Ubuntu: How do I install Python 3.3?



Question:

I have downloaded Python 3.3 from the official site but no idea how to install it.

I'm using Ubuntu 12.04


Solution:1

Python 3.3 has been released on 29 September 2012, several months after Ubuntu 12.04 was released. It is included in Ubuntu 12.10 though as python3.3 package

If you want to install Python 3.3 on Ubuntu version which does not have it in its repositories, you have the following options:

Use a PPA

There's a PPA containing Old and New Python versions maintained by Felix Krull. See Luper Rouch's answer for installation instructions.

Compile Python from source

This is very easy and allows you to have multiple Python versions without messing with system python interpreter (which is used by a lot of Ubuntu own programs). On my dev machine I have literally dozens of different Python versions from 2.4 to 3.2 living happily in /opt.

we need C compiler and other stuff to compile Python

sudo apt-get install build-essential  

SQLite libs need to be installed in order for Python to have SQLite support.

sudo apt-get install libsqlite3-dev  sudo apt-get install sqlite3 # for the command-line client  sudo apt-get install bzip2 libbz2-dev  

Download and compile Python:

wget http://www.python.org/ftp/python/3.3.5/Python-3.3.5.tar.xz  tar xJf ./Python-3.3.5.tar.xz  cd ./Python-3.3.5  ./configure --prefix=/opt/python3.3  make && sudo make install  

Some nice touches to install a py command by creating a symlink:

mkdir ~/bin  ln -s /opt/python3.3/bin/python3.3 ~/bin/py  

Alternatively, you can install a bash alias named py instead:

echo 'alias py="/opt/python3.3/bin/python3.3"' >> .bashrc  

And this is it. Now you can have any Python version, even an alpha, or, say, to have a few copies of Python 3.3 compiled with different settings... not that many people need that though :)

Use pyenv

There's a software called pyenv which may help you to automate the procedure - what it essentially does is compile Python from source, installing it in your home directory. Its goal is to help you manage multiple Python versions.


Solution:2

Here is what I did to install Python 3.3 on Ubuntu 12.04:

  1. Install dependencies:

    sudo apt-get build-dep python3.2  sudo apt-get install libreadline-dev libncurses5-dev libssl1.0.0 tk8.5-dev zlib1g-dev liblzma-dev  
  2. Download Python 3.3.0:

    wget http://python.org/ftp/python/3.3.0/Python-3.3.0.tgz  
  3. Extract:

    tar xvfz Python-3.3.0.tgz  
  4. Configure and Install:

    cd Python-3.3.0  ./configure --prefix=/opt/python3.3  make    sudo make install  
  5. Test if it worked:

    /opt/python3.3/bin/python3  

You should see something similar:

Python 3.3.0 (default, Jan 31 2013, 18:37:42)   [GCC 4.6.3] on linux  Type "help", "copyright", "credits" or "license" for more information.  >>>   

Some Additional things that are useful... you can create a virtual environment in your home and just activate Python 3.3 on demand..

  1. Create a Virtual Environment in your home:

    /opt/python3.3/bin/pyvenv ~/py33  
  2. Activate the virtualenv:

    source ~/py33/bin/activate  
  3. Install distribute tools:

    wget http://python-distribute.org/distribute_setup.py  python distribute_setup.py  
  4. Install pip:

    easy_install pip  
  5. Install any python packages you want (i.e. bottle)

    pip install bottle  

Enjoy!


Solution:3

The deadsnakes PPA has packages for old and new python versions:

sudo apt-get install python-software-properties  sudo add-apt-repository ppa:fkrull/deadsnakes  sudo apt-get update  sudo apt-get install python3.3  


Solution:4

Use the package manager to install python 3 top of regular python on Ubuntu:

sudo apt-get install python3  python3 --version  Python 3.2.3  python --version  Python 2.2.3  


Solution:5

For anyone who is interested, I wrote a more verbose step-by-step article on how to install Python 3.3.2 locally from source on Ubuntu 12.04, mostly based on reading @sergey's excellent answer above: http://nicholsonjf.com/blog/install-python3-locally-from-source


Solution:6

I have written a script to automate all of the downloading, compiling and installing of non-package Python versions. The script installs the Python version in /opt safely away from the package manager and system versions of Python.

It even fetches the dependencies as well for most versions of Ubuntu. It should work on all currently supported Ubuntu versions (10.04, 12.04, 12.10, and 13.04), and probably on other versions.

I include it below, and have posted it also at my Github repository, which is the master location.

The script should be copied and saved into a text editor as, for example, build_python, and made executable (chmod u+x build_python) and then can be run with two parameters, where the first parameter must always be the Python branch, and the second parameter must always be the Python version.

See python.org for the listings for the version you wish to compile.

