Python 2.5 Windows
Clotilde Wilks
Execute the following command from Command Prompt to download all possiblerequired files. Remember to substitute python-3.9.0.exe for the actualname of your installer, and to create layouts in their own directories toavoid collisions between files with the same name.
After installation, Python may be launched by finding it in Start.Alternatively, it will be available from any Command Prompt or PowerShellsession by typing python. Further, pip and IDLE may be used by typingpip or idle. IDLE can also be found in Start.
If you have installed another version of Python and added it to yourPATH variable, it will be available as python.exe rather than theone from the Microsoft Store. To access the new installation, usepython3.exe or python3.x.exe.
Alongside the tools directory is a build\native directory. Thiscontains a MSBuild properties file python.props that can be used in aC++ project to reference the Python install. Including the settings willautomatically use the headers and import libraries in your build.
The simpler approach is to provide a batch file or generated shortcut thatdirectly calls the python.exe or pythonw.exe with the requiredcommand-line arguments. In this case, the application will appear to be Pythonand not its actual name, and users may have trouble distinguishing it from otherrunning Python processes or file associations.
Applications written in native code often require some form of scriptinglanguage, and the embedded Python distribution can be used for this purpose. Ingeneral, the majority of the application is in native code, and some part willeither invoke python.exe or directly use python3.dll. For either case,extracting the embedded distribution to a subdirectory of the applicationinstallation is sufficient to provide a loadable Python interpreter.
Including the variable name within percent signs will expand to the existingvalue, allowing you to add your new value at either the start or the end.Modifying PATH by adding the directory containingpython.exe to the start is a common way to ensure the correct versionof Python is launched.
The -x.y argument is the short form of the -V:Company/Tag argument,which allows selecting a specific Python runtime, including those that may havecome from somewhere other than python.org. Any runtime registered by followingPEP 514 will be discoverable. The --list command lists all availableruntimes using the -V: format.
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 explicitversion qualifier. Assuming you have Python 3.7 installed, try changingthe first line to #! python3.7 and you should find the 3.7version information printed.
The /usr/bin/env form of shebang line has one further special property.Before looking for installed Python interpreters, this form will search theexecutable PATH for a Python executable matching the name providedas the first argument. This corresponds to the behaviour of the Unix envprogram, which performs a PATH search.If an executable matching the first argument after the env command cannotbe found, but the argument starts with python, it will be handled asdescribed for the other virtual commands.The environment variable PYLAUNCHER_NO_SEARCH_PATH may be set(to any value) to skip this search of PATH.
If PY_PYTHON=3.7-32, the command python will use the 32-bitimplementation of 3.7 whereas the command python3 will use the latestinstalled Python (PY_PYTHON was not considered at all as a majorversion was specified.)
If you cannot use the previous suggestions (for example, you are adistribution that allows people to run python.exe directly), ensurethat the landmark file (Lib\os.py) exists in your install directory.(Note that it will not be detected inside a ZIP file, but a correctly namedZIP file will be detected instead.)
If you are using Python on Windows for web development, we recommend a different set up for your development environment. Rather than installing directly on Windows, we recommend installing and using Python via the Windows Subsystem for Linux. For help, see: Get started using Python for web development on Windows. If you're interested in automating common tasks on your operating system, see our guide: Get started using Python on Windows for scripting and automation. For some advanced scenarios (like needing to access/modify Python's installed files, make copies of binaries, or use Python DLLs directly), you may want to consider downloading a specific Python release directly from python.org or consider installing an alternative, such as Anaconda, Jython, PyPy, WinPython, IronPython, etc. We only recommend this if you are a more advanced Python programmer with a specific reason for choosing an alternative implementation.
With your PowerShell command line open, enter python to run the Python 3 interpreter. (Some instructions prefer to use the command py or python3, these should also work). You will know that you're successful because a >>> prompt with three greater-than symbols will display.
