greenlet.h:8:20: fatal error: Python.h: No such file or directory

Fix:
#sudo apt-get install python-dev


 Error:
 ========
 Running setup.py install for greenlet
    building 'greenlet' extension
    x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c greenlet.c -o build/temp.linux-x86_64-2.7/greenlet.o
    In file included from greenlet.c:5:0:
    greenlet.h:8:20: fatal error: Python.h: No such file or directory
     #include
                        ^
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
    Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/greenlet/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-pd1And-record/install-record.txt --single-version-externally-managed --compile:
    running install

running build

running build_ext

building 'greenlet' extension

creating build

creating build/temp.linux-x86_64-2.7

x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c greenlet.c -o build/temp.linux-x86_64-2.7/greenlet.o

In file included from greenlet.c:5:0:

greenlet.h:8:20: fatal error: Python.h: No such file or directory

 #include

                    ^

compilation terminated.

error: command 'x86_64-linux-gnu-gcc' failed with exit status 1