Question

我在Windows机器上使用python 2.7。我可以使用pip install安装flask，如下所示：

cool 但是，在我创建了virtualenv后，我在尝试做同样的事情时得到了以下错误。

脚本：

$pip install virtualenv  
$cd /d d:
$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 -d c:\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

错误消息对任何人都有意义吗？感谢

Answer 1

此问题似乎与virtualenv中安装的setuptools版本有关。降级到旧版本为我修复了它。

来自你的virtualenv：

pip install setuptools==21.2.1
pip install flask

Answer 2

昨天我遇到了这个问题。我通过下载MarkupSafe wheel并使用pip安装解决了这个问题。问题在于我的头脑。关于生成Speedups文件时出现错误的编译器标志，我认为。

1）从上面的链接下载车轮。

2）在Windows上，打开与滚轮相同目录中的命令窗口。

3）运行＆＃34; pip Install＆＃34;

Answer 3

对于没有C编译器的系统上的Win7，MarkupSafe的setup.py被破坏了。（我为VC ++工作保留了一个单独的VM）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以正常工作。我只想尝试Flask，因为它应该是轻量级且易于学习的，并且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的全球点播安装对我来说也不起作用。

这些链接有关于此问题的其他观点/见解： https://github.com/pallets/markupsafe/issues/26 https://github.com/babun/babun/issues/315

Answer 4

确定。我明白了。我不认为我安装烧瓶的方式有任何问题，正如我在我的问题中已经提到的，我能够在全球范围内安装它（无需在virtualenv中运行）。 MarkupSafe包有一个使用c实现的扩展，我没有在我的本地机器上安装windows sdk，所以当ve_build_ext运行时， ****它总是失败**

区别在于，如果不是（is_pypy或is_jython），它会发出警告，这是我在全局安装时得到的;但是，当它在virtualenv下运行时崩溃了。所以我很确定hasattr（sys，'pypy_version_info'）在virtualenv下运行时返回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（）其他： run_setup（假）

Answer 5

我今天遇到了这个问题，并且根据林肯的建议，可以通过从MarkupSafe文件手动安装wheel来解决此问题。您可以下载相应的文件here。有几个可用。我不知道它们之间的区别是什么，但是唯一一个甚至可以安装在Windows 10上的是MarkupSafe-0.23-cp27-none-win32.whl。下载后，我将其复制到我使用virtualenv创建的目录中（不确定是否有必要，但这就是我所做的）并使用pip安装它：

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

从该目录。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。

falied在windows下的virutalenv下安装烧瓶 - [错误2]系统找不到指定的文件

5 个答案: