Question

例如：我有一个日期字符串

2018-02-17 16:15:36.519 PST

我如何转换成UTC中的isoformat，如下所示

2018-02-18T00:15:36.519Z

我试过这个

from dateutil.parser import parse
d1='2018-02-17 16:15:36.519 PST'
print parse(d1)
it prints like this.  How do i convert it to UTC with Z at the end.
2018-02-17 16:15:36.519000-08:00

修改使用python 2.7。

import dateutil
import pytz
from dateutil.parser import parse
d1='2018-02-17 16:15:36.519 PST'
d2=dateutil.parser.parse(d1)
d2.replace(tzinfo=pytz.utc) - d2.utcoffset()
d3=(d2.replace(tzinfo=pytz.utc) - d2.utcoffset()).isoformat()
print d3

然后根据建议用Z格式化

Answer 1

将时区缩写（PST）解析为时区感知日期时间对象：

import dateparser  # pip install dateparser

pst_dt = dateparser.parse('2018-02-17 16:15:36.519 PST')
# -> datetime.datetime(2018, 2, 17, 16, 15, 36, 519000, tzinfo=<StaticTzInfo 'PST'>)

将时间转换为UTC时区：

import datetime as DT

utc_dt = pst_dt.astimezone(DT.timezone.utc)
# -> datetime.datetime(2018, 2, 18, 0, 15, 36, 519000, tzinfo=datetime.timezone.utc)

以所需格式打印：

print(utc_dt.isoformat())  # -> 2018-02-18T00:15:36.519000+00:00
print(utc_dt.strftime('%Y-%m-%dT%H:%M:%S.%fZ'))  # -> 2018-02-18T00:15:36.519000Z

在Python 2.7上没有DT.timezone.utc：

utc_naive = psd_dt.replace(tzinfo=None) - psd_dt.utcoffset()
print utc_naive.strftime('%Y-%m-%dT%H:%M:%S.%fZ')
# -> 2018-02-18T00:15:36.519000Z

注意：在一般情况下，时区缩写（例如PST）可能不明确。见Parsing date/time string with timezone abbreviated name in Python?

在您的特定情况下，时间字符串对应于唯一的UTC时间：

>>> from collections import defaultdict
>>> import datetime as DT
>>> import pytz
>>> naive_dt, tzabbr = DT.datetime(2018, 2, 17, 16, 15, 36, 519000), 'PST'
>>> utc_times = defaultdict(list)
>>> for zone in pytz.all_timezones:
...     dt = pytz.timezone(zone).localize(naive_dt, is_dst=None)
...     if dt.tzname() == tzabbr: # same timezone abbreviation
...         utc_times[dt.astimezone(pytz.utc)].append(zone)
>>> for utc_dt, timezones in utc_times.items():
...     print(f'{utc_dt:%c %Z}', *timezones, sep='\n\t')
Sun Feb 18 00:15:36 2018 UTC
        America/Dawson
        America/Ensenada
        America/Los_Angeles
        America/Santa_Isabel
        America/Tijuana
        America/Vancouver
        America/Whitehorse
        Canada/Pacific
        Canada/Yukon
        Mexico/BajaNorte
        PST8PDT
        US/Pacific
        US/Pacific-New

请参阅linux convert time(for different timezones) to UTC

Answer 2

这是python2.7的演示代码，仅供参考，

import { Component, Inject } from "@angular/core";
import { ModalController } from "@ionic/angular";
import { WorkspacesComponent } from "../workspaces/workspaces.component";
import { Workspace } from "../models/workspace.model";

@Component({
  selector: "app-workspace-modal",
  templateUrl: "./workspace-modal.component.html",
  styles: [],
})
export class WorkspaceModalComponent {
  constructor(public modalController: ModalController, public data: any) {}

  /**
   * CLOSE THE MODAL ON CLICK
   */
  async closeWorkspaceModal() {
    await this.modalController.dismiss();
  }
}

python将PST时间转换为UTC isoformat

2 个答案: