```python
import datetime
# 当前日期和时间
print(datetime.datetime.now())
# 2019-09-30 22:19:37.582514
# 获取指定时间
datetest = datetime.datetime(2019, 9, 30, 22, 22, 0)
print(datetest)
# 2019-09-30 22:22:00
# 获取日期的年月日时分秒
print(str(datetest.year) + "-" + str(datetest.month) + "-" + str(datetest.day) + " " + str(datetest.hour) + ":" + str(
datetest.minute) + ":" + str(datetest.second))
# 2019-9-30 22:22:0
import datetime, time
dt1 = datetime.datetime.fromtimestamp(10000)
dt2 = datetime.datetime.fromtimestamp(time.time())
print(dt1)
print(dt2)
# 1970-01-01 10:46:40
# 2019-09-30 23:28:47.629210
import datetime
# 日期转换
datestr = datetime.datetime.strptime('2019-9-30 22:10:00', '%Y-%m-%d %H:%M:%S')
now = datetime.datetime.now()
print(datestr)
print(now.strftime('%a, %b %d %H:%M'))
print(time.strftime('%Y-%m-%d'))
# 2019-09-30 22:10:00
# Tue, Oct 01 00:02
import datetime
# 日期增加和减少
now = datetime.datetime.now()
print(now)
newdate = now + datetime.timedelta(hours=10)
print(newdate)
newdate = now - datetime.timedelta(days=1)
print(newdate)
# 2019-10-01 00:23:50.152118
# 2019-10-01 10:23:50.152118
# 2019-09-30 00:23:50.152118
```
