8  15.0
9  17.0

print(df.rolling(3).agg([sum, min, lambda x: sum(x)-min(x)]))
    sum  min <lambda>
0   NaN  NaN      NaN
1   NaN  NaN      NaN
2   3.0  0.0      3.0
3   6.0  1.0      5.0
4   9.0  2.0      7.0
5  12.0  3.0      9.0
6  15.0  4.0     11.0
7  18.0  5.0     13.0
8  21.0  6.0     15.0
9  24.0  7.0     17.0