It has started appearing ever since I installed Anaconda on my PC. It doesn't affect anything and when I press "Ok" it goes away. But it is quite annoying and I would like to know the reason. It has only appeared when I try to run a development server in Django or try to install python modules using pip. Is there any way to solve this?
It happens because anacondaa3\Library\bin\ in this folder pythondicom39.dll has crashed you need to replace it with a new file
Yes, that dll file might be corrupted. Just replace, and then try it. You can download the pythoncom39.dll files from the following link
https://freeonlinestudies.com/python-dlls/
Today when I tried to run simple code on Sublime Text 3, the following message appeared:
Python was not found but can be installed from the Microsoft Store: https://go.microsoft.com/fwlink?linkID=2082640
And when I type Python in CMD, it opens the Windows Store for me to download Python 3.7. This problem started today for no good reason. I didn't change or download anything about Python and already tried reinstalling Python, and the Path environment variable is correct.
Use the Windows search bar to find "Manage app execution aliases". There should be two aliases for Python. Unselect them, and this will allow the usual Python aliases "python" and "python3". See the image below.
I think we have this problem when installing Python because in a new Windows installation the aliases are in the ON position as in image below. When turned on, Windows puts an empty or fake file named python.exe and python3.exe in the directory named %USERPROFILE%\AppData\Local\Microsoft\WindowsApps. This is the alias.
Then Microsoft put that directory at the top of the list in the "Path" environment variables.
When you enter "python" in cmd, it searches the directories listed in your "Path" environment variables page from top to bottom. So if you installed Python after a new Windows 10 install then get redirected to the Windows Store, it's because there are two python.exe's: The alias in the App Execution Alias page, and the real one wherever you installed Python. But cmd finds the App execution, alias python.exe, first because that directory is at the top of the Path.
I think the easiest solution is to just check the python.exe and python3.exe to OFF as I suggested before, which deletes the fake EXE file files. Based on this Microsoft Devblog, they stated they created this system partially for new Python users, specifically kids learning Python in school that had trouble installing it.
Creating this alias was to help kids just starting Python to install it and focus on learning to code. I think Windows probably deletes those aliases if you install Python from the Windows App Store. We are noticing that they do not get deleted if you manually install from another source.
(Also, the empty/fake python.exe is not really empty. It says 0 KB in the screenshot, but entering "start ms-windows-store:" in cmd opens the Windows App Store, so it probably just has a line with that and a way to direct it to the Python page.)
Finally, as Chipjust suggested, you can create a new alias for Python using something like DOSKEY as explained in this article for example:
How to set aliases for the command prompt in Windows
The main problem here is that the order in the path calls the windows from top to bottom, and that there is python.exe in %USERPROFILE%\AppData\Local\Microsoft\WindowsApps which is called first if there are no other python.exes in the PATH above that line.
To ensure that the correct python.exe is called, add the Python interpreter installation folder (containing python.exe) to the PATH, above %USERPROFILE%\AppData\Local\Microsoft\WindowsApps
Here is an example:
To get to this location, click "Start" → start typing "Env" → Select "Edit the system environment variables" → "Environment variables" button → Select the entry for "Path" in the upper list → Click "Edit".
Python components should be at the top, as in step 5. If not, move them up by pressing the button in step 6.
If the Python interpreter is already installed, then go to Apps & features from settings, select Python, and then select modify.
Again select modify and select Next:
Then this window will appear:
Select "add Python to environment variable" and click on the install button. Then again go to apps & features, click modify and click