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import datetime
import time
DATE_PATTERN_YMD_HMS = "%Y-%m-%d %H:%M:%S"
DATE_PATTERN_YMD = "%Y-%m-%d"
def stamp_to_datetime(stamp):
"""
将一个时间戳转化为datetime
"""
ltime = time.localtime(stamp)
time_str = time.strftime("%Y,%m,%d,%H,%M,%S", ltime).split(',')
time_int = [int(i) for i in time_str]
return datetime.datetime(*time_int)
def datetime_to_stamp(dt):
"""
将一个datetime转化为时间戳
"""
return int(time.mktime(dt.timetuple()))
def stamp_to_date_str(stamp, pattern):
"""
将一个时间戳转化为时间字符串
:return:
"""
time_array = time.localtime(stamp)
return time.strftime(pattern, time_array)
def date_str_to_stamp(date_str, pattern):
"""
将一个时间字符串转化为时间戳
:return:
"""
time_array = time.strptime(date_str, pattern)
return int(time.mktime(time_array))
def datetime_to_date_str(dt, pattern):
"""
将一个datetime转化为时间字符串
:return:
"""
return dt.strptime(pattern)
def date_str_to_datetime(date_str, pattern):
"""
将一个时间字符串转化为datetime
:return:
"""
return datetime.datetime.strptime(date_str, pattern)
def get_now_datetime():
"""
获得当前datetime
:return:
"""
return datetime.datetime.now()
def get_now_stamp():
"""
获得当前时间戳
:return:
"""
return datetime_to_stamp(get_now_datetime())
def get_now_date_str(pattern):
"""
获得当前时间字符串
:return:
"""
return datetime_to_date_str(get_now_datetime(), pattern)
def add_day(dt, days):
"""
增加x天
:param date_str:
:param day:
:return:
"""
return dt + datetime.timedelta(days=days)
def add_minute(dt, minutes):
"""
增加x分钟
:return:
"""
return dt + datetime.timedelta(minutes=minutes)
def add_second(dt, seconds):
"""
增加x秒
:return:
"""
return dt + datetime.timedelta(seconds=seconds)
def deducti_day(date_str, days):
"""
减少x天
:param date_str:
:param day:
:return:
"""
return add_day(date_str, -1*days)
def deducti_minute(date_str, minutes):
"""
减少x分钟
:return:
"""
return add_minute(date_str, -1*minutes)
def deducti_second(date_str, seconds):
"""
减少x秒
:return:
"""
return add_second(date_str, -1*seconds)
def is_expire_day(dt):
"""
是否已经过期
:return:
"""
return dt < get_now_datetime()
def is_same_day(dt1, dt2):
"""
是否是同一天
"""
return dt1.year == dt2.year and dt1.month == dt2.month and dt1.day == dt2.day
def adjust_day_start(dt):
"""
调整到一天的开始
:return:
"""
return dt.replace(hour=0, minute=0, second=0)
def adjust_day_end(dt):
"""
调整到一天的结束
:return:
"""
return dt.replace(hour=23, minute=59, second=59)
def get_time_difference_sec(dt1, dt2):
"""
返回时间差(秒)
:return:
"""
return (dt2 - dt1).seconds
def first_day_of_month():
"""
获取本月第一天
:return:
"""
return datetime.date.today() - datetime.timedelta(days=datetime.datetime.now().day - 1)
def is_weekday(dt):
"""
是否是周末,星期六(返回5)，星期天（返回6）
:return:
"""
return dt.weekday() >= 5
def is_valid_date(date_str, pattern):
"""
判断是否有效的日期格式
:return:
"""
try:
date_str_to_stamp(date_str, pattern)
except:
return False
else:
return True
def isleap(dt):
"""
判断是否是闰年
:return:
"""
return (dt.year % 4 == 0) and (dt.year % 100 != 0) or (dt.year % 400 == 0)
if __name__ == "__main__":
stamp = date_str_to_stamp("2012-12-23 23:56:59", DATE_PATTERN_YMD_HMS)
print(stamp_to_date_str(stamp, DATE_PATTERN_YMD_HMS))
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