convert pandas dataframe object type to string type code example
Example: pandas change dtype to string
df['id'].astype(str)
0 1
1 5
2 z
3 1
4 1
5 7
6 2
7 6
df['id'].astype(str)
0 1
1 5
2 z
3 1
4 1
5 7
6 2
7 6