ENH: add ignore_index argument to DataFrame.explode / Series.explode #34932
Description
When we use DataFrame.explode right now, it will repeat the index for each element in the iterator. To keep it consistent with the methods like DataFrame.sort_values, DataFrame.append and pd.concat, we can add an argument ignore_index, which will reset the index.
df = pd.DataFrame({'id':range(0,30,10),
'values':[list('abc'), list('def'), list('ghi')]})
print(df)
id values
0 0 [a, b, c]
1 10 [d, e, f]
2 20 [g, h, i]
print(df.explode('values'))
id values
0 0 a
0 0 b
0 0 c
1 10 d
1 10 e
1 10 f
2 20 g
2 20 h
2 20 iExpected behaviour with addition of the argument:
df.explode('values', ignore_index=True)
id values
0 0 a
1 0 b
2 0 c
3 10 d
4 10 e
5 10 f
6 20 g
7 20 h
8 20 i