If I slice a dataframe with something like
>>> df = pd.DataFrame(data=[[x] for x in [1,2,3,5,1,3,2,1,1,4,5,6]], columns=['A'])
>>> df.loc[df['A'] == 1]
# or
>>> df[df['A'] == 1]
A
0 1
4 1
7 1
8 1
how could I pad my selections by a buffer of 1 and get the each of the indices 0, 1, 3, 4, 5, 6, 7, 8, 9
? I want to select all rows for which the value in column 'A'
is 1, but also a row before or after any such row.
edit I'm hoping to figure out a solution that works for arbitrary pad sizes, rather than just for a pad size of 1.
edit 2 here's another example illustrating what I'm going for
df = pd.DataFrame(data=[[x] for x in [1,2,3,5,3,2,1,1,4,5,6,0,0,3,1,2,4,5]], columns=['A'])
and we're looking for pad == 2
. In this case I'd be trying to fetch rows 0, 1, 2, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16
.