randomTime_function.py

def randomtimes(start, end, n):
    """
    Generates random time stamps based on a given amount between two time periods.
    """
    # The timestamp format
    frmt = "%Y-%m-%d %H:%M:%S"
    
    # Formatting the two time periods
    stime = datetime.datetime.strptime(start, frmt)
    etime = datetime.datetime.strptime(end, frmt)
    
    # Creating the pool for random times
    td = etime - stime
    
    # Generating a list with the random times
    times = [(random.random() * td + stime).strftime(frmt) for _ in range(n)]
    
    return times

# Setting the start and end times
start = "2021-08-01 00:00:00"

end = "2021-08-24 00:00:00"

df['last_login'] = randomtimes(start, end, num_users)