<human>:  test a datetime object.
<bot>: Here is a Python code to test a datetime object

import datetime

def is_valid_datetime(dt):
  """
  >>> is_valid_datetime(datetime.datetime(2019, 1, 1, 1, 1, 1))
  True
  >>> is_valid_datetime(datetime.datetime(2019, 1, 1, 1, 1, 1, 1))
  False
  """
  return dt.tzinfo is not None

# Enter the datetime object
dt = datetime.datetime(2019, 1, 1, 1, 1, 1)

# Calling the function
print((is_valid_datetime(dt)))

#Example Output
# False

#Remember to inspect code for bugs.