pynamodb_test_date.py

from datetime import datetime

import pytz
import dateutil.tz
from pynamodb.models import Model
from pynamodb.attributes import NumberAttribute, UTCDateTimeAttribute

class MyModel(Model):
    class Meta:
        table_name = 'my_model'
        read_capacity_units = 10
        write_capacity_units = 10
        host = "http://localhost:8000"

    k = NumberAttribute(hash_key=True)
    t = UTCDateTimeAttribute()

MyModel.create_table()


m1 = MyModel()
m1.k = 123
m1.t = datetime.utcnow()
print(m1.t, m1.t.tzinfo)
m1.save()

m2 = MyModel.get(123)
print(m2.t, m2.t.tzinfo)
m2.t = datetime.utcnow().replace(tzinfo=pytz.utc)
m2.save()

m3 = MyModel.get(123)
print(m3.t, m3.t.tzinfo)
m3.t = datetime.now().replace(tzinfo=dateutil.tz.tzlocal())
print(m3.t, m3.t.tzinfo)
m3.save()

m4 = MyModel.get(123)
print(m4.t, m4.t.tzinfo)