import os

import sys

import pytransform

#-----------------------------------------------------------

#

# Part 1: check internet time by ntp server

#

#-----------------------------------------------------------

def check_expired_date_by_ntp():

from ntplib import NTPClient

from time import mktime, strptime

NTP_SERVER = 'europe.pool.ntp.org'

EXPIRED_DATE = '20190202'

print('The license will be expired on %s' % EXPIRED_DATE)

print('Check internet time from %s ...' % NTP_SERVER)

c = NTPClient()

response = c.request(NTP_SERVER, version=3)

if response.tx_time > mktime(strptime(EXPIRED_DATE, '%Y%m%d')):

print("The license has been expired")

sys.exit(1)

print("The license is not expired")

#-----------------------------------------------------------

#

# Part 2: show license information of obfuscated scripts

#

#-----------------------------------------------------------

def show_left_days_of_license():

try:

rcode = pytransform.get_license_info()['CODE']

left_days = pytransform.get_expired_days()

if left_days == -1:

print('This license for %s is never expired' % rcode)

else:

print('This license for %s will be expired in %d days' % \

(rcode, left_days))

except Exception as e:

print(e)

sys.exit(1)

#-----------------------------------------------------------

#

# Part 3: business code

#

#-----------------------------------------------------------

def hello():

print('Hello world!')

def sum2(a, b):

return a + b

def main():

hello()

print('1 + 1 = %d' % sum2(1, 1))

if __name__ == '__main__':

show_left_days_of_license()

# check_expired_date_by_ntp()

main()