df.reset_index() code example
Example 1: reset_index pandas
df.reset_index(drop=True, inplace=True)
Example 2: reset index pandas
df.reset_index(drop=True)
Example 3: 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