File associations on my machine (winxp home) are such that a python script is directly opened with the python interpreter. If I double click on a python script a console window runs and every thing is fine - as long as there is no syntax error in the script.
Of course their would be the possibility to manually open a console window and to execute the script by typing python myscript.py but I am sure that there is a more convenient (i.e. "double click based") solution.
I have a python script that processes a folder that's dropped on it. As I add new lines, sometimes I get syntax errors, and I can't view them because the command prompt window closes too quickly. In order to keep the window open after an error, I had to modify rossipedia's code. I needed a way to pass a path to the bat file (drop a folder on it) and make the bat pass that path to the python script. The following does that:
This doesn't work when I use debug.bat. "modules" is a folder that's in the same folder with the python script. When the script is called with debug.bat, the current working directory changes to the dropped file's directory. So, to get the path to "modules", I had to use absolute path:
More details: it does not run because api-ms-win-core-path-l1-1-0.dll is missing (see also bugs.python .org/issue32592, bugs.python .org/issue44656, stackoverflow .com/questions/66718131/software-based-on-python-3-9-is-not-working-on-windows-7)
Since there are very very very few lines of code that prevent python3.9/3.10 to run on Win7, I thought maybe it would be possible to add something like in future versions of 3.10, at the start of the interpreter:
Would it be maybe at least possible to change the installer to not block python installation on windows 7 but instead inform the user that python is not officialy supported on windows 7 and if you wish to use it your are responsible to make it work yourself (with yes/no button)
Because if I want to install python on windows 7, I first have to install 3.8 (because the installer doesnt just copy files, it also sets PATH and some registry keys), then install 3.9 on windows 11, then copy that installation over to windows 7, add nalexandru/api-ms-win-core-path-HACK dll to it and then I can use it, all this because installer refuses to install on windows 7
You can also check the version of Python by opening the IDLE application. Go to Start and enter python in the search bar and then click the IDLE app, for example IDLE (Python 3.10 64-bit).
The system install of Python on macOS is not supported. Instead, a package management system like Homebrew is recommended. To install Python using Homebrew on macOS use brew install python3 at the Terminal prompt.
If the installation was successful, the output window should show the version of Python that you installed.Alternatively, you can use the py -0 command in the VS Code integrated terminal to view the versions of python installed on your machine. The default interpreter is identified by an asterisk (*).
First, we helped the community release their distribution of Python to the Microsoft Store. This version of Python is fully maintained by the community, installs easily on Windows 10, and automatically makes common commands such as python, pip and idle available (as well as equivalents with version numbers python3 and python3.7, for all the commands, just like on Linux).
Finally, with the May 2019 Windows Update, we are completing the picture. While Python continues to remain completely independent from the operating system, every install of Windows will include python and python3 commands that take you directly to the Python store page. We believe that the Microsoft Store package is perfect for users starting out with Python, and given our experience with and participation in the Python community we are pleased to endorse it as the default choice.
But if you have a use case for getting the MSIX file directly so you can sideload it, the best place to share it would be by filing a bug at asking for them to be published as a separate download. They could be made available on python.org as their own download, but the need would have to outweigh the confusion when people download them by mistake and have to figure out what to do with it.
Similar to your batch file, the QGIS install includes a python-qgis batch file which you can use to run scripts with the environment pre-configured. As I've tested on 2.14 LTR my batch file is %OSGEO4W_ROOT%\bin\python-qgis-ltr.bat ( depending on your version your file may not have the ltr part: python-qgis.bat). You should find that calling:%OSGEO4W_ROOT%\bin\python-qgis-ltr getScreenshot.py from a command window will run successfully.
In order to run without the batch file you could try manually setting the environment variables as you have previously, but check against the contents of python-gqis-ltr.bat or python-gqis.bat depending on your version. It's worth noting that when you open the OSGeo4W shell it clears your PATH environment variable - so you will have to reset that if you go this route.
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