pip安装时报【fatal error: Python.h: N

用pip安装第三方包的时候，有时候会遇到fatal error: Python.h: No such file or directory compilation terminated这样的报错。因为这些库使用了c扩展，需要编译，然后又找不到头文件和静态库导致的。编译这些c库需要的依赖库由python dev提供，安装即可：

For apt (Ubuntu, Debian...):

sudo apt-get install python-dev   # for python2.x installs
sudo apt-get install python3-dev  # for python3.x installs

For yum (CentOS, RHEL...):

sudo yum install python-devel   # for python2.x installs
sudo yum install python34-devel   # for python3.4 installs

For dnf (Fedora...):

sudo dnf install python2-devel  # for python2.x installs
sudo dnf install python3-devel  # for python3.x installs

For zypper (openSUSE...):

sudo zypper in python-devel   # for python2.x installs
sudo zypper in python3-devel  # for python3.x installs