How do I upgrade the Python installation in Windows 10

Question

I have a Python 2 7 11 installed on one of my LAB stations  I would like to upgrade Python to at least 3 5   How should I do that   Should I prefer to completely uninstall 2 7 11 and than install the new one   Is there a way to update it   Is an update a good idea

User · Answer

python -m pip install --upgrade pip

User · Answer

x000D   x000D   Update your pip version python -m pip install pip  else python -m pip install    upgrade pip x000D   x000D   x000D

User · Answer

In 2019  you can install using chocolatey  Open your cmd or powershell  type  choco install python

User · Answer

Python 2 x and Python 3 x are different  If you would like to download a newer version of Python 2  you could just download and install the newer version   If you want to install Python 3  you could install Python 3 separately then change the path for Python 2 x to Python 3 x in Control Panel   All Control Panel Items   System   Advanced System Settings   Environment Variables

User · Answer

Just install python newest version s installer it will automatically detect your python version and will say upgrade python and starts upgrading

User · Answer

Installing Upgrading Python Using the Chocolatey Windows Package Manager Let s say you have Python 2 7 16      C  Windows system32 gt python --version     python2 2 7 16     and you want to upgrade to the  now current  3 x y version   There is a simple way to install a parallel installation of Python 3 x y using a Windows package management tool  Now that modern Windows has package management  just like Debian Linux distributions have apt-get  and RedHat has dnf  we can put it to work for us   It s called Chocolatey  What s Chocolatey  Chocolatey is a scriptable  command line tool that is based on  NET 4 0 and the nuget package manager baked into Visual Studio  If you want to learn about Chocolatey and why to use it  which some here reading this might find particularly useful  go to https   chocolatey org docs why Installing Chocolatey To get the Chocolatey Package Manager  you follow a process that is described at https   chocolatey org docs installation installing-chocolatey  I ll summarize it for you here   There are basically two options  using the cmd prompt  or using the PowerShell prompt  CMD Prompt Chocolatey Installation Launch an administrative command prompt   On Windows 10  to do this   Windows R Type cmd Press ctrl shift Enter  If you don t have administrator rights on the system  go to the Chocolatey website   You may not be completely out of luck and can perform a limited local install  but I won t cover that here   Copy the string below into your command prompt and type Enter     quot  SystemRoot  System32 WindowsPowerShell v1 0 powershell exe quot  -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command  quot iex   New-Object System Net WebClient  DownloadString  https   chocolatey org install ps1    quot   amp  amp  SET  quot PATH  PATH   ALLUSERSPROFILE  chocolatey bin quot   Chocolatey will be downloaded and installed for you as below  Getting latest version of the Chocolatey package for download  Getting Chocolatey from https   chocolatey org api v2 package chocolatey 0 10 11  Downloading 7-Zip commandline tool prior to extraction  Extracting C  Users blahblahblah AppData Local Temp chocolatey chocInstall chocolatey zip to C  Users blahblahblah AppData Local Temp chocolatey chocInstall    Installing chocolatey on this machine Creating ChocolateyInstall as an environment variable  targeting  Machine     Setting ChocolateyInstall to  C  ProgramData chocolatey  WARNING  It s very likely you will need to close and reopen your shell   before you can use choco  Restricting write permissions to Administrators We are setting up the Chocolatey package repository  The packages themselves go to  C  ProgramData chocolatey lib     i e  C  ProgramData chocolatey lib yourPackageName   A shim file for the command line goes to  C  ProgramData chocolatey bin    and points to an executable in  C  ProgramData chocolatey lib yourPackageName    Creating Chocolatey folders if they do not already exist   WARNING  You can safely ignore errors related to missing log files when   upgrading from a version of Chocolatey less than 0 9 9     Batch file could not be found  is also safe to ignore     The system cannot find the file specified  - also safe  chocolatey nupkg file not installed in lib   Attempting to locate it from bootstrapper  PATH environment variable does not have C  ProgramData chocolatey bin in it  Adding    WARNING  Not setting tab completion  Profile file does not exist at  C  Users blahblahblah Documents WindowsPowerShell Microsoft PowerShell profile ps1   Chocolatey  choco exe  is now ready  You can call choco from anywhere  command line or powershell by typing choco  Run choco    for a list of functions  You may need to shut down and restart powershell and or consoles  first prior to using choco  Ensuring chocolatey commands are on the path Ensuring chocolatey nupkg is in the lib folder  Either Exit the CMD prompt or type the following command to reload the environment variables  refreshenv  PowerShell Chocolatey Installation If you prefer PowerShell to the cmd prompt  you can do this directly from there  however you will have to tell PowerShell to run with a proper script execution policy to get it to work   On Windows 10  the simplest way I have found to do this is to type the following into the Cortana search bar next to the Windows button  PowerShell exe  Next  right click on the  Best Match  choice in the menu that pops up and select  Run as Administrator  Now that you re in PowerShell  hopefully running with Administrator privileges  execute the following to install Chocolatey  Set-ExecutionPolicy Bypass -Scope Process -Force  iex   New-Object System Net WebClient  DownloadString  https   chocolatey org install ps1     PowerShell will download Chocolatey for you and launch the installation   It only takes a few moments   It looks exactly like the CMD installation  save perhaps some fancy colored text  Either Exit PowerShell or type the following command to reload the environment variables  refreshenv  Upgrading Python The choco command is the same whether you use PowerShell or the cmd prompt   Launch your favorite using the instructions as above   I ll use the administrator cmd prompt  C  WINDOWS system32 gt choco upgrade python -y  Essentially  chocolatey will tell you  quot Hey  Python isn t installed quot  since you re coming from 2 7 x and it treats the 2 7 version as completely separate  It is only going to give you the most current version  3 x y  as of this writing  3 7 2  but that will change in a few months   Chocolatey v0 10 11 Upgrading the following packages  python By upgrading you accept licenses for the packages  python is not installed  Installing     python3 v3 x y  Approved  python3 package files upgrade completed  Performing other installation steps  Installing 64-bit python3    python3 has been installed  Installed to   C  Python37     python3 can be automatically uninstalled  Environment Vars  like PATH  have changed  Close reopen your shell to  see the changes  or in powershell cmd exe just type  refreshenv     The upgrade of python3 was successful    Software installed as  exe   install location is likely default   python v3 x y  Approved  python package files upgrade completed  Performing other installation steps   The upgrade of python was successful    Software install location not explicitly set  could be in package or   default install location if installer   Chocolatey upgraded 2 2 packages   See the log for details  C  ProgramData chocolatey logs chocolatey log    Either exit out of the cmd Powershell prompt and re-enter it  or use refreshenv then type py --version C  Windows System32 gt refreshenv Refreshing environment variables from registry for cmd exe  Please wait   Finished    C  Windows system32 gt py --version Python 3 7 2  Note that the most recent Python install will now take over when you type Python at the command line   You can run either version by using the following commands  py -2 Python 2 7 16  v2 7 16 413a49145e  Mar  4 2019  01 37 19   MSC v 1500 64 bit  AMD64   on win32 Type  quot help quot    quot copyright quot    quot credits quot  or  quot license quot  for more information   gt  gt  gt  exit    C   gt py -3 Python 3 7 2  tags v3 7 2 9a3ffc0492  Dec 23 2018  23 09 28   MSC v 1916 64 bit  AMD64   on win32 Type  quot help quot    quot copyright quot    quot credits quot  or  quot license quot  for more information   gt  gt  gt exit   C   gt   From here I suggest you use the Python pip utility to install whatever packages you need   For example  let s say you wanted to install Flask   The commands below first upgrade pip  then install Flask C   gt py -3 -m pip install --upgrade pip Collecting pip   Downloading https   files pythonhosted org packages d8 f3 413bab4ff08e1fc4828dfc59996d721917df8e8583ea85385d51125dceff pip-19 0 3-py2 py3-none-any whl  1 4MB      100                                                                     1 4MB 1 6MB s Installing collected packages  pip   Found existing installation  pip 18 1     Uninstalling pip-18 1        Successfully uninstalled pip-18 1 Successfully installed pip-19 0 3  c   gt py -3 -m pip install Flask     will do the trick   Happy Pythoning

User · Answer

If you are upgrading any 3 x y to 3 x z  patch  Python version  just go to Python downloads page get the latest version and start the installation  Since you already have Python installed on your machine installer will prompt you for  Upgrade Now   Click on that button and it will replace the existing version with a new one  You also will have to restart a computer after installation     If you are upgrading from 3 x to 3 y  minor  then you will be prompted with  Install Now   In this case  you are not upgrading  but you are installing a new version of Python  You can have more than one version installed on your machine  They will be located in different directories  When you have more than one Python version on your machine you will need to use py lanucher to launch a specific version of Python   For instance      py -3 7   or      py -3 8   Make sure you have py launcher installed on your machine  It will be installed automatically if you are using default settings of windows installer  You can always check it if you click on  Customize installation  link on the installation window   If you have several Python versions installed on your machine and you have a project that is using the previous version of Python using virtual environment e g   venv  you can upgrade Python just in that venv using      python -m venv --upgrade  your virtual environment path    For instance  I have Python 3 7 in my   venv virtual environment and I would like upgrade venv to Python 3 8  I would do following     python -m venv --upgrade   venv

User · Answer

Every minor version of Python  that is any 3 x and 2 x version  will install side-by-side with other versions on your computer  Only patch versions will upgrade existing installations   So if you want to keep your installed Python 2 7 around  then just let it and install a new version using the installer  If you want to get rid of Python 2 7  you can uninstall it before or after installing a newer version   there is no difference to this   Current Python 3 installations come with the py exe launcher  which by default is installed into the system directory  This makes it available from the PATH  so you can automatically run it from any shell just by using py instead of python as the command  This avoids you having to put the current Python installation into PATH yourself  That way  you can easily have multiple Python installations side-by-side without them interfering with each other  When running  just use py script py instead of python script py to use the launcher  You can also specify a version using for example py -3 or py -3 6 to launch a specific version  otherwise the launcher will use the current default  which will usually be the latest 3 x    Using the launcher  you can also run Python 2 scripts  which are often syntax incompatible to Python 3   if you decide to keep your Python 2 7 installation  Just use py -2 script py to launch a script     As for PyPI packages  every Python installation comes with its own folder where modules are installed into  So if you install a new version and you want to use modules you installed for a previous version  you will have to install them first for the new version  Current versions of the installer also offer you to install pip  it   s enabled by default  so you already have pip for every installation  Unless you explicitly add a Python installation to the PATH  you cannot just use pip though  Luckily  you can also simply use the py exe launcher for this  py -m pip runs pip  So for example to install Beautiful Soup for Python 3 6  you could run py -3 6 -m pip install beautifulsoup4

[python] How do I upgrade the Python installation in Windows 10?

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