Install python 3.7 windows 10

Install python 3.7 windows 10

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Python is a great programming language for beginners and advanced programmers. This guide will show you how to install Python 3.7 on Windows 10.

Download Python 3.7

Head on over to the Python releases page for Windows. Choose between 32 or 64 bit. If your code has a chance of using more than 4GB of memory, choose the 64 bit download. If not, the 32 bit will be perfectly fine. We are going to download and use the 32 bit version for this article. Once downloaded open the exe file to begin the installation.

Install Python 3.7

We are only going to modify one setting when installing Python and that setting is going to be on the very first screen when you open the installer. Check the Add Python 3.7 to Path checkbox and then click next.

It is best to restart the computer after the installation so that the PATH variables are updated.

Once restarted you now have Python 3.7 installed and can now access it through your preferred command line. Below is an example using Windows Powershell.

Install Python 3.7 Windows 10
How-To Install Python 3.7 On Windows 10

Happy Python coding!


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3. Using Python on Windows¶

This document aims to give an overview of Windows-specific behaviour you should know about when using Python on Microsoft Windows.

Unlike most Unix systems and services, Windows does not include a system supported installation of Python. To make Python available, the CPython team has compiled Windows installers (MSI packages) with every release for many years. These installers are primarily intended to add a per-user installation of Python, with the core interpreter and library being used by a single user. The installer is also able to install for all users of a single machine, and a separate ZIP file is available for application-local distributions.

As specified in PEP 11, a Python release only supports a Windows platform while Microsoft considers the platform under extended support. This means that Python 3.8 supports Windows Vista and newer. If you require Windows XP support then please install Python 3.4.

There are a number of different installers available for Windows, each with certain benefits and downsides.

The full installer contains all components and is the best option for developers using Python for any kind of project.

The Microsoft Store package is a simple installation of Python that is suitable for running scripts and packages, and using IDLE or other development environments. It requires Windows 10, but can be safely installed without corrupting other programs. It also provides many convenient commands for launching Python and its tools.

The packages are lightweight installations intended for continuous integration systems. It can be used to build Python packages or run scripts, but is not updateable and has no user interface tools.

The embeddable package is a minimal package of Python suitable for embedding into a larger application.

3.1. The full installer¶

3.1.1. Installation steps¶

Four Python 3.8 installers are available for download - two each for the 32-bit and 64-bit versions of the interpreter. The web installer is a small initial download, and it will automatically download the required components as necessary. The offline installer includes the components necessary for a default installation and only requires an internet connection for optional features. See Installing Without Downloading for other ways to avoid downloading during installation.

After starting the installer, one of two options may be selected:

Install Python 3.7 Windows 10
Download the latest version for Mac OS X

If you select “Install Now”:

  • You will not need to be an administrator (unless a system update for the C Runtime Library is required or you install the Python Launcher for Windows for all users)

  • Python will be installed into your user directory

  • The Python Launcher for Windows will be installed according to the option at the bottom of the first page

  • The standard library, test suite, launcher and pip will be installed

  • If selected, the install directory will be added to your

  • Shortcuts will only be visible for the current user

Selecting “Customize installation” will allow you to select the features to install, the installation location and other options or post-install actions. To install debugging symbols or binaries, you will need to use this option.

To perform an all-users installation, you should select “Customize installation”. In this case:

  • You may be required to provide administrative credentials or approval

  • Python will be installed into the Program Files directory

  • The Python Launcher for Windows will be installed into the Windows directory

  • Optional features may be selected during installation

  • The standard library can be pre-compiled to bytecode

  • If selected, the install directory will be added to the system

  • Shortcuts are available for all users

3.1.2. Removing the MAX_PATH Limitation¶

Windows historically has limited path lengths to 260 characters. This meant that paths longer than this would not resolve and errors would result.

In the latest versions of Windows, this limitation can be expanded to approximately 32,000 characters. Your administrator will need to activate the “Enable Win32 long paths” group policy, or set the registry value to .

