安装Scrapy后运行命令提示ModuleNotFoundError: No module named 'win32api'

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本文记录了使用Scrapy框架启动爬虫时遇到的一个错误，该错误与第三方库win32api未找到有关。文中详细展示了从启动Scrapy到出现异常的全过程，包括使用的Scrapy及相关依赖版本。

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scrapy bench
2018-06-13 18:30:55 [scrapy.utils.log] INFO: Scrapy 1.5.0 started (bot: Test)
2018-06-13 18:30:55 [scrapy.utils.log] INFO: Versions: lxml 4.2.1.0, libxml2 2.9.5, cssselect 1.0.3, parsel 1.4.0, w3lib 1.19.0, Twisted 18.4.0, Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:04:45) [MSC v.1900 32 bit (Intel)], pyOpenSSL 18.0.0 (OpenSSL 1.1.0h
27 Mar 2018), cryptography 2.2.2, Platform Windows-8.1-6.3.9600-SP0
2018-06-13 18:30:58 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'Test', 'CLOSESPIDER_TIMEOUT': 10, 'LOGSTATS_INTERVAL': 1, 'LOG_LEVEL': 'INFO', 'NEWSPIDER_MODULE': 'Test.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['Test.spiders']}
2018-06-13 18:30:59 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.closespider.CloseSpider',
'scrapy.extensions.logstats.LogStats']
Unhandled error in Deferred:
2018-06-13 18:30:59 [twisted] CRITICAL: Unhandled error in Deferred:

2018-06-13 18:30:59 [twisted] CRITICAL:
Traceback (most recent call last):
File "c:\users\v-joesun\venv\lib\site-packages\twisted\internet\defer.py", line 1386, in _inlineCallbacks
    result = g.send(result)
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\crawler.py", line 80, in crawl
    self.engine = self._create_engine()
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\crawler.py", line 105, in _create_engine
    return ExecutionEngine(self, lambda _: self.stop())
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\core\engine.py", line 69, in __init__
    self.downloader = downloader_cls(crawler)
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\core\downloader\__init__.py", line 88, in __init__
    self.middleware = DownloaderMiddlewareManager.from_crawler(crawler)
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\middleware.py", line 58, in from_crawler
    return cls.from_settings(crawler.settings, crawler)
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\middleware.py", line 34, in from_settings
    mwcls = load_object(clspath)
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\utils\misc.py", line 44, in load_object
    mod = import_module(module)
File "c:\users\v-joesun\venv\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "c:\users\v-joesun\venv\lib\site-packages\scrapy\downloadermiddlewares\retry.py", line 20, in <module>
    from twisted.web.client import ResponseFailed
File "c:\users\v-joesun\venv\lib\site-packages\twisted\web\client.py", line 41, in <module>
    from twisted.internet.endpoints import HostnameEndpoint, wrapClientTLS
File "c:\users\v-joesun\venv\lib\site-packages\twisted\internet\endpoints.py", line 41, in <module>
    from twisted.internet.stdio import StandardIO, PipeAddress
File "c:\users\v-joesun\venv\lib\site-packages\twisted\internet\stdio.py", line 30, in <module>
    from twisted.internet import _win32stdio
File "c:\users\v-joesun\venv\lib\site-packages\twisted\internet\_win32stdio.py", line 9, in <module>
    import win32api
ModuleNotFoundError: No module named 'win32api'