无法在 Windows 10 64 位的 venv 中安装 python 3.8.1 scrapy

Question

我尝试使用pip install scrapy 和pip3 install scrapy 在我的Windows 机器上安装scrapy，但它显示以下错误：

      File "<string>", line 1, in <module>
      File "C:\Users\ASUS\AppData\Local\Temp\pip-install-8lbz4g3u\Twisted\setup.py", line 20, in <module>
        setuptools.setup(**_setup["getSetupArgs"]())
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\__init__.py", line 144, in setup
        _install_setup_requires(attrs)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\__init__.py", line 139, in _install_setup_requires
        dist.fetch_build_eggs(dist.setup_requires)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\dist.py", line 716, in fetch_build_eggs
        resolved_dists = pkg_resources.working_set.resolve(
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\pkg_resources\__init__.py", line 780, in resolve
        dist = best[req.key] = env.best_match(
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\pkg_resources\__init__.py", line 1065, in best_match
        return self.obtain(req, installer)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\pkg_resources\__init__.py", line 1077, in obtain
        return installer(requirement)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\dist.py", line 786, in fetch_build_egg
        return cmd.easy_install(req)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\command\easy_install.py", line 665, in easy_install
        dist = self.package_index.fetch_distribution(
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 655, in fetch_distribution
        dist = find(requirement)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 635, in find
        loc = self.download(dist.location, tmpdir)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 579, in download
        found = self._download_url(scheme.group(1), spec, tmpdir)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 824, in _download_url
        return self._attempt_download(url, filename)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 830, in _attempt_download
        headers = self._download_to(url, filename)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 729, in _download_to
        fp = self.open_url(url)
      File "c:\users\asus\desktop\utube\venv\lib\site-packages\setuptools\package_index.py", line 779, in open_url
        raise DistutilsError("Download error for %s: %s"
    distutils.errors.DistutilsError: Download error for https://files.pythonhosted.org/packages/f5/1d/c98a587dc06e107115cf4a58b49de20b19222c83d7533
5a192052af4c4b7/incremental-17.5.0-py2.py3-none-any.whl#sha256=717e12246dddf231a349175f48d74d93e2897244939173b01974ab6661406b9f: _ssl.c:1091: The h
andshake operation timed out
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

所以请帮我看看如何解决这个问题。

我也尝试从 pycharm 安装，但它也无法在那里安装

Answer 1

根据您提供的回溯和Github Issue，问题似乎是“增量”包依赖项。在安装 scrapy 之前，您可以尝试使用 pip install incremental==17.5.0 安装增量（17.5.0）。

请注意，在scrapy 文档installation guide 中它说：

“虽然可以使用 pip 在 Windows 上安装 Scrapy，但我们 建议您安装 Anaconda 或 Miniconda 并使用该软件包 来自 conda-forge 频道，这将避免大多数安装 问题。”

因此，如果安装增量无法解决您的问题，您可以按照文档中的步骤进行操作。