pandas range that resets after column value changes code example
Example: reset_index(drop=true)
In [194]: df.reset_index(drop=True)
Out[194]:
_worker_id foo
0 A 1
1 B 2
2 C 3
In [194]: df.reset_index(drop=True)
Out[194]:
_worker_id foo
0 A 1
1 B 2
2 C 3