如何停用许可证

class LicenseManager:
    def __init__(self):
        self.licenses = {}

    def add_license(self, license_key, user_id):
        if license_key not in self.licenses:
            self.licenses[license_key] = {'user_id': user_id, 'active': True}
            print(f"License {license_key} added for user {user_id}")
        else:
            print(f"License {license_key} already exists")

    def deactivate_license(self, license_key):
        if license_key in self.licenses and self.licenses[license_key]['active']:
            self.licenses[license_key]['active'] = False
            print(f"License {license_key} deactivated")
        else:
            print(f"License {license_key} is already inactive or does not exist")

    def check_license(self, license_key):
        if license_key in self.licenses:
            status = "Active" if self.licenses[license_key]['active'] else "Inactive"
            print(f"License {license_key} is {status}")
        else:
            print(f"License {license_key} does not exist")

# 示例使用
manager = LicenseManager()
manager.add_license("ABC123", "user1")
manager.check_license("ABC123")
manager.deactivate_license("ABC123")
manager.check_license("ABC123")