convert numpy datetime to pandas timestamp code example

Example 1: pandas change dtype to timestamp

pd.to_datetime(df.column)

Example 2: pandas datetime to unix timestamp

dates = pd.to_datetime(['2019-01-15 13:30:00'])
(dates - pd.Timestamp("1970-01-01")) // pd.Timedelta('1s')  
# Int64Index([1547559000], dtype='int64')