This allows the function, the module and most other path functionality to accept and return paths longer than 260 characters when using strings. (Use of bytes as paths is deprecated on Windows, and this feature is not available when using bytes.)

After changing the above option, no further configuration is required.

Changed in version 3.6: Support for long paths was enabled in Python.

3.1.3. Installing Without UI¶

All of the options available in the installer UI can also be specified from the command line, allowing scripted installers to replicate an installation on many machines without user interaction. These options may also be set without suppressing the UI in order to change some of the defaults.

To completely hide the installer UI and install Python silently, pass the option. To skip past the user interaction but still display progress and errors, pass the option. The option may be passed to immediately begin removing Python - no prompt will be displayed.

All other options are passed as , where the value is usually to disable a feature, to enable a feature, or a path. The full list of available options is shown below.





Perform a system-wide installation.



The installation directory

Selected based on InstallAllUsers


The default installation directory for all-user installs



The default install directory for just-for-me installs

or or


The default custom install directory displayed in the UI



Create file associations if the launcher is also installed.



Compile all files to .



Add install and Scripts directories to and to



Create shortcuts for the interpreter, documentation and IDLE if installed.



Install Python manual



Install debug binaries



Install developer headers and libraries



Install and related files



Install Python Launcher for Windows.



Installs Python Launcher for Windows for all users.



Install standard library and extension modules



Install bundled pip and setuptools



Install debugging symbols (*.pdb)



Install Tcl/Tk support and IDLE



Install standard library test suite



Install utility scripts



Only installs the launcher. This will override most other options.



Disable most install UI



A custom message to display when the simplified install UI is used.


For example, to silently install a default, system-wide Python installation, you could use the following command (from an elevated command prompt):

To allow users to easily install a personal copy of Python without the test suite, you could provide a shortcut with the following command. This will display a simplified initial page and disallow customization:

(Note that omitting the launcher also omits file associations, and is only recommended for per-user installs when there is also a system-wide installation that included the launcher.)

The options listed above can also be provided in a file named alongside the executable. This file specifies a list of options and values. When a value is provided as an attribute, it will be converted to a number if possible. Values provided as element text are always left as strings. This example file sets the same options as the previous example:

python-3.8.0.exe /quiet InstallAllUsers=1 PrependPath=1 Include_test=0
python-3.8.0.exe InstallAllUsers=0 Include_launcher=0 Include_test=0 SimpleInstall=1 SimpleInstallDescription="Just for me, no test suite."
<Options><OptionName="InstallAllUsers"Value="no"/><OptionName="Include_launcher"Value="0"/><OptionName="Include_test"Value="no"/><OptionName="SimpleInstall"Value="yes"/><OptionName="SimpleInstallDescription">Just for me, no test suite</Option></Options>

3.1.4. Installing Without Downloading¶

As some features of Python are not included in the initial installer download, selecting those features may require an internet connection. To avoid this need, all possible components may be downloaded on-demand to create a complete layout that will no longer require an internet connection regardless of the selected features. Note that this download may be bigger than required, but where a large number of installations are going to be performed it is very useful to have a locally cached copy.

Execute the following command from Command Prompt to download all possible required files. Remember to substitute for the actual name of your installer, and to create layouts in their own directories to avoid collisions between files with the same name.

You may also specify the option to hide the progress display.

python-3.8.0.exe /layout [optional target directory]

3.1.5. Modifying an install¶

Once Python has been installed, you can add or remove features through the Programs and Features tool that is part of Windows. Select the Python entry and choose “Uninstall/Change” to open the installer in maintenance mode.

“Modify” allows you to add or remove features by modifying the checkboxes - unchanged checkboxes will not install or remove anything. Some options cannot be changed in this mode, such as the install directory; to modify these, you will need to remove and then reinstall Python completely.

“Repair” will verify all the files that should be installed using the current settings and replace any that have been removed or modified.

“Uninstall” will remove Python entirely, with the exception of the Python Launcher for Windows, which has its own entry in Programs and Features.

3.2. The Microsoft Store package¶

The Microsoft Store package is an easily installable Python interpreter that is intended mainly for interactive use, for example, by students.

To install the package, ensure you have the latest Windows 10 updates and search the Microsoft Store app for “Python 3.8”. Ensure that the app you select is published by the Python Software Foundation, and install it.


Python will always be available for free on the Microsoft Store. If you are asked to pay for it, you have not selected the correct package.

After installation, Python may be launched by finding it in Start. Alternatively, it will be available from any Command Prompt or PowerShell session by typing . Further, pip and IDLE may be used by typing or . IDLE can also be found in Start.

All three commands are also available with version number suffixes, for example, as and as well as (where is the specific version you want to launch, such as 3.8). Open “Manage App Execution Aliases” through Start to select which version of Python is associated with each command. It is recommended to make sure that and are consistent with whichever version of is selected.

Virtual environments can be created with and activated and used as normal.

If you have installed another version of Python and added it to your variable, it will be available as rather than the one from the Microsoft Store. To access the new installation, use or .

The launcher will detect this Python installation, but will prefer installations from the traditional installer.

To remove Python, open Settings and use Apps and Features, or else find Python in Start and right-click to select Uninstall. Uninstalling will remove all packages you installed directly into this Python installation, but will not remove any virtual environments

3.2.1. Known Issues¶

Because of restrictions on Microsoft Store apps, Python scripts may not have full write access to shared locations such as and the registry. Instead, it will write to a private copy. If your scripts must modify the shared locations, you will need to install the full installer.

3.3. The packages¶

The package is a reduced size Python environment intended for use on continuous integration and build systems that do not have a system-wide install of Python. While nuget is “the package manager for .NET”, it also works perfectly fine for packages containing build-time tools.

Visit for the most up-to-date information on using nuget. What follows is a summary that is sufficient for Python developers.

The command line tool may be downloaded directly from , for example, using curl or PowerShell. With the tool, the latest version of Python for 64-bit or 32-bit machines is installed using:

To select a particular version, add a . The output directory may be changed from , and the package will be installed into a subdirectory. By default, the subdirectory is named the same as the package, and without the option this name will include the specific version installed. Inside the subdirectory is a directory that contains the Python installation:

In general, nuget packages are not upgradeable, and newer versions should be installed side-by-side and referenced using the full path. Alternatively, delete the package directory manually and install it again. Many CI systems will do this automatically if they do not preserve files between builds.

Alongside the directory is a directory. This contains a MSBuild properties file that can be used in a C++ project to reference the Python install. Including the settings will automatically use the headers and import libraries in your build.

The package information pages on are for the 64-bit version and for the 32-bit version.

nuget.exe install python -ExcludeVersion -OutputDirectory . nuget.exe install pythonx86 -ExcludeVersion -OutputDirectory .
# Without -ExcludeVersion > .\python.3.5.2\tools\python.exe -V Python 3.5.2 # With -ExcludeVersion > .\python\tools\python.exe -V Python 3.5.2

3.4. The embeddable package¶

The embedded distribution is a ZIP file containing a minimal Python environment. It is intended for acting as part of another application, rather than being directly accessed by end-users.

When extracted, the embedded distribution is (almost) fully isolated from the user’s system, including environment variables, system registry settings, and installed packages. The standard library is included as pre-compiled and optimized files in a ZIP, and , , and are all provided. Tcl/tk (including all dependants, such as Idle), pip and the Python documentation are not included.


The embedded distribution does not include the Microsoft C Runtime and it is the responsibility of the application installer to provide this. The runtime may have already been installed on a user’s system previously or automatically via Windows Update, and can be detected by finding in the system directory.

Third-party packages should be installed by the application installer alongside the embedded distribution. Using pip to manage dependencies as for a regular Python installation is not supported with this distribution, though with some care it may be possible to include and use pip for automatic updates. In general, third-party packages should be treated as part of the application (“vendoring”) so that the developer can ensure compatibility with newer versions before providing updates to users.

The two recommended use cases for this distribution are described below.

3.4.1. Python Application¶

An application written in Python does not necessarily require users to be aware of that fact. The embedded distribution may be used in this case to include a private version of Python in an install package. Depending on how transparent it should be (or conversely, how professional it should appear), there are two options.

Using a specialized executable as a launcher requires some coding, but provides the most transparent experience for users. With a customized launcher, there are no obvious indications that the program is running on Python: icons can be customized, company and version information can be specified, and file associations behave properly. In most cases, a custom launcher should simply be able to call with a hard-coded command line.

The simpler approach is to provide a batch file or generated shortcut that directly calls the or with the required command-line arguments. In this case, the application will appear to be Python and not its actual name, and users may have trouble distinguishing it from other running Python processes or file associations.

With the latter approach, packages should be installed as directories alongside the Python executable to ensure they are available on the path. With the specialized launcher, packages can be located in other locations as there is an opportunity to specify the search path before launching the application.

3.4.2. Embedding Python¶

Applications written in native code often require some form of scripting language, and the embedded Python distribution can be used for this purpose. In general, the majority of the application is in native code, and some part will either invoke or directly use . For either case, extracting the embedded distribution to a subdirectory of the application installation is sufficient to provide a loadable Python interpreter.

As with the application use, packages can be installed to any location as there is an opportunity to specify search paths before initializing the interpreter. Otherwise, there is no fundamental differences between using the embedded distribution and a regular installation.

3.5. Alternative bundles¶

Besides the standard CPython distribution, there are modified packages including additional functionality. The following is a list of popular versions and their key features:


Installer with multi-platform compatibility, documentation, PyWin32


Popular scientific modules (such as numpy, scipy and pandas) and the package manager.


A “comprehensive Python analysis environment” with editors and other development tools.


Windows-specific distribution with prebuilt scientific packages and tools for building packages.

Note that these packages may not include the latest versions of Python or other libraries, and are not maintained or supported by the core Python team.

3.6. Configuring Python¶

To run Python conveniently from a command prompt, you might consider changing some default environment variables in Windows. While the installer provides an option to configure the PATH and PATHEXT variables for you, this is only reliable for a single, system-wide installation. If you regularly use multiple versions of Python, consider using the Python Launcher for Windows.

3.6.1. Excursus: Setting environment variables¶

Windows allows environment variables to be configured permanently at both the User level and the System level, or temporarily in a command prompt.

To temporarily set environment variables, open Command Prompt and use the set command:

These changes will apply to any further commands executed in that console, and will be inherited by any applications started from the console.

Including the variable name within percent signs will expand to the existing value, allowing you to add your new value at either the start or the end. Modifying by adding the directory containing python.exe to the start is a common way to ensure the correct version of Python is launched.

To permanently modify the default environment variables, click Start and search for ‘edit environment variables’, or open System properties, Advanced system settings and click the Environment Variables button. In this dialog, you can add or modify User and System variables. To change System variables, you need non-restricted access to your machine (i.e. Administrator rights).


Windows will concatenate User variables after System variables, which may cause unexpected results when modifying .

The variable is used by all versions of Python 2 and Python 3, so you should not permanently configure this variable unless it only includes code that is compatible with all of your installed Python versions.

C:\>setPATH=C:\Program Files\Python 3.8;%PATH%C:\>setPYTHONPATH=%PYTHONPATH%;C:\My_python_lib C:\>python

3.6.2. Finding the Python executable¶

Besides using the automatically created start menu entry for the Python interpreter, you might want to start Python in the command prompt. The installer has an option to set that up for you.

On the first page of the installer, an option labelled “Add Python to PATH” may be selected to have the installer add the install location into the . The location of the folder is also added. This allows you to type python to run the interpreter, and pip for the package installer. Thus, you can also execute your scripts with command line options, see Command line documentation.

If you don’t enable this option at install time, you can always re-run the installer, select Modify, and enable it. Alternatively, you can manually modify the using the directions in Excursus: Setting environment variables. You need to set your environment variable to include the directory of your Python installation, delimited by a semicolon from other entries. An example variable could look like this (assuming the first two entries already existed):

C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Python 3.8

3.7. UTF-8 mode¶

Windows still uses legacy encodings for the system encoding (the ANSI Code Page). Python uses it for the default encoding of text files (e.g. ).

This may cause issues because UTF-8 is widely used on the internet and most Unix systems, including WSL (Windows Subsystem for Linux).

You can use UTF-8 mode to change the default text encoding to UTF-8. You can enable UTF-8 mode via the command line option, or the environment variable. See for enabling UTF-8 mode, and Excursus: Setting environment variables for how to modify environment variables.

When UTF-8 mode is enabled:

  • returns instead of the system encoding. This function is used for the default text encoding in many places, including , , , etc.

  • , , and all use UTF-8 as their text encoding.

  • You can still use the system encoding via the “mbcs” codec.

Note that adding to the default environment variables will affect all Python 3.7+ applications on your system. If you have any Python 3.7+ applications which rely on the legacy system encoding, it is recommended to set the environment variable temporarily or use the command line option.


Even when UTF-8 mode is disabled, Python uses UTF-8 by default on Windows for:

  • Console I/O including standard I/O (see PEP 528 for details).

  • The filesystem encoding (see PEP 529 for details).

3.8. Python Launcher for Windows¶

The Python launcher for Windows is a utility which aids in locating and executing of different Python versions. It allows scripts (or the command-line) to indicate a preference for a specific Python version, and will locate and execute that version.

Unlike the variable, the launcher will correctly select the most appropriate version of Python. It will prefer per-user installations over system-wide ones, and orders by language version rather than using the most recently installed version.

The launcher was originally specified in PEP 397.

3.8.1. Getting started¶ From the command-line¶

System-wide installations of Python 3.3 and later will put the launcher on your . The launcher is compatible with all available versions of Python, so it does not matter which version is installed. To check that the launcher is available, execute the following command in Command Prompt:

You should find that the latest version of Python you have installed is started - it can be exited as normal, and any additional command-line arguments specified will be sent directly to Python.

If you have multiple versions of Python installed (e.g., 2.7 and 3.8) you will have noticed that Python 3.8 was started - to launch Python 2.7, try the command:

If you want the latest version of Python 2.x you have installed, try the command:

You should find the latest version of Python 2.x starts.

If you see the following error, you do not have the launcher installed:

Per-user installations of Python do not add the launcher to unless the option was selected on installation.

'py' is not recognized as an internal or external command, operable program or batch file. Virtual environments¶

If the launcher is run with no explicit Python version specification, and a virtual environment (created with the standard library module or the external tool) active, the launcher will run the virtual environment’s interpreter rather than the global one. To run the global interpreter, either deactivate the virtual environment, or explicitly specify the global Python version. From a script¶

Let’s create a test Python script - create a file called with the following contents

From the directory in which lives, execute the command:

You should notice the version number of your latest Python 2.x installation is printed. Now try changing the first line to be:

Re-executing the command should now print the latest Python 3.x information. As with the above command-line examples, you can specify a more explicit version qualifier. Assuming you have Python 2.6 installed, try changing the first line to and you should find the 2.6 version information printed.

Note that unlike interactive use, a bare “python” will use the latest version of Python 2.x that you have installed. This is for backward compatibility and for compatibility with Unix, where the command typically refers to Python 2.

#! pythonimportsyssys.stdout.write("hello from Python %s\n"%(sys.version,)) From file associations¶

The launcher should have been associated with Python files (i.e. , , files) when it was installed. This means that when you double-click on one of these files from Windows explorer the launcher will be used, and therefore you can use the same facilities described above to have the script specify the version which should be used.

The key benefit of this is that a single launcher can support multiple Python versions at the same time depending on the contents of the first line.

3.8.2. Shebang Lines¶

If the first line of a script file starts with , it is known as a “shebang” line. Linux and other Unix like operating systems have native support for such lines and they are commonly used on such systems to indicate how a script should be executed. This launcher allows the same facilities to be used with Python scripts on Windows and the examples above demonstrate their use.

To allow shebang lines in Python scripts to be portable between Unix and Windows, this launcher supports a number of ‘virtual’ commands to specify which interpreter to use. The supported virtual commands are:

For example, if the first line of your script starts with

The default Python will be located and used. As many Python scripts written to work on Unix will already have this line, you should find these scripts can be used by the launcher without modification. If you are writing a new script on Windows which you hope will be useful on Unix, you should use one of the shebang lines starting with .

Any of the above virtual commands can be suffixed with an explicit version (either just the major version, or the major and minor version). Furthermore the 32-bit version can be requested by adding “-32” after the minor version. I.e. will request usage of the 32-bit python 2.7.

New in version 3.7: Beginning with python launcher 3.7 it is possible to request 64-bit version by the “-64” suffix. Furthermore it is possible to specify a major and architecture without minor (i.e. ).

The form of shebang line has one further special property. Before looking for installed Python interpreters, this form will search the executable for a Python executable. This corresponds to the behaviour of the Unix program, which performs a search.

3.8.3. Arguments in shebang lines¶

The shebang lines can also specify additional options to be passed to the Python interpreter. For example, if you have a shebang line:

Then Python will be started with the option

3.8.4. Customization¶ Customization via INI files¶

Two .ini files will be searched by the launcher - in the current user’s “application data” directory (i.e. the directory returned by calling the Windows function with ) and in the same directory as the launcher. The same .ini files are used for both the ‘console’ version of the launcher (i.e. py.exe) and for the ‘windows’ version (i.e. pyw.exe).

Customization specified in the “application directory” will have precedence over the one next to the executable, so a user, who may not have write access to the .ini file next to the launcher, can override commands in that global .ini file. Customizing default Python versions¶

In some cases, a version qualifier can be included in a command to dictate which version of Python will be used by the command. A version qualifier starts with a major version number and can optionally be followed by a period (‘.’) and a minor version specifier. Furthermore it is possible to specify if a 32 or 64 bit implementation shall be requested by adding “-32” or “-64”.

For example, a shebang line of has no version qualifier, while has a version qualifier which specifies only a major version.

If no version qualifiers are found in a command, the environment variable can be set to specify the default version qualifier. If it is not set, the default is “3”. The variable can specify any value that may be passed on the command line, such as “3”, “3.7”, “3.7-32” or “3.7-64”. (Note that the “-64” option is only available with the launcher included with Python 3.7 or newer.)

If no minor version qualifiers are found, the environment variable (where is the current major version qualifier as determined above) can be set to specify the full version. If no such option is found, the launcher will enumerate the installed Python versions and use the latest minor release found for the major version, which is likely, although not guaranteed, to be the most recently installed version in that family.

On 64-bit Windows with both 32-bit and 64-bit implementations of the same (major.minor) Python version installed, the 64-bit version will always be preferred. This will be true for both 32-bit and 64-bit implementations of the launcher - a 32-bit launcher will prefer to execute a 64-bit Python installation of the specified version if available. This is so the behavior of the launcher can be predicted knowing only what versions are installed on the PC and without regard to the order in which they were installed (i.e., without knowing whether a 32 or 64-bit version of Python and corresponding launcher was installed last). As noted above, an optional “-32” or “-64” suffix can be used on a version specifier to change this behaviour.


  • If no relevant options are set, the commands and will use the latest Python 2.x version installed and the command will use the latest Python 3.x installed.

  • The commands and will not consult any options at all as the versions are fully specified.

  • If , the commands and will both use the latest installed Python 3 version.

  • If , the command will use the 32-bit implementation of 3.1 whereas the command will use the latest installed Python (PY_PYTHON was not considered at all as a major version was specified.)

  • If and , the commands and will both use specifically 3.1

In addition to environment variables, the same settings can be configured in the .INI file used by the launcher. The section in the INI file is called and the key name will be the same as the environment variables without the leading prefix (and note that the key names in the INI file are case insensitive.) The contents of an environment variable will override things specified in the INI file.

For example:

  • Setting is equivalent to the INI file containing:

  • Setting and is equivalent to the INI file containing:


3.8.5. Diagnostics¶

If an environment variable is set (to any value), the launcher will print diagnostic information to stderr (i.e. to the console). While this information manages to be simultaneously verbose and terse, it should allow you to see what versions of Python were located, why a particular version was chosen and the exact command-line used to execute the target Python.

3.9. Finding modules¶

Python usually stores its library (and thereby your site-packages folder) in the installation directory. So, if you had installed Python to , the default library would reside in and third-party modules should be stored in .

To completely override , create a file with the same name as the DLL () or the executable () and specify one line for each path to add to . The file based on the DLL name overrides the one based on the executable, which allows paths to be restricted for any program loading the runtime if desired.

When the file exists, all registry and environment variables are ignored, isolated mode is enabled, and is not imported unless one line in the file specifies . Blank paths and lines starting with are ignored. Each path may be absolute or relative to the location of the file. Import statements other than to are not permitted, and arbitrary code cannot be specified.

Note that files (without leading underscore) will be processed normally by the module when has been specified.

When no file is found, this is how is populated on Windows:

  • An empty entry is added at the start, which corresponds to the current directory.

  • If the environment variable exists, as described in Environment variables, its entries are added next. Note that on Windows, paths in this variable must be separated by semicolons, to distinguish them from the colon used in drive identifiers ( etc.).

  • Additional “application paths” can be added in the registry as subkeys of under both the and hives. Subkeys which have semicolon-delimited path strings as their default value will cause each path to be added to . (Note that all known installers only use HKLM, so HKCU is typically empty.)

  • If the environment variable is set, it is assumed as “Python Home”. Otherwise, the path of the main Python executable is used to locate a “landmark file” (either or ) to deduce the “Python Home”. If a Python home is found, the relevant sub-directories added to (, , etc) are based on that folder. Otherwise, the core Python path is constructed from the PythonPath stored in the registry.

  • If the Python Home cannot be located, no is specified in the environment, and no registry entries can be found, a default path with relative entries is used (e.g. , etc).

If a file is found alongside the main executable or in the directory one level above the executable, the following variations apply:

  • If is an absolute path and is not set, this path is used instead of the path to the main executable when deducing the home location.

The end result of all this is:

  • When running , or any other .exe in the main Python directory (either an installed version, or directly from the PCbuild directory), the core path is deduced, and the core paths in the registry are ignored. Other “application paths” in the registry are always read.

  • When Python is hosted in another .exe (different directory, embedded via COM, etc), the “Python Home” will not be deduced, so the core path from the registry is used. Other “application paths” in the registry are always read.

  • If Python can’t find its home and there are no registry value (frozen .exe, some very strange installation setup) you get a path with some default, but relative, paths.

For those who want to bundle Python into their application or distribution, the following advice will prevent conflicts with other installations:

  • Include a file alongside your executable containing the directories to include. This will ignore paths listed in the registry and environment variables, and also ignore unless is listed.

  • If you are loading or in your own executable, explicitly call or (at least) before .

  • Clear and/or overwrite and set before launching from your application.

  • If you cannot use the previous suggestions (for example, you are a distribution that allows people to run directly), ensure that the landmark file () exists in your install directory. (Note that it will not be detected inside a ZIP file, but a correctly named ZIP file will be detected instead.)

These will ensure that the files in a system-wide installation will not take precedence over the copy of the standard library bundled with your application. Otherwise, your users may experience problems using your application. Note that the first suggestion is the best, as the others may still be susceptible to non-standard paths in the registry and user site-packages.

Changed in version 3.6:
  • Adds file support and removes option from .

  • Adds as a potential landmark when directly adjacent to the executable.

Deprecated since version 3.6:

Modules specified in the registry under (not ) may be imported by . This finder is enabled on Windows in 3.6.0 and earlier, but may need to be explicitly added to in the future.

3.10. Additional modules¶

Even though Python aims to be portable among all platforms, there are features that are unique to Windows. A couple of modules, both in the standard library and external, and snippets exist to use these features.

The Windows-specific standard modules are documented in MS Windows Specific Services.

3.10.1. PyWin32¶

The PyWin32 module by Mark Hammond is a collection of modules for advanced Windows-specific support. This includes utilities for:

PythonWin is a sample MFC application shipped with PyWin32. It is an embeddable IDE with a built-in debugger.

3.10.2. cx_Freeze¶

cx_Freeze is a extension (see Extending Distutils) which wraps Python scripts into executable Windows programs ( files). When you have done this, you can distribute your application without requiring your users to install Python.

3.10.3. WConio¶

Since Python’s advanced terminal handling layer, , is restricted to Unix-like systems, there is a library exclusive to Windows as well: Windows Console I/O for Python.

WConio is a wrapper for Turbo-C’s , used to create text user interfaces.

3.11. Compiling Python on Windows¶

If you want to compile CPython yourself, first thing you should do is get the source. You can download either the latest release’s source or just grab a fresh checkout.

The source tree contains a build solution and project files for Microsoft Visual Studio 2015, which is the compiler used to build the official Python releases. These files are in the directory.

Check for general information on the build process.

For extension modules, consult Building C and C++ Extensions on Windows.

3.12. Other Platforms¶

With ongoing development of Python, some platforms that used to be supported earlier are no longer supported (due to the lack of users or developers). Check PEP 11 for details on all unsupported platforms.

See Python for Windows for detailed information about platforms with pre-compiled installers.

The objective of this tutorial is to help you set up python on windows OS. If you want to install python 3.6 instead, you might want to check this other tutorial Python 3.6 download and install for windows.

At the time of this writing, the latest stable version of python is, released on October 20th, 2018. This tutorial will assist you in the download and install of python on windows. It is for both 32-bit and 64-bit versions of python. This installation process will automatically install IDLE, pip, and documentation as well and will also create shortcuts and file associations so that you don’t have to set up environment variables after the completion of installation.

Before starting, check if python is already installed on your computer. To do so, open command prompt and type “python” in it. If python is not already installed on your machine, you will see something like:

Install Python 3.7 Windows 10

To download the setup file for python 3.7.1, go to python’s official website and click on Python 3.7.1 under Downloads in the menu bar.

Install Python 3.7 Windows 10

Or, you can directly click on the link below to download the setup file.

Once downloaded, locate the setup file under the name python.exe in the downloads folder and run it. You will see something like:

Install Python 3.7 Windows 10


By default, the Add Python to PATH option is unchecked, make sure it is checked then click on Install Now. If the setup is successful, you should see a window as below:

Install Python 3.7 Windows 10


Let’s check if python is successfully installed now. Open the command prompt and type “python” on it. If you haven’t closed the command prompt from earlier, you will need to close and reopen it. You will see something like:

Install Python 3.7 Windows 10

Check that the python interpreter is working properly through command prompt:

Install Python 3.7 Windows 10

You can also search for IDLE and run python commands via. it.

Install Python 3.7 Windows 10

Python on windows 64-bit version installation

To install the 64-bit version for python 3.7.1 on windows, go to python’s official website and click on Windows under Downloads in the menu bar. You will see something like:

Install Python 3.7 Windows 10

Click on Download Windows X86-64 executable installer.

Or, you can directly click on the link below to download the setup file.

Once downloaded, locate the setup file under the name python-amd64.exe in the downloads folder and run it. Rest of the steps is similar to that of the 32-bit version installation.

I hope this tutorial helped you install Python on Windows.

Install Python 3.7 Windows 10
Recently I had to install Python on Windows 10, so I could use the “Closure Linter” tool for PhpStorm. Here is a simple guide to show you exactly how to install Python and PIP on your Windows 10 machine. Download Python The first step is to download Python from and select the most recent [ ]. 2019 · In this video I an going to show How to Download and Install Python 3.7 on Windows 10. Setting up your Windows 10 System for Python is relatively easy. we Just need to follow some important steps.
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