Python基础学习之时间转换函数用法详解

import time
def time_str_to_timestamp(string_time, _format="%Y-%m-%d %H:%M:%S"):
  return int(time.mktime(time.strptime(string_time, _format)))

import time
import datetime
from pytz import timezone as tz
def time_str_to_timestamp_by_timezone(string_time, _format="%Y-%m-%d %H:%M:%S”, from_tz=“UTC”, to_tz="America/Los_Angeles"):
  from_tz = tz(from_tz)
  to_tz = tz(to_tz)
  return int(time.mktime(
    datetime.datetime.strptime(string_time, _format).replace(
      tzinfo=from_tz).astimezone(to_tz).timetuple()))

import time
def timestamp_to_str(timestamp, _format="%Y-%m-%d %H:%M:%S"):
  return time.strftime(_format, time.localtime(timestamp))

import datetime
from pytz import timezone as tz
def timestamp_to_str_by_timezone(timestamp, _format="%Y-%m-%d %H:%M:%S”, to_tz="America/Los_Angeles"):
  to_tz = tz(to_tz)
  return str(datetime.datetime.fromtimestamp(timestamp, to_tz).strftime(_format))

import datetime
def datetime_str_to_datetime(string_time, _format="%Y-%m-%d %H:%M:%S"):
  return datetime.datetime.strptime(string_time, _format)

import datetime
from pytz import timezone as tz
def datetime_str_to_datetime_by_timezone(string_time, from_tz=“UTC”, to_tz="America/Los_Angeles”, _format="%Y-%m-%d %H:%M:%S",):
  from_tz = tz(from_tz)
  to_tz = tz(to_tz)
  return datetime.datetime.strptime(string_time, _format).replace(
        tzinfo=from_tz).astimezone(to_tz)

import datetime
def datetime_to_datetime_str(date, _format="%Y-%m-%d %H:%M:%S"):
  return date.strftime(_format)

import datetime
from pytz import timezone as tz
def datetime_to_datetime_str_by_timezone(date, from_tz=“UTC”, to_tz="America/Los_Angeles”, _format="%Y-%m-%d %H:%M:%S"):
  from_tz = tz(from_tz)
  to_tz = tz(to_tz)
  date = date.replace(tzinfo=from_tz).astimezone(to_tz)
  return date.strftime(_format)

import time
def datetime_to_timestamp(date):
  return int(time.mktime(date.timetuple()))

import time
from pytz import timezone as tz
def datetime_to_timestamp_by_timezone(date, from_tz=“UTC”, to_tz="America/Los_Angeles"):
  from_tz = tz(from_tz)
  to_tz = tz(to_tz)
  return int(time.mktime(date.replace(
      tzinfo=from_tz).astimezone(to_tz).timetuple()))

import datetime
def timestamp_to_datetime(time_stamp):
  return datetime.datetime.fromtimestamp(time_stamp)

import datetime
from pytz import timezone as tz
def timestamp_to_datetime_by_timezone(time_stamp, to_tz="America/Los_Angeles"):
  to_tz = tz(to_tz)
  return datetime.datetime.fromtimestamp(time_stamp, to_tz)