title: Install Twisted in python failed with 'No such file'
body: <p>I want use Twisted in Python, but when I installing ,in comes this error, how to handle it?</p>
  
  <pre><code>....
  running build_ext
  gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c conftest.c -o conftest.o
  gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c conftest.c -o conftest.o
  building 'twisted.runner.portmap' extension
  gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c twisted/runner/portmap.c -o build/temp.linux-i686-2.7/twisted/runner/portmap.o
  twisted/runner/portmap.c:10:20: fatal error: Python.h: No such file or directory
  compilation terminated.
  error: command 'gcc' failed with exit status 1
  </code></pre>