如何将当前格式化时间从多个时区导出到文本文件

Question

我没有多少 Python 编程经验，但需要将当前时间以某种 12 小时格式从几个不同的时区导出到单个文本文件中。我找到了几种解决方案，但需要将所有三个组件集成到一个解决方案中。

from datetime import datetime
"{:%A, %B %d %Y %I:%M:%S %p %Z}".format(datetime.now())

import datetime
import pytz
my_date = datetime.datetime.now(pytz.timezone('UTC'))
print(my_date)
my_date = datetime.datetime.now(pytz.timezone('America/New_York'))
print(my_date)
my_date = datetime.datetime.now(pytz.timezone('EST'))
print(my_date)
my_date = datetime.datetime.now(pytz.timezone('Pacific/Port_Moresby'))
print(my_date)

import datetime
open("C:\temp\current_time.txt", "w").write("UTC Time: ")
open("C:\temp\current_time.txt", "a").write(datetime.datetime.now().ctime()+ '\n')
open("C:\temp\current_time.txt", "a").write("EST Time: ")
open("C:\temp\current_time.txt", "a").write(datetime.datetime.now().ctime()+ '\n')
open("C:\temp\current_time.txt", "a").write("New York Time: ")
open("C:\temp\current_time.txt", "a").write(datetime.datetime.now().ctime()+ '\n')
open("C:\temp\current_time.txt", "a").write("Port Moresby Time: ")
open("C:\temp\current_time.txt", "a").write(datetime.datetime.now().ctime())

最后一个序列似乎在 Python 3.7 中不起作用，但如果可能的话，希望它使用（不幸的是）Python 2.7 安装来工作。

最终，我想要这些结果：

UTC Time: Monday, October 11, 2021 09:05:17
EST Time: Monday, October 11, 2021 04:05:17 AM
New York Time: Monday, October 11, 2021 05:05:17 AM
Port Moresby Time: Monday, October 11, 2021 07:05:17 PM

非常感谢您的帮助。

Answer 1

您的代码有几个问题：

1. 您正在调用datetime.datetime.now 四次，这将为您提供执行这些语句时的日期时间，即您将获得四个不同时刻的日期时间。您只需获取当前时刻的日期时间一次，然后将其转换为所需时区中相应的日期时间。
2. 我建议您使用with open(...) as variable 块，它可以让您的代码在退出块后自动关闭文件。

使用 Python 3.9 测试的工作代码：

from datetime import datetime
import pytz

now = datetime.now()

now_utc = now.astimezone(pytz.timezone('UTC'))
now_est = now.astimezone(pytz.timezone('EST'))
now_new_york = now.astimezone(pytz.timezone('America/New_York'))
now_port_moresby = now.astimezone(pytz.timezone('Pacific/Port_Moresby'))

format = "%A, %B %d, %Y %I:%M:%S %p"

with open("current_time.txt", "w") as file:
    file.write(f'UTC Time: {now_utc.strftime(format)}\n')
    file.write(f'EST Time: {now_est.strftime(format)}\n')
    file.write(f'New York Time: {now_new_york.strftime(format)}\n')
    file.write(f'Port Moresby Time: {now_port_moresby.strftime(format)}\n')

样本运行中写入 current_time.txt 的数据：

UTC Time: Monday, October 11, 2021 12:25:50 PM
EST Time: Monday, October 11, 2021 07:25:50 AM
New York Time: Monday, October 11, 2021 08:25:50 AM
Port Moresby Time: Monday, October 11, 2021 10:25:50 PM

使用 Python 2.7 测试的工作代码：

from datetime import datetime
import pytz

now_utc = datetime.utcnow()

tz_utc = pytz.timezone('UTC')

now_est = tz_utc.localize(now_utc).astimezone(pytz.timezone('EST'))
now_new_york = tz_utc.localize(now_utc).astimezone(pytz.timezone('America/New_York'))
now_port_moresby = tz_utc.localize(now_utc).astimezone(pytz.timezone('Pacific/Port_Moresby'))

format = "%A, %B %d, %Y %I:%M:%S %p"

with open("current_time.txt", "w") as file:
    file.write('UTC Time: ' + now_utc.strftime(format) + '\n')
    file.write('EST Time: ' + now_est.strftime(format) + '\n')
    file.write('New York Time: '+ now_new_york.strftime(format) + '\n')
    file.write('Port Moresby Time: ' + now_port_moresby.strftime(format) + '\n')