当我试图安装pyquery python模块时，为什么会收到这个错误？

Question

我使用以下命令

!pip install pyquery

我可以安装其他模块。有人知道为什么会这样吗？谢谢!

src/lxml/includes/etree_defs.h:14:10: fatal error: 'libxml/xmlversion.h' file not found
#include "libxml/xmlversion.h"
         ^
1 error generated.
Compile failed: command 'cc' failed with exit status 1
creating var
creating var/folders
creating var/folders/p1
creating var/folders/p1/xg17tts541n1__p_srg1n2j80000gn
creating var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T
cc -I/usr/include/libxml2 -I/usr/include/libxml2 -c /var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T/xmlXPathInit9XZ4sL.c -o var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T/xmlXPathInit9XZ4sL.o
/var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T/xmlXPathInit9XZ4sL.c:1:10: fatal error: 'libxml/xpath.h' file not found
#include "libxml/xpath.h"
         ^
1 error generated.
*********************************************************************************
Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
Perhaps try: xcode-select --install
*********************************************************************************
error: command 'cc' failed with exit status 1

----------------------------------------

命令"/usr/bin/python -c“导入setuptools，tokenize;file='/private/var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T/pip-build-nn9QXj/lxml/setup.py'；(编译(getattr(tokenize，'open'，open)(file).read().replace('\r\n'，'\n')，文件，‘exec’)“安装-记录/var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T/pip-X97yGE-record/install-record.txt -单版本-外部管理-编译”失败，错误代码1在/private/var/folders/p1/xg17tts541n1__p_srg1n2j80000gn/T/pip-build-nn9QXj/lxml中

Answer 1

基于这个参考http://forums.fedoraforum.org/showthread.php?t=297730，

我试着安装libffi，libxml2-devel，libxslt，它解决了这个问题。我使用的是CentOS 7。

Answer 2

src/lxml/include/etree_defs.h:14:10:致命错误：'libxml/xmlversion.h‘文件未找到 包含"libxml/xmlversion.h“

我对这类错误进行了计数。在大多数情况下，安装共享库的开发包时，模块需要修复它。

在Debian中，libxml2-dev拥有libxml2 pacakge的所有头文件。libxml2 2:amd64 64/jessie 2.9.1+dfsg1-5最新版本libxml2-dev:amd64 64/jessie 2.9.1+dfsg1-5

lxml模块需要libxml2-dev和libxslt1-dev。