from?datetime?import?datetime
from?urllib.request?import?urlopen
import?time
import?ssl
import?sys

ssl._create_default_https_context?=?ssl._create_unverified_context


def?get_network_time():
????url?=?"https://www.baidu.com"
????try:
????????with?urlopen(url)?as?res:
????????????utctime?=?gmtstr_to_localtime(res.getheader("Date"))
????????????return?datetime_from_utc_to_local(utctime)
????except?Exception?as?e:
????????print("請(qǐng)檢查網(wǎng)絡(luò)設(shè)置")
????????sys.exit()


def?gmtstr_to_localtime(gmtstr)?->?datetime:
????return?datetime.strptime(gmtstr,?"%a,?%d?%b?%Y?%H:%M:%S?GMT")


def?datetime_from_utc_to_local(utc_datetime):
????now_timestamp?=?time.time()
????offset?=?datetime.fromtimestamp(now_timestamp)?-?datetime.utcfromtimestamp(
????????now_timestamp
????)
????return?utc_datetime?+?offset


if?__name__?==?"__main__":
????print(get_network_time())
????#?Output:
????#?2022-07-19?06:39:12

def?lock():
????now?=?get_network_time()
????end_date?=?datetime(2022,?8,?26)
????if?now?>?end_date:
????????print("試用已到期")
????????sys.exit()

from?lock?import?lock

def?somefunc():
????lock()
????#?do?your?work

from?core_work?import?main
main()

from?distutils.core?import?setup
from?Cython.Build?import?cythonize
files?=?["lock.py",?"core_work.py"]

setup(
????name="yourapp",
????ext_modules=cythonize(files),
????script_args=["build_ext",?"-b",?"./build",?"-t",?"./build/temp"],
)