I have Python 3.7.3

When I try spack install py-matplotlib
I get

"py-matplotlib requires python version 3.5:, but spec asked for 2.7.15"

If I try to install using
spack installl py-matplotlib ^[email protected]

I get this error.

640 /opt/rh/devtoolset-2/root/usr/libexec/gcc/x86_64-redhat-linux/4.8.2
/ld: /usr/local/lib/libpython3.7m.a(bytesobject.o): relocation R_X8
6_64_32 against `_Py_NoneStruct' can not be used when making a shar
ed object; recompile with -fPIC
641 /usr/local/lib/libpython3.7m.a: could not read symbols: Bad value

642 collect2: error: ld returned 1 exit status
643 error: command '/opt/rh/devtoolset-2/root/usr/bin/gcc' failed with
exit status 1

I am new to spack and any help would be appreciated.