Here are a couple of example of the script's usage:

  1. For the stable release, after having checked the listings, it can be run as

    ./build_python '3.3.2' '3.3.2'  
  2. For the development release, where the two parameters are different in the listings, it can be run as:

    ./build_python '3.4.0' '3.4.0a1'  

The body of the script is reproduced below (no syntax highlighting here. For that, see my Github page:

#!/usr/bin/env bash    # by mik, aka Exactus29, https://github.com/Exactus29  #   #  # This program is free software; you can redistribute it and/or modify  # it under the terms of the GNU General Public License as published by  # the Free Software Foundation; either version 2 of the License, or  # (at your option) any later version.    # This program is distributed in the hope that it will be useful,  # but WITHOUT ANY WARRANTY; without even the implied warranty of  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the  # GNU General Public License for more details.    # You should have received a copy of the GNU General Public License  # along with this program. If not, see <http://www.gnu.org/licenses/>.    ##########    # a script to compile the latest stable version of Python and place in /opt    (( $# == 2 )) || { printf "Please provide a version branch (e.g. 3.4.0) and a version release (e.g. 3.4.0a1) in that order.\n"                     printf "The official site is python.org, see the ftp server at: http://python.org/ftp/python.\n" >&2 ; exit 1; }    # a splew of variables, so that just the version number can be given on the cmd line  # and then then the script can do the rest, including verifying the packages using gpg    # need different branch and version as sometimes the two are different, particularly for dev releases  py_branch="$1"  py_version="$2"  shift 2    # check if install target already exists in /opt, and exit so user can decide what to do  if [[ -d /opt/python-${py_version} ]]; then       printf "Target directory for the build already exists, please rename or remove.\n" >&2      exit 1  else       :  fi    # use tar.bz2 as that is what most of the older releases used, i.e. in case user tries to build an older release  py_url="http://python.org/ftp/python/${py_branch}/Python-${py_version}.tar.bz2"  py_asc="http://python.org/ftp/python/${py_branch}/Python-${py_version}.tar.bz2.asc"  py_dir="$HOME/src/python_build" # checked to exist later, etc    # first check if user requested file exists on server  wget --spider ${py_url} >/dev/null 2>&1  (( $? > 0 )) && printf "No such version, version ${py_version} does not exist\n" >&2 && exit 1      # now very important before we do anything else, to check if asc file exists, as it  doesn't for some downloads  # if we don't check and it doesn't exist it causes the script to exit    wget --spider ${py_asc} >/dev/null 2>&1  # set a flag re whether asc file exists, so can check later and avoid problems  (( $? > 0 )) && no_asc=1 || no_asc=0    # set up more variables  py_tarbz2="${py_url##*/}"  (( no_asc == 0 )) && py_tarbz2_asc="${py_asc##*/}" # only set this if there is an asc file  py_folder="${py_tarbz2%.*.*}"  py_gpg_key=""     # check other build dependencies are installed, beyond build-dep, sqlite support, readline, ncurses, build-essential   dependencies_check() {        local installed=()      local to_be_installed=()      local dependencies_list=(build-essential wget libreadline-dev libncurses5-dev libssl1.0.0 tk8.5-dev zlib1g-dev liblzma-dev  libsqlite3-dev sqlite3 bzip2 libbz2-dev)            for package in "${dependencies_list[@]}"; do           if grep -iq '^ii' < <(dpkg -l "$package"); then              installed+=("$package")          else               to_be_installed+=("$package")          fi      done 2>/dev/null        if (( ${#to_be_installed[@]} > 0 )); then          printf "If you have recently elevated your privileges with sudo, you will not see a "           printf "prompt here, before the apt-get update and install of packages occurs.\n"           sleep 2          sudo -p "We need to install some dependencies, please enter your password: " apt-get update && sudo apt-get -y install "${to_be_installed[@]}"          return 0      else           printf "\nNothing to install, proceeding.\n"          return 0      fi    }    # tailor build-dep to new python version we want to build, basically either 2x or 3x versions  # should work with at least lucid/precise/quantal/raring/saucy, the currently supported versions  if (( ${py_branch:0:1} == 3 )) && grep -iq 'precise' /etc/lsb-release 2>/dev/null; then      sudo -p "Please provide your password to install dependencies: " apt-get build-dep python3.2 && dependencies_check  elif (( ${py_branch:0:1} == 3 )) && grep -Eiq '(raring|quantal|saucy)' /etc/lsb-release 2>/dev/null; then      sudo -p "Please provide your password to install dependencies: " apt-get build-dep python3.3 && dependencies_check  elif [[ ${py_branch:0:3} == 2.7 ]] && grep -iq 'lucid' /etc/lsb-release 2>/dev/null; then      sudo -p "Please provide your password to install dependencies: " apt-get build-dep python2.6 && dependencies_check  elif [[ ${py_branch:0:3} == 2.7 ]]; then      sudo -p "Please provide your password to install dependencies: " apt-get build-dep python2.7 && dependencies_check  else      printf "\nProceeding, but make sure you have the correct build deps installed.