Python 常用模块，,time 模块imp

import timeprint(time.time())  # 时间戳print(time.mktime(time.localtime()))  # struct_time  ——> 时间戳print(time.strftime(‘%Y-%m-%d %H:%M:%S‘))  # 格式化的字符串print(time.strftime(‘%Y-%m-%d %H:%M:%S‘, time.localtime()))  # struct_time ——> Format Stringprint(time.localtime()) # 默认是当前时间print(time.localtime(1594193367))  # 时间戳 -> struct_timeprint(time.gmtime(1594193367))print(time.strptime(‘2020-07-08 15:45:18‘, ‘%Y-%m-%d %H:%M:%S‘))  # Format String  ——> struct_time‘‘‘asctime格式‘‘‘print(time.asctime())print(time.asctime(time.localtime()))print(time.ctime())print(time.ctime(time.time()))

datetime 模块

import datetime## 获取当前时间和日期now = datetime.datetime.now()print("=======================================获取当前时间和日期")print(now)print(now.strftime(‘%Y-%m-%d %H:%M:%S.%f%z‘))## 获取指定日期和时间print("=======================================获取指定日期和时间")dt = datetime.datetime(2021, 4, 19, 12, 20)print(dt)print(dt.strftime(‘%Y-%m-%d %H:%M:%S.%f%z‘))#datetime转换为timestampprint("=======================================datetime转换为timestamp")dt = datetime.datetime(2019, 4, 19, 12, 20)print(dt.timestamp())## timestamp转换为datetimeprint(‘======================timestamp转换为datetime‘)print(datetime.datetime.fromtimestamp(1618806000)) # 转换为本地时区print(datetime.datetime.utcfromtimestamp(1618806000)) #转换为UTC标准时区的时间## str转为为datatimeprint(‘======================str转为为datatime‘)dt_str = datetime.datetime.strptime(‘2015-6-1 18:19:59.497222+0000‘, ‘%Y-%m-%d %H:%M:%S.%f%z‘)print(dt_str)## datetime转换为strprint(‘======================datetime转换为str‘)print(datetime.datetime.now(datetime.timezone(datetime.timedelta(hours=8))).strftime(‘%Y-%m-%d %H:%M:%S.%f%z‘))## datetime加减print(‘==================datetime加减‘)now=datetime.datetime.now();print(now+datetime.timedelta(hours=2,days=2))print(now-datetime.timedelta(hours=2,days=2))## 获取带时区的时间## datetime表示的时间需要时区信息才能确定一个特定的时间，否则只能视为本地时间。## 如果要存储datetime，最佳方法是将其转换为timestamp再存储，因为timestamp的值与时区完全无关。tz_utc_8 = datetime.timezone(datetime.timedelta(hours=8))tz_utc_0 = datetime.timezone(datetime.timedelta(hours=0))now1 = datetime.datetime.now(tz=tz_utc_8)now2 = datetime.datetime.now(tz=tz_utc_0)print(‘==================获取带时区的时间‘)print(now1,now2)## 时区转换print(‘=================时区转换‘)## 拿到UTC时区的时间utc_dt1 = datetime.datetime.now(tz=datetime.timezone.utc)utc_dt2 = datetime.datetime.now(tz=datetime.timezone(datetime.timedelta(hours=0)))utc_dt3 = datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc)print(‘%s,%s,%s‘ % (utc_dt1, utc_dt2, utc_dt3))## 将UTC时区转换为北京时区bj_dt = utc_dt1.astimezone(datetime.timezone(datetime.timedelta(hours=8)))print(bj_dt)## astimezone()将转换北京时区为东京时间tokyo_dt1 = bj_dt.astimezone(datetime.timezone(datetime.timedelta(hours=9)))## astimezone()将转换UTC时区为东京时间tokyo_dt2 = utc_dt1.astimezone(datetime.timezone(datetime.timedelta(hours=9)))print(tokyo_dt1, tokyo_dt2)print(datetime.datetime.strptime(‘2015-1-21 9:01:30-05:00‘,‘%Y-%m-%d %H:%M:%S%z‘).timestamp())print(datetime.datetime.strptime(‘2015-6-1 08:10:30+07:00‘,‘%Y-%m-%d %H:%M:%S%z‘).timestamp())print("UTC+15:00".replace("UTC","").zfill(6))def to_timestamp(dt_str, tz_str):    tzinfo=tz_str.replace("UTC","").zfill(6)    str_date=‘%s%s‘%(dt_str,tzinfo)    return datetime.datetime.strptime(str_date,‘%Y-%m-%d %H:%M:%S%z‘).timestamp()## 测试:t1 = to_timestamp(‘2015-6-1 08:10:30‘, ‘UTC+7:00‘)assert t1 == 1433121030.0, t1t2 = to_timestamp(‘2015-5-31 16:10:30‘, ‘UTC-09:00‘)assert t2 == 1433121030.0, t2print(‘ok‘)#  参考 https://www.liaoxuefeng.com/wiki/1016959663602400/1017648783851616

Python 常用模块