pandasdatetime.py

import pandas as pd
#Convert timedelta to number of seconds
td = pd.to_timedelta ("22 days 04:37:08")
print(td," is ",(td / np.timedelta64(1, 's')).astype(int)," seconds")

#Convert seconds to hh:mm:ss
sec = 63914
print(sec, " seconds is " ,pd.to_timedelta(sec, unit='s'))

#difference between two dates in seconds
a = pd.Timestamp('2015-09-22 01:20:44.551')
b = pd.Timestamp('2015-09-22 02:55:15.649')
print((b-a).seconds)

#difference
a = pd.Timestamp('02:30:10.917 18-09-2015')
b = pd.Timestamp('02:35:57.573 18-09-2015')
print((b-a).seconds)