老师，这个地址在哪里看的

老师，敲代码老是弹出来这个窗口，怎么避免

$也可以？

课上讲的是#

老师没有MI里程碑版本的

老师 Flask-restful的作用不就是开发个接口提供给用户获取数据吗，那么restful做验证的目的是什么，比如用户名和密码之类的验证，这些不应该是WTForm在后端提前验证好了，然后用户才能通过接口获得数据的吗，我一脸懵逼。还是说restful跟前端没关系只是做数据访问时的验证，那么用户怎么输入自己的用户名和密码的呢，也是要通过前端做一个Form表单吗

mybatis查询到的数据和pojo的对象是如何映射的？

也是要求表的字段名和实体类的属性名相同吗？

1、这里的实体类一定要用Integer吗？不能用int？
2、或者说：什么时候用Integer会更好一些？
3、之前的实体类里都要写上有/无构造方法，这里的为什么不需要了呢？

import scrapy


class DoubanSpider(scrapy.Spider):
    name = 'douban'
    allowed_domains = ['douban.com']
    start_urls = ['https://movie.douban.com/top250?start=50&filter=']

    def parse(self, response):
        names = response.xpath('//div[@class="hd"]/a/span[1]/text()').getall()
        scores = response.xpath('//span[@class="rating_num"]/text()').extract()

        # 保存数据
        for name,score in zip(names,scores):
            yield {
                'name':name,
                'score':score
            }

老师，我这个为什么生成器生成不了

终端代码是这个

(spider_env) D:\Pycharm开发环境\scrapy04\scrapy04>scrapy crawl douban2 -o douban2.json -t json

D:\Python_env\spider_env\lib\site-packages\scrapy\commands\__init__.py:131: ScrapyDeprecationWarning: The -t command line option is deprecated i

n favor of specifying the output format within the output URI. See the documentation of the -o and -O options for more information.

  feeds = feed_process_params_from_cli(

D:\Python_env\spider_env\lib\site-packages\scrapy\spiderloader.py:37: UserWarning: There are several spiders with the same name:

  DoubanSpider named 'douban' (in scrapy04.spiders.douban)

  DoubanSpider named 'douban' (in scrapy04.spiders.douban2)

  This can cause unexpected behavior.

  warnings.warn(

2022-09-23 10:17:11 [scrapy.utils.log] INFO: Scrapy 2.6.2 started (bot: scrapy04)

2022-09-23 10:17:11 [scrapy.utils.log] INFO: Versions: lxml 4.9.1.0, libxml2 2.9.12, cssselect 1.1.0, parsel 1.6.0, w3lib 2.0.1, Twisted 22.8.0,

 Python 3.9.7 (tags/v3.9.7:1016ef3, Aug 30 2021, 20:19:38) [MSC v.1929 64 bit (AMD64)], pyOpenSSL 22.0.0 (OpenSSL 3.0.5 5 Jul 2022), cryptograph

y 38.0.1, Platform Windows-10-10.0.22000-SP0

Traceback (most recent call last):

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\spiderloader.py", line 75, in load

    return self._spiders[spider_name]

KeyError: 'douban2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "D:\Program Files\Python39\lib\runpy.py", line 197, in _run_module_as_main

    return _run_code(code, main_globals, None,

  File "D:\Program Files\Python39\lib\runpy.py", line 87, in _run_code

    exec(code, run_globals)

  File "D:\Python_env\spider_env\Scripts\scrapy.exe\__main__.py", line 7, in <module>

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\cmdline.py", line 154, in execute

    _run_print_help(parser, _run_command, cmd, args, opts)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\cmdline.py", line 109, in _run_print_help

    func(*a, **kw)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\cmdline.py", line 162, in _run_command

    cmd.run(args, opts)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\commands\crawl.py", line 22, in run

    crawl_defer = self.crawler_process.crawl(spname, **opts.spargs)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\crawler.py", line 204, in crawl

    crawler = self.create_crawler(crawler_or_spidercls)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\crawler.py", line 237, in create_crawler

    return self._create_crawler(crawler_or_spidercls)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\crawler.py", line 312, in _create_crawler

    spidercls = self.spider_loader.load(spidercls)

  File "D:\Python_env\spider_env\lib\site-packages\scrapy\spiderloader.py", line 77, in load

    raise KeyError(f"Spider not found: {spider_name}")

KeyError: 'Spider not found: douban2'

不懂为啥，整型之间也可以用逻辑运算符。

我们之前消费信息用的

setMessageListener为什么不用要用registerMessageListener
而且为什么用MessageListenerConcurrently
不用MessageListenerOrderly，区别在哪里

ping mysql 不行呢？更新一下也不行

这个异步发送和上次的同步发送代码区别在哪里，哪里不同，没看出来

如图，老师，它这里数据库的表名为什么是？不是userapp_UserInfo?不是很明白

做一个人见人爱的好程序猿，我决定跟高总混了！