免费计费平台特惠

import datetime

class FreeTrialReminder:
    def __init__(self, user_email, trial_start_date, trial_duration_days):
        self.user_email = user_email
        self.trial_start_date = trial_start_date
        self.trial_duration_days = trial_duration_days

    def is_trial_expired(self):
        end_date = self.trial_start_date + datetime.timedelta(days=self.trial_duration_days)
        return datetime.datetime.now() > end_date

    def send_reminder_email(self):
        if self.is_trial_expired():
            print(f"Sending email to {self.user_email} reminding them to upgrade.")
        else:
            print(f"No reminder needed for {self.user_email} yet.")

# Example usage
user_email = "example@example.com"
trial_start_date = datetime.datetime(2023, 1, 1)
trial_duration_days = 30

reminder = FreeTrialReminder(user_email, trial_start_date, trial_duration_days)
reminder.send_reminder_email()