Scrapy启动报错invalid syntax解决方法

作者:袖梨 2022-06-25

本篇文章小编给大家分享一下Scrapy启动报错invalid syntax解决方法,文章代码介绍的很详细,小编觉得挺不错的,现在分享给大家供大家参考,有需要的小伙伴们可以来看看。

Scrapy启动报错invalid syntax

报错信息

Traceback (most recent call last): File “d:pythonlibrunpy.py”,

line 193, in _run_module_as_main

“main”, mod_spec) File “d:pythonlibrunpy.py”, line 85, in run_code

exec(code, run_globals) File "D:pythonScriptsscrapy.exe_main.py", line 9, in File

“d:pythonlibsite-packagesscrapycmdline.py”, line 150, in execute

_run_print_help(parser, _run_command, cmd, args, opts) File “d:pythonlibsite-packagesscrapycmdline.py”, line 90, in

_run_print_help

func(*a, **kw) File “d:pythonlibsite-packagesscrapycmdline.py”, line 157, in

_run_command

cmd.run(args, opts) File “d:pythonlibsite-packagesscrapycommandscrawl.py”, line 57, in

run

self.crawler_process.crawl(spname, **opts.spargs) File “d:pythonlibsite-packagesscrapycrawler.py”, line 170, in crawl

crawler = self.create_crawler(crawler_or_spidercls) File “d:pythonlibsite-packagesscrapycrawler.py”, line 198, in

create_crawler

return self._create_crawler(crawler_or_spidercls) File “d:pythonlibsite-packagesscrapycrawler.py”, line 203, in

create_crawler

return Crawler(spidercls, self.settings) File “d:pythonlibsite-packagesscrapycrawler.py”, line 55, in init

self.extensions = ExtensionManager.from_crawler(self) File “d:pythonlibsite-packagesscrapymiddleware.py”, line 58, in

from_crawler

return cls.from_settings(crawler.settings, crawler) File “d:pythonlibsite-packagesscrapymiddleware.py”, line 34, in

from_settings

mwcls = load_object(clspath) File “d:pythonlibsite-packagesscrapyutilsmisc.py”, line 44, in

load_object

mod = import_module(module) File "d:pythonlibimportlib_init.py", line 127, in import_module

return _bootstrap._gcd_import(name[level:], package, level) File “

启动命令如下:

scrapy crawl first_spider -o first_spider.csv

解决方法

经过查询发现async在python3.7中是保留字,因此将twistedconchmanhole.py中的async修改为isasync即可解决问题

使用scrapy做爬虫遇到的一些坑

使用xpath和CSS遇到的一些 invalid syntax

1.引号的歧义:最外面应该使用单引号

错误:

正确:把定位的xpath外加单引号

2.使用了关键字做变量

错误:

正确:注意关键字不能做变量

3.进入shell窗口时,url添加了“”

错误:

正确:去掉url的引号

4.使用xpath匹配相关信息,返回为空列表

错误:因为一开始网址就是错误的,所以不管匹配的xpath是不是对的,都会返回【】

正确:

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