In [1]:

    

import datetime


    

In [2]:

    

dt = datetime.datetime.fromtimestamp(0)


    

In [3]:

    

print(dt)


    

    




1970-01-01 09:00:00

In [4]:

    

print(type(dt))


    

    




<class 'datetime.datetime'>

In [5]:

    

print(dt.tzinfo)


    

    




None

In [6]:

    

dt_utc_aware = datetime.datetime.fromtimestamp(0, datetime.timezone.utc)


    

In [7]:

    

print(dt_utc_aware)


    

    




1970-01-01 00:00:00+00:00

In [8]:

    

print(dt_utc_aware.tzinfo)


    

    




UTC

In [9]:

    

dt_jst_aware = datetime.datetime.fromtimestamp(0, datetime.timezone(datetime.timedelta(hours=9)))


    

In [10]:

    

print(dt_jst_aware)


    

    




1970-01-01 09:00:00+09:00

In [11]:

    

print(dt_jst_aware.tzinfo)


    

    




UTC+09:00

In [12]:

    

dt_utc_naive = datetime.datetime.utcfromtimestamp(0)


    

In [13]:

    

print(dt_utc_naive)


    

    




1970-01-01 00:00:00

In [14]:

    

print(dt_utc_naive.tzinfo)


    

    




None

In [15]:

    

print(dt)


    

    




1970-01-01 09:00:00

In [16]:

    

print(dt.timestamp())


    

    




0.0

In [17]:

    

print(type(dt.timestamp()))


    

    




<class 'float'>

In [18]:

    

print(dt_utc_aware)


    

    




1970-01-01 00:00:00+00:00

In [19]:

    

print(dt_utc_aware.timestamp())


    

    




0.0

In [20]:

    

print(dt_jst_aware)


    

    




1970-01-01 09:00:00+09:00

In [21]:

    

print(dt_jst_aware.timestamp())


    

    




0.0

In [22]:

    

print(dt_utc_naive)


    

    




1970-01-01 00:00:00

In [23]:

    

print(dt_utc_naive.timestamp())


    

    




-32400.0