\n\n"      sleep 2          fi    # dir checks  if [[ -d $HOME/src ]]; then       cd $HOME/src || exit 1  else      mkdir $HOME/src && cd $HOME/src  fi    if [[ -d ${py_dir} ]]; then      mv "${py_dir}" "${py_dir}_old_$(date '+%F_%H_%M_%S')"      mkdir "${py_dir##*/}" && cd "${py_dir##*/}"  else      mkdir "${py_dir##*/}" && cd "${py_dir##*/}"  fi    # finally, download python   printf "\nNow downloading version ${py_version} from branch ${py_branch} ....."  wget "${py_url}" -P "${py_dir}" >/dev/null 2>&1  (( $? == 0 )) && printf "Done.\n"  # only download asc if it exists, set flag earlier  (( no_asc == 0 )) && wget "${py_asc}" -P "${py_dir}" >/dev/null 2>&1    # gpg tests    gpg_test() {      # if error returned, extract gpg key from error message      py_gpg_key="$(gpg --verify "${py_tarbz2_asc}" "${py_tarbz2}" 2>&1 | awk '{ print $NF }' | grep -v found)"        # now check with gpg_key (should be Python release signing key)      printf "\nReceiving keys.. "      gpg --recv-keys "${py_gpg_key}" >/dev/null 2>&1      (( $? > 0)) && printf "Key could not be received\n" || printf "Done.\n"        printf "\nVerifying download... "      gpg --verify "${py_tarbz2_asc}" "${py_tarbz2}" >/dev/null 2>&1      (( $? > 0 )) && printf "The download could not be verified.\n" || printf "Done.\n"    }    if (( no_asc == 0 )); then      gpg --verify "${py_tarbz2_asc}" "${py_tarbz2}" >/dev/null 2>&1      if (( $? > 0 )); then           gpg_test       else          printf "\nDownload verified\n\n"      fi  else      printf "\nProceeding even though asc file is not available for gpg to verify download\n\n"      sleep 1  fi    # unpack and cd to the python folder  printf "Unpacking archive...."  tar xvjf "${py_folder}.tar.bz2" >/dev/null 2>&1  (( $? == 0 )) && printf "Done.\n" || { printf "Problems occured when unpacking, exiting\n" >&2; exit 1; }  cd "${py_folder}" || exit 1    # tailor the build to your machine here with configure and make    printf "\nNow for the configure (default prefix is /opt/python-${py_version})...."  sleep 2  ./configure --prefix=/opt/python-${py_version} >/dev/null 2>&1  # as configure and make will exit anyway on error, no need to add || alternatives to the tests below  (( $? == 0 )) && printf "Done.\n\n"    sleep 1    printf "\nNow for the compile. (If necessary, please add your own specifications to the make command line and run the script again)\n"  printf "\nPlease wait for the compile to finish: it may take a while...."  make >/dev/null 2>&1  (( $? == 0 )) && printf "Done.\n\n"    printf "\nWe are installing with make install into /opt, instead of using checkinstall.\n"  sudo make install >/dev/null 2>&1  installcode=$?  (( $installcode == 0 )) && printf "\n${py_version} succesfully installed in /opt/python-${py_version}\n\n"    if [[ -d $HOME/bin ]]; then      ln -s /opt/python-${py_version}/bin/python${py_version:0:3} ~/bin/py-${py_version}      (( $? == 0 )) && printf "\nSymlink created, run py-${py_version} in the terminal to launch the interpreter\n"  else      mkdir $HOME/bin && ln -s /opt/python-${py_version}/bin/python${py_version:0:3} ~/bin/py-${py_version}      (( $? == 0 )) && printf "\nSymlink created, run py-${py_version} in the terminal to launch the interpreter\n"      printf "\nHowever, you will not be able to call py-${py_version} until you have logged out and in again, as bin will not"      printf " have been added to your path just as $HOME/bin is created.\nn"  fi    # important info re setting up pyvenv re distribute tools and pip etc  cat <<extra_info                See also a program called pyvenv with your installation in /opt,               with which you can create a virtual environment and use tools              such as pip, etc. See the official documentation at:              http://docs.python.org/3.3/using/scripts.html#pyvenv-creating-virtual-environments    extra_info    sleep 2   exit ${installcode}  


Solution:7

Warning: Pythonbrew has been deprecated in favor of pyenv. Updated instructions are here

Also you can use something like pythonbrew:

curl -kL http://xrl.us/pythonbrewinstall | bash      echo "[[ -s $HOME/.pythonbrew/etc/bashrc ]] && source $HOME/.pythonbrew/etc/bashrc" >> ~/.bashrc      pythonbrew install 3.3  

It's quite easy to use, and another benefit, that it's possible to install any python version you need. Please see their docs for mode details


Solution:8

Here are the steps that I followed:

wget http://python.org/ftp/python/3.3.2/Python-3.3.2.tar.bz2  tar -xvjf ./Python-3.3.2.tar.bz2  cd ./Python-3.3.2  ./configure --prefix=/opt/python3.3  make && make install  mkdir ~/bin  ln -s /opt/python3.3/bin/python ~/bin/py  echo 'alias py="/opt/python3.3/bin/python3"' >> .bashrc  

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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