# Source code for scrapy.extensions.statsmailer

    """
    StatsMailer extension sends an email when a spider finishes scraping.

    Use STATSMAILER_RCPTS setting to enable and give the recipient mail address
    """

    from scrapy import signals
    from scrapy.exceptions import NotConfigured
    from scrapy.mail import MailSender

    class StatsMailer:
        def __init__(self, stats, recipients, mail):
            self.stats = stats
            self.recipients = recipients
            self.mail = mail

        @classmethod
        def from_crawler(cls, crawler):
            recipients = crawler.settings.getlist("STATSMAILER_RCPTS")
            if not recipients:
                raise NotConfigured
            mail = MailSender.from_settings(crawler.settings)
            o = cls(crawler.stats, recipients, mail)
            crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)
            return o

        def spider_closed(self, spider):
            spider_stats = self.stats.get_stats(spider)
            body = "Global stats\n\n"
            body += "\n".join(f"{k:<50} : {v}" for k, v in self.stats.get_stats().items())
            body += f"\n\n{spider.name} stats\n\n"
            body += "\n".join(f"{k:<50} : {v}" for k, v in spider_stats.items())
            return self.mail.send(self.recipients, f"Scrapy stats for: {spider.name}", body)