How to convert a 13 digit unix epoch time format to date time?

Question

I'm trying to transform a data frame column containing a 13 digit unix epoch time log into human readable date-time log format.

Here's what I've tried:

alerts[date_time] = alerts['epoch'].map(lambda x: pd.to_datetime(alerts['epoch'], origin='unix', unit = 'ms'))

However, I noticed that all 43 thousand rows of my data frame had the same value despite different epoch time logs. Can someone help?

Answer 1

You are using the wrong syntax of to_datetime as part of a map.

You simply need to do:

alerts['date_time'] = pd.to_datetime(alerts['epoch'], origin='unix', unit = 'ms')