Parsing Python to Golang - DateTime

Question

I've been attempting to get a specific string output from pyhtons datetime (2006-01-02T15:04:05.000Z), so that I can easily parse it in golang using time.Parse.

I tried (in python)

datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S.%fZ')

Which will give me something like this: "2018-11-06T22:48:50.002750Z"

And when I try to parse it like this in Golang:

dtLayout := "2006-01-02T15:04:05.000Z"
dateStr := "2018-11-06T22:48:50.002750Z"

parsedDate, err := time.Parse(dtLayout, dateStr)
if err != nil {
    if err != nil {
        log.Printf("error: %v", err)
    }

I get this error:

2018/11/06 16:49:11 error: parsing time "2018-11-06T22:48:50.002750Z" as "2006-01-02T15:04:05.000Z": cannot parse "750Z" as "Z"

There's probably an easy way to do this using just milliseconds, but I'm stubborn and feel like I'm close.

Mr_Pink · Accepted Answer · 2018-11-06 23:09:09Z

5

Zeros in the fractional seconds must match the number of characters exactly, and as your error states, the portion after 750Z doesn't match the corresponding portion of the format string.

You can add the correct number of zeros, like "2006-01-02T15:04:05.000000Z", or use 9 as a more flexible format.

dtLayout := "2006-01-02T15:04:05.9Z"

https://play.golang.org/p/dyC0OXUnhhu

answered Nov 6, 2018 at 23:09

Mr_Pink

110k17 gold badges287 silver badges275 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

M.Traynor Over a year ago

The 9! That's the kind if solution I was looking for. Thank you so much, that works perfectly and doesn't feel too dirty :D

Collectives™ on Stack Overflow

Parsing Python to Golang - DateTime

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related