from datetime import datetime

def now_date():

return datetime.now()

def now_year():

return datetime.now().year

def now_str():

return datetime.now().strftime('%Y-%m-%d %H:%M:%S')

def date_to_str(date_time):

return date_time.strftime('%Y-%m-%d %H:%M:%S')

def str_to_date(str_time):

return datetime.strptime(str_time, '%Y-%m-%d %H:%M:%S')

def str_to_date_with_format(str_time, str_format):

return datetime.strptime(str_time, str_format)

def timestamp_to_datetime(timestamp):

if len(str(timestamp)) == 13:

timestamp = timestamp / 1000 # 毫秒时间戳转秒

return datetime.fromtimestamp(timestamp)