Jaroslav Urban added the comment:
just a remark, my system is
$uname -r
4.4.5-200.fc22.x86_64
and these python-related rpm archives are installed:
$rpm -qa | grep python
python-IPy-0.81-12.fc22.noarch
python-urllib3-1.13.1-3.fc22.noarch
libselinux-python-2.3-10.fc22.x86_64
python-kitchen
New submission from Jaroslav Urban:
#wget https://www.python.org/ftp/python/3.5.1/Python-3.5.1.tar.xz
#xz -d Python-3.5.1.tar.xz
#tar xvf Python-3.5.1.tar
#cd Python-3.5.1
#./configure --prefix=/usr
#make
#make altinstall
---
so far so good
but afterwards