From date to timestamp in milliseconds

dt.timestamp

Sometimes you may want the date value in your dataframe to display as a timestamp. This is useful when you need to hide the date of birth (DOB) of people in your dataset while presenting the data. Below is a dataframe showing the DOB of yours truly.

shape: (1, 2)

Name	DOB
str	date
"Joram Mutenge"	2020-07-13

Convert date to timestamp

To convert a date to a timestamp, use the date component timestamp as shown below:

(df
 .with_columns(DOB_ms=pl.col('DOB').dt.timestamp('ms'))
 )

shape: (1, 3)

Name	DOB	DOB_ms
str	date	i64
"Joram Mutenge"	2020-07-13	1594598400000

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