I Have Python on My Ubuntu System, But Gcc Can't Find Python.H

fatal error: Python.h: No such file or directory

I managed to solve this issue and generate the .so file in one command

gcc -shared -o UtilcS.so
-fPIC -I/usr/include/python2.7 -lpython2.7  utilsmodule.c

Fatal error: Python.h no such file or directory - but python-dev is already installed

I ran ./configure for mod_wsgi and saw the output checking for python... /usr/bin/python. When I run locate Python.h it gives me /usr/include/python3.6m/Python.h. So it looks like the configuration was finding the wrong version of python. I then ran ./configure --with-python=/usr/bin/python3.6m as suggested by the mod_wsgi documentation. Now running make was successful.

I later found out this is the tougher way to install mod_wsgi though. I ended up just following this tecadmin guide which says to run the command sudo apt-get install libapache2-mod-wsgi. This is what I did and mod_wsgi is now working with apache.

Can't find Python.h file while installing Watchman

Usually its the python-dev libs missing. Are you sure the configure uses the python 3 instead of python 2? Because if thats the case you should install python-dev instead of python3-dev.

Python.h missing from Ubuntu 12.04

This should do it:

sudo apt-get update; sudo apt-get install python-dev -y

It will install any missing headers. It helped me a lot.

Can't find Python.h file on CentOS

On my system the Python.h header file is in the path /usr/include/python2.6/. As this path is not searched by the pre-processor by default, you have to add it to the list of paths to search. This is done with the -I option to the compiler, like this:

$ gcc -I/usr/include/python2.6 source.c -o program

Change the path above to the actual path on your system. You can find it either with the find command as proposed in a comment, of with the locate command if it's installed.

Python.h: No such file or directory

In your CMakeLists.txt, try adding the following:

find_package(PythonLibs REQUIRED)
include_directories(${PYTHON_INCLUDE_DIRS})
target_link_libraries(<your exe or lib> ${PYTHON_LIBRARIES})

For details of the commands, run:

cmake --help-module FindPythonLibs
cmake --help-command find_package
cmake --help-command include_directories
cmake --help-command target_link_libraries

Distutils can't find Python.h

May be in your module, you need to include "Python.h" instead of "Python/Python.h"?

or you may try exporting include path, and try compiling again with gcc or g++?

export C_INCLUDE_PATH=/usr/include/python2.6:$C_INCLUDE_PATH
export CPLUS_INCLUDE_PATH=/usr/include/python2.6:$CPLUS_INCLUDE_PATH

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