错误安装烧瓶在windows下virutalenv – 系统找不到指定的文件

我在窗口框中使用python 2.7。我可以使用pip install来安装烧瓶，如下所示：

然而，在我创build一个virtualenv之后，我试图做同样的事情时得到了错误。

脚本：

$pip install virtualenv $cd /dd: $mkdir test $cd test $virtualenv flaskEnv $cd flaskEnv/Scritps/ $activate $cd ../../ $pip install flask

日志文件如下：

 Collecting flask Using cached Flask-0.11.1-py2.py3-none-any.whl Requirement already satisfied (use --upgrade to upgrade): click>=2.0 in c:\projects\flask-react\flsk\lib\site-packages (from flask) Requirement already satisfied (use --upgrade to upgrade): Werkzeug>=0.7 in c:\projects\flask-react\flsk\lib\site-packages (from flask) Collecting Jinja2>=2.4 (from flask) Using cached Jinja2-2.8-py2.py3-none-any.whl Collecting itsdangerous>=0.21 (from flask) Collecting MarkupSafe (from Jinja2>=2.4->flask) Using cached MarkupSafe-0.23.tar.gz Building wheels for collected packages: MarkupSafe Running setup.py bdist_wheel for MarkupSafe: started Running setup.py bdist_wheel for MarkupSafe: finished with status 'error' Complete output from command c:\projects\flask-react\flsk\scripts\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\admini~1\\appdata\\local\\temp\\pip-build-3ep417\\MarkupSafe\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -dc:\users\admini~1\appdata\local\temp\tmp8mkr70pip-wheel- --python-tag cp27: running bdist_wheel running build running build_py creating build creating build\lib.win32-2.7 creating build\lib.win32-2.7\markupsafe copying markupsafe\tests.py -> build\lib.win32-2.7\markupsafe copying markupsafe\_compat.py -> build\lib.win32-2.7\markupsafe copying markupsafe\_constants.py -> build\lib.win32-2.7\markupsafe copying markupsafe\_native.py -> build\lib.win32-2.7\markupsafe copying markupsafe\__init__.py -> build\lib.win32-2.7\markupsafe running egg_info writing MarkupSafe.egg-info\PKG-INFO writing top-level names to MarkupSafe.egg-info\top_level.txt writing dependency_links to MarkupSafe.egg-info\dependency_links.txt warning: manifest_maker: standard file '-c' not found reading manifest file 'MarkupSafe.egg-info\SOURCES.txt' reading manifest template 'MANIFEST.in' writing manifest file 'MarkupSafe.egg-info\SOURCES.txt' copying markupsafe\_speedups.c -> build\lib.win32-2.7\markupsafe running build_ext building 'markupsafe._speedups' extension error: [Error 2] The system cannot find the file specified ---------------------------------------- Running setup.py clean for MarkupSafe Failed to build MarkupSafe Installing collected packages: MarkupSafe, Jinja2, itsdangerous, flask Running setup.py install for MarkupSafe: started Running setup.py install for MarkupSafe: finished with status 'error' Complete output from command c:\projects\flask-react\flsk\scripts\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\admini~1\\appdata\\local\\temp\\pip-build-3ep417\\MarkupSafe\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record c:\users\admini~1\appdata\local\temp\pip-8v3_ep-record\install-record.txt --single-version-externally-managed --compile --install-headers c:\projects\flask-react\flsk\include\site\python2.7\MarkupSafe: running install running build running build_py creating build creating build\lib.win32-2.7 creating build\lib.win32-2.7\markupsafe copying markupsafe\tests.py -> build\lib.win32-2.7\markupsafe copying markupsafe\_compat.py -> build\lib.win32-2.7\markupsafe copying markupsafe\_constants.py -> build\lib.win32-2.7\markupsafe copying markupsafe\_native.py -> build\lib.win32-2.7\markupsafe copying markupsafe\__init__.py -> build\lib.win32-2.7\markupsafe running egg_info writing MarkupSafe.egg-info\PKG-INFO writing top-level names to MarkupSafe.egg-info\top_level.txt writing dependency_links to MarkupSafe.egg-info\dependency_links.txt warning: manifest_maker: standard file '-c' not found reading manifest file 'MarkupSafe.egg-info\SOURCES.txt' reading manifest template 'MANIFEST.in' writing manifest file 'MarkupSafe.egg-info\SOURCES.txt' copying markupsafe\_speedups.c -> build\lib.win32-2.7\markupsafe running build_ext building 'markupsafe._speedups' extension error: [Error 2] The system cannot find the file specified

错误信息是否对任何人有意义？谢谢

这个问题似乎与在virtualenv中安装的setuptools版本有关。降级到一个较旧的版本修复了我。

从你的才能：

 pip install setuptools==21.2.1 pip install flask

我昨天有这个问题。我解决了它通过下载MarkupSafe 车轮和安装与点。问题就在我头上。一些关于编译器标志，以便在生成Speedups文件时抑制错误，我想。

1）从上面的链接下载轮子。

2）在Windows上，在与车轮相同的目录中打开一个命令窗口。

3）运行“pip安装”

在没有C编译器的系统上，Win7的MarkupSafe的setup.py被打破了。（我保留一个独立的虚拟机VC ++的工作）我这样做是为了让它工作：

 pip download MarkupSafe mkdir temp open MarkupSafe-0.23.tar.gz with 7-zip, extract all to temp cd temp edit setup.py line 119 to read: if 0: #not (is_pypy or is_jython): python setup.py install

我没有尝试调试setup.py来正常工作。我只是想尝试Flask，因为它应该是轻量级和易于学习，官方文档说它安装在Windows上。也许我应该回到Perl …

与其他海报不同，MarkupSafe的全局点子安装也不适用于我。

这些链接对问题有其他观点/见解： https ： //github.com/pallets/markupsafe/issues/26 https://github.com/babun/babun/issues/315

好。我知道了。我不认为我安装烧瓶的方式有什么问题，正如我已经在我的问题中提到的那样，我可以在全局安装（不在virtualenv中运行）。 MarkupSafe包有一个使用c实现的扩展，我的本地机器上没有安装windows sdk，所以当ve_build_ext运行时，****总是失败**

如果不是这样（is_pypy或者is_jython），它会给出警告，这是我在全局安装时得到的。但是，在virtualenv下运行时，它会崩溃。所以我敢肯定，在virtualenv下运行时，hasattr（sys，'pypy_version_info'）返回true。

有没有人知道“hasattr（sys，'pypy_version_info'）”是什么意思？

 # fail safe compilation shamelessly stolen from the simplejson # setup.py file. Original author: Bob Ippolito is_jython = 'java' in sys.platform is_pypy = hasattr(sys, 'pypy_version_info') def run_setup(with_binary): ext = Extension('markupsafe._speedups', ['markupsafe/_speedups.c']) ext_modules = [ext] if with_binary else [] def try_building_extension(): try: run_setup(True) except BuildFailed: LINE = '=' * 74 BUILD_EXT_WARNING = 'WARNING: The C extension could not be ' \ 'compiled, speedups are not enabled.' echo(LINE) echo(BUILD_EXT_WARNING) echo('Failure information, if any, is above.') echo('Retrying the build without the C extension now.') echo() run_setup(False) echo(LINE) echo(BUILD_EXT_WARNING) echo('Plain-Python installation succeeded.') echo(LINE)

如果不是（is_pypy或is_jython）：try_building_extension（）else：run_setup（False）

今天我有这个问题，并能够通过手动安装轮盘文件的MarkupSafe解决它，根据林肯的建议上面。你可以在这里下载适当的文件。有几个可用。我不知道它们之间有什么区别，但是唯一能够安装在Windows 10上的是MarkupSafe-0.23-cp27-none-win32.whl 。下载之后，我把它复制到我使用virtualenv创建的目录（不知道是否有必要，但是这是我做的），并用pip安装它：

 C:\flask-test\venv>pip install MarkupSafe-0.23-cp27-none-win32.whl

从那个目录。之后，我回到主目录并安装了Flask

 C:\flask-test\venv>cd .. C:\flask-test>pip install Flask

它工作正常。