Did your pip install fail with longintrepr.h: No such file or directory? The file likely is on your system, but it sometime or another it was moved, from /usr/include/python3.xx/longintrepr.h to /usr/include/python3.xx/cpython/longintrepr.h.
Did your pip install fail with longintrepr.h: No such file or directory? The file likely is on your system, but it sometime or another it was moved, from /usr/include/python3.xx/longintrepr.h to /usr/include/python3.xx/cpython/longintrepr.h.