Create a file in the apt souces directory:
$ [sudo] vim /etc/apt/sources.list.d/jessie.list
Add this line:*
deb http://httpredir.debian.org/debian jessie main
Create a file in the apt preferences directory:
$ [sudo] vim /etc/apt/preferences.d/python3.pref
Add those line:
Package: python3 python3-dev python3-pip
Pin: release n=jessie
Pin-Priority: 910
Install python3!
$ [sudo] apt-get update \
> && [sudo] apt-get install python3 python3-dev python3-pip
See detail on each field on apt_preference manpage
The following extra packages will be installed:
- dh-python
- libc-bin
- libc-dev-bin
- libc6
- libc6-dev
- libdb5.3
- libffi6
- libgssapi-krb5-2
- libk5crypto3
- libkeyutils1
- libkrb5-3
- libkrb5support0
- libmpdec2
- libpython3-dev
- libpython3-stdlib
- libpython3.4
- libpython3.4-dev
- libpython3.4-minimal
- libpython3.4-stdlib
- libtirpc1
- locales
- nfs-common
- python3-chardet
- python3-colorama
- python3-distlib
- python3-html5lib
- python3-minimal
- python3-requests
- python3-six
- python3-urllib3
- python3-wheel
- python3.4
- python3.4-dev
- python3.4-minimal
- task-english
- tasksel
Suggested packages:
- glibc-doc
- krb5-doc
- krb5-user
- open-iscsi
- watchdog
- python3-doc
- python3-tk
- python3-venv
- python3-genshi
- python3-lxml
- python3-ndg-httpsclient
- python3-openssl
- python3-pyasn1
- python3.4-venv
- python3.4-doc
- binfmt-support
The following NEW packages will be installed:
- dh-python
- libdb5.3
- libffi6
- libmpdec2
- libpython3-dev
- libpython3-stdlib
- libpython3.4
- libpython3.4-dev
- libpython3.4-minimal
- libpython3.4-stdlib
- python3-chardet
- python3-colorama
- python3-distlib
- python3-html5lib
- python3-requests
- python3-six
- python3-urllib3
- python3-wheel
- python3.4
- python3.4-dev
- python3.4-minimal
The following packages will be upgraded:
- libc-bin
- libc-dev-bin
- libc6
- libc6-dev
- libgssapi-krb5-2
- libk5crypto3
- libkeyutils1
- libkrb5-3
- libkrb5support0
- libtirpc1
- locales
- nfs-common
- python3
- python3-dev
- python3-minimal
- python3-pip
- task-english
- tasksel
Sources: