how to add 30 minutes in datetime column in pandas
df['time'] = pd.to_datetime(df['time'].astype(str)) + pd.DateOffset(hours=5, minutes=30)
print(df['time'].head())
0 2018-12-24 10:20:00
1 2018-12-24 10:20:00
2 2018-12-24 10:30:00
3 2018-12-24 10:42:00
4 2018-12-24 11:34:00
Name: 1, dtype: datetime64[ns]