python3.4安装中的lxml错误

Question

我正在尝试在命令提示符下运行以下命令-

pip install -r requirements.txt

但是它显示了很多错误，我不知道如何解决它们，因为我不熟悉python。

错误是：1。

Collecting lxml==3.5.0 (from -r requirements.txt (line 1))
  Using cached lxml-3.5.0.tar.gz
Collecting pyquery==1.2.10 (from -r requirements.txt (line 2))
Collecting cssselect>0.7.9 (from pyquery==1.2.10->-r requirements.txt (line 2))




     Using cached cssselect-1.0.1-py2.py3-none-any.whl
        Building wheels for collected packages: lxml
          Running setup.py bdist_wheel for lxml ... error
          Complete output from command c:\python34\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Mohana\\AppData\\Local\\Temp\\pip-build-9bz1xoev\\lxml\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d C:\Users\Mohana\AppData\Local\Temp\tmp425xg1fhpip-wheel- --python-tag cp34:
          Building lxml version 3.5.0.
          Building without Cython.
          ERROR: b"'xslt-config' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"
          ** make sure the development packages of libxml2 and libxslt are installed **

2. 

    src\lxml\includes\etree_defs.h(14) : fatal error C1083: Cannot open include file: 'libxml/xmlversion.h': No such file or directory
      Compile failed: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\VC\\Bin\\cl.exe' failed with exit status 2
      creating Users
      creating Users\Mohana
      creating Users\Mohana\AppData
      creating Users\Mohana\AppData\Local
      creating Users\Mohana\AppData\Local\Temp
      C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\Bin\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -I/usr/include/libxml2 /TcC:\Users\Mohana\AppData\Local\Temp\xmlXPathInitocb5oi7w.c /FoUsers\Mohana\AppData\Local\Temp\xmlXPathInitocb5oi7w.obj
      xmlXPathInitocb5oi7w.c
      C:\Users\Mohana\AppData\Local\Temp\xmlXPathInitocb5oi7w.c(1) : fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
      *********************************************************************************
      Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
      *********************************************************************************
      error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\VC\\Bin\\cl.exe' failed with exit status 2

3。

Failed building wheel for lxml
  Running setup.py clean for lxml
Failed to build lxml
Installing collected packages: lxml, cssselect, pyquery
  Found existing installation: lxml 4.0.0
    Uninstalling lxml-4.0.0:
      Successfully uninstalled lxml-4.0.0
  Running setup.py install for lxml ... error
    Complete output from command c:\python34\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Mohana\\AppData\\Local\\Temp\\pip-build-9bz1xoev\\lxml\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\Mohana\AppData\Local\Temp\pip-rjvm3d2l-record\install-record.txt --single-version-externally-managed --compile:
    Building lxml version 3.5.0.
    Building without Cython.
    ERROR: b"'xslt-config' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"
    ** make sure the development packages of libxml2 and libxslt are installed **


4. 

    src\lxml\includes\etree_defs.h(14) : fatal error C1083: Cannot open include file: 'libxml/xmlversion.h': No such file or directory
        Compile failed: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\VC\\Bin\\cl.exe' failed with exit status 2
        C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\Bin\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -I/usr/include/libxml2 /TcC:\Users\Mohana\AppData\Local\Temp\xmlXPathInity8a5suic.c /FoUsers\Mohana\AppData\Local\Temp\xmlXPathInity8a5suic.obj
        xmlXPathInity8a5suic.c
        C:\Users\Mohana\AppData\Local\Temp\xmlXPathInity8a5suic.c(1) : fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
        *********************************************************************************
        Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
        *********************************************************************************
        error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\VC\\Bin\\cl.exe' failed with exit status 2

请帮助我解决这些问题，我在项目中需要它，而我确实需要完成它。 我在Windows 10（Intel处理器）和Python3.4上。

Answer 1

就像@SaeX在此答案中所说的那样，您可以在此处找到带有所需模块和依赖项的lxml的预编译WHL。

对于Python 3.4和win10，您的文件应为lxml‑4.1.0‑cp34‑cp34m‑win_amd64.whl 。 然后，您可以使用pip安装它：

pip install lxml‑4.1.0‑cp34‑cp34m‑win_amd64.whl

Answer 2

对于python 3.4或更高版本，

在命令提示符中，键入pip3 install lxml ，以防您要自动从网络下载和安装，请从下面下载lxml的.whl文件

对于32位： 在这里下载

对于64位： 在这里下载

下载wheel文件后，将命令提示符导航到.whl文件的下载位置，然后尝试pip3安装“ downloadd whl file name ”

Answer 3

对于Windows，如果也由于whl而失败，则可以通过exe文件安装lxml。 您可以从lxml下载它

希望这可以帮到你。