Generate Rfc 3339 Timestamp in Python

Convert an RFC 3339 time to a standard Python timestamp

No builtin, afaik.

feed.date.rfc3339
This is a Python library module with functions for converting timestamp strings in RFC 3339 format to Python time float values, and vice versa. RFC 3339 is the timestamp format used by the Atom feed syndication format.

It is BSD-licensed.

http://home.blarg.net/~steveha/pyfeed.html

(Edited so it's clear I didn't write it. :-)

Getting the RFC 3339 timestamp for a day ago

You can get one day previous to x with:

x = x + datetime.timedelta(days = -1)

The following transcript shows this in action:

pax> python
Python 2.7.3 (default, Jan  2 2013, 16:53:07) 
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> import datetime
>>> d = datetime.datetime.utcnow()
>>> d
datetime.datetime(2014, 2, 26, 1, 11, 1, 536396)

>>> print d.isoformat("T") + "Z"
2014-02-26T01:11:01.536396Z

>>> d = d + datetime.timedelta(days=-1)
>>> d
datetime.datetime(2014, 2, 25, 1, 11, 1, 536396)

>>> print d.isoformat("T") + "Z"
2014-02-25T01:11:01.536396Z

Python and RFC 3339 timestamps

This was based on the examples on page 10 of the RFC. The only difference is that I am showing a microseconds value of six digits, conformant to Google Drive's timestamps.

from math import floor

def build_rfc3339_phrase(datetime_obj):
    datetime_phrase = datetime_obj.strftime('%Y-%m-%dT%H:%M:%S')
    us = datetime_obj.strftime('%f')

    seconds = datetime_obj.utcoffset().total_seconds()

    if seconds is None:
        datetime_phrase += 'Z'
    else:
        # Append: decimal, 6-digit uS, -/+, hours, minutes
        datetime_phrase += ('.%.6s%s%02d:%02d' % (
                            us,
                            ('-' if seconds < 0 else '+'),
                            abs(int(floor(seconds / 3600))),
                            abs(seconds % 3600)
                            ))

    return datetime_phrase

convert list of string to ISO 8601/RFC 3339 format

Based on that error message, you've probably done import rfc3339, not from rfc3339 import rfc3339. You can't call the module (as it's telling you).

That said, if all your strings are of the format YYYY-MM-DDTHH:mm:ss and you want YYYY-MM-DDTHH:mm:ssZ, why not just...

z_dates = [date + "Z" for date in start_date]

Converting TZ time to string

Try this:

from dateutil import parser
from datetime import datetime

datetime_obj = parser.parse(saved_data['created_at'])
readable = datetime.strftime(datetime_obj,'%Y-%m-%d %H:%M:%S')

print (readable)

Python datetime parse timezone (RFC3339)

You could use dateutil, however, if you are using Python 3 it only works for 3.2 or 3.3. It also supports Python 2 on 2.6 and 2.7.

The solution I would suggest:

from dateutil.parser import parse

string = "2016-01-29T20:00:00+01:00"

date = parse(string)

This will give you a datetime object like so:

Out[1]: 2016-01-29 20:00:00+01:00
Out[2]: datetime.datetime(2016, 1, 29, 20, 0, tzinfo=tzoffset(None, 3600))

If you'd like to know more, check dateutil documentation.

Moreover, I believe the reason strptime doesn't work straight away here is due to that 'T' on your date string. It's not the format strptime expects. Luckily dateutil parse method works right out of the box to fix that string for you.

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