CODEWITHSUNDEEP
pythonnumpydatetime
Inquisitor
Inquisitor

Reputation: 71

Converting numpy datetime64 to long integer and back

How to convert NumPy datetime64 to a long ineteger and back?

import numpy as np
import datetime

np.datetime64(datetime.datetime.now()).astype(long)

Gives a value of 1511975032478959

np.datetime64(np.datetime64(datetime.datetime.now()).astype(long))

Gives an error: 

ValueError: Converting an integer to a NumPy datetime requires a specified unit

Upvotes: 7

Views: 19793

Answers (3)

RogerS
RogerS

Reputation: 1451

This worked for me in Python3 (other answers seem to focus in Python2):

now = datetime.datetime.now().timestamp()
np.datetime64(int(now),'s')

2022-07-01T14:25:22

Upvotes: 0

horseshoe
horseshoe

Reputation: 1477

'us' converts to microseconds. If you require a different format use: enter image description here

as shown here

Upvotes: 4

Tim
Tim

Reputation: 2843

You need to specify the units of the long int (in this case, microseconds).

 np.datetime64(np.datetime64(datetime.datetime.now()).astype(long), 'us')

returns

 numpy.datetime64('2017-11-29T17:11:44.638713')

Upvotes: 7

Related Questions