How do I install a specific version of Python?

To download older version of python :
scroll down a bit and click on the version you want. then scroll to the bottom (the files section) if you are a 64-bit user then click on Windows x86-64 executable installer. if you are a 32-bit user then click on Windows x86 executable installer.
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How do I install a different version of Python?

Install that version using "make install". Install all other versions using "make altinstall". For example, if you want to install Python 2.5, 2.6 and 3.0 with 2.6 being the primary version, you would execute "make install" in your 2.6 build directory and "make altinstall" in the others.
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How do I use a specific version of Python?

As a standard, it is recommended to use the python3 command or python3. 7 to select a specific version. The py.exe launcher will automatically select the most recent version of Python you've installed. You can also use commands like py -3.7 to select a particular version, or py --list to see which versions can be used.
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How do I install a specific version of Python in Windows?

  1. Step 1: Select Version of Python to Install.
  2. Step 2: Download Python Executable Installer.
  3. Step 3: Run Executable Installer.
  4. Step 4: Verify Python Was Installed On Windows.
  5. Step 5: Verify Pip Was Installed.
  6. Step 6: Add Python Path to Environment Variables (Optional)
  7. Step 7: Install virtualnv (Optional)
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Can I have 2 Python versions?

If you wish to use multiple versions of Python on a single machine, then pyenv is a commonly used tool to install and switch between versions. This is not to be confused with the previously mentioned depreciated pyvenv script. It does not come bundled with Python and must be installed separately.
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A guide to download and install specific version of python in Windows.



How do I install a lower version of Python?

To download older version of python :
  1. hover over downloads button and click on View the full list of downloads.
  2. scroll down a bit and click on the version you want.
  3. then scroll to the bottom (the files section)
  4. if you are a 64-bit user then click on Windows x86-64 executable installer.
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How do I run Python 2 when Python 3 is installed?

Note the steps below.
  1. Install the required version of Python 2.
  2. Install the required version of Python 3.
  3. Open the command prompt on your device.
  4. In the command prompt, type py -2.x to launch any version of Python 2.
  5. In the command prompt, type py -3. x to launch any version of Python 3.
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How do I downgrade Python version?

We can remove and install the required version of Python to downgrade it. First, we need to download the package from the official website and install it. Then, we need to go to the Frameworks\Python. framework\Versions directory and remove the version which is not needed.
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How do I switch from Python 3.8 to 3.7 Ubuntu?

“downgrade python 3.8 to 3.7 ubuntu” Code Answer
  1. sudo add-apt-repository ppa:deadsnakes/ppa.
  2. sudo apt-get update.
  3. sudo apt-get install python3.7.
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How do I downgrade from Python 3.9 to 3.8 Ubuntu?

Just follow this step.
  1. First of all download your wanted python version from official python website and install it as a normal package .
  2. Then run this code cd /Library/Frameworks/Python.framework/Version.
  3. Now, Execute ls to list all installed Python versions.
  4. Then run sudo rm -rf 3. ...
  5. After all of that check python3 -v .
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How do I downgrade from 3.9 to 3.8 in Virtualenv?

Downgrade Python 3.9 to 3.8 With the virtualenv Module
  1. Copy virtualenv \path\to\env -p \path\to\python_install. exe.
  2. Copy \path\to\env\Scripts\activate. bat.
  3. Copy conda create -n downgrade python=3.8 anaconda.
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How do I replace Python 2 with Windows 3?

Here's my setup: Install both Python 2.7 and 3.4 with the windows installers. Go to C:\Python34 (the default install path) and change python.exe to python3.exe.
...
So to be able to use multiple versions of Python:
  1. install Python 2. x (x is any version you need)
  2. install Python 3. ...
  3. open Command Prompt.
  4. type py -2. ...
  5. type py -3.
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Will Python 2 programs work with Python 3?

Python version 3 is not backwardly compatible with Python 2. Many recent developers are creating libraries which you can only use with Python 3. Many older libraries created for Python 2 is not forward-compatible.
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How do I upgrade from Python 3.6 to 3.7 CentOS?

How To Install Python 3.7 on CentOS/RHEL 7 & Fedora 34/33
  1. Step 1 – Requirements. This Python installation required the GCC compiler on your system. ...
  2. Step 2 – Download Python 3.7. Download Python using the following command from the Python official site. ...
  3. Step 3 – Install Python 3.7. ...
  4. Step 4 – Check Python Version.
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How do I manage multiple versions of Python?

In this article, you'll learn how to:
  1. Install multiple versions of Python.
  2. Install the latest development version of Python.
  3. Switch between the installed versions.
  4. Use virtual environments with pyenv.
  5. Activate different Python versions and virtual environments automatically.
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Should I use Python2 or python3?

Should I use Python 2 or Python 3 for my development activity? Python 3 is strongly recommended for any new development. As of January 2020, Python 2 has reached End Of Life status, meaning it will receive no further updates or bugfixes, including for security issues.
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How do I know if Python is 2 or 3?

If you want to determine whether Python2 or Python3 is running, you can check the major version with this sys. version_info. major . 2 means Python2, and 3 means Python3.
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Why is Python 3 better than 2?

Python 3 is definitely more readable, easier to grasp, and popular than Python 2. Python 2 has definitely run out of steam and one should learn Python 2 if and only if some legacy code has been written in Python 2 or if a company needs the developer to migrate the Python 2 code into Python 3.
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How do I install two versions of Python on Windows?

Open the Executable File:
  1. Double-click the Python file.
  2. Check the “Add Python ** to PATH” box.
  3. Click “Install Now”
  4. Repeat.
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How do I make Python 2.7 My default Windows?

From here navigate to the Advanced Tab -> Click on Environment Variables. You will see a top half for the user variables and the bottom half for System variables. Check the System Variables and double-click on the Path (to edit the Path). Check for the path of Python(which you wish to run i.e. Python 2.
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How do I convert Python 2 script to Python 3?

We can convert Python2 scripts to Python3 scripts by using 2to3 module. It changes Python2 syntax to Python3 syntax. We can change all the files in a particular folder from python2 to python3.
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How do I install a different version of python in a virtual environment?

To create a virtual environment with another Python version, you have to take the following steps.
  1. Download the Python version that you need, e.g. Python 3.6.
  2. Install the Python executable. ...
  3. Run Virtual Studio Code (or any other editor or terminal). ...
  4. Install virtualenv in your main Python version via pip install virtualenv.
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How do I change the python environment version?

Change Python Version in an Existing Virtualenv
  1. Deactivate your current environment session.
  2. If you have many packages or libraries installed, it would be a good idea to make a requirements. ...
  3. Remove the virtualenv with the wrapper command: rmvirtualenv. ...
  4. Make a new virtualenv with the Python version you want.
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How do I downgrade python from 3.8 to 3.6 Ubuntu?

“downgrade python 3.8 to 3.6 ubuntu 20.04” Code Answer
  1. sudo add-apt-repository ppa:deadsnakes/ppa.
  2. sudo apt-get update.
  3. sudo apt-get install python3.7.
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How do I switch between Python versions in Ubuntu?

Switch Python Version on Ubuntu & Debian
  1. Create a symlink from /usr/bin/python2. ...
  2. Change the symlink link to /usr/bin/python3. ...
  3. Repeat step 2 to add more Python version to group, which is already installed on your system.
  4. At this point, You have added two python binary versions to the group name “python”. ...
  5. That's it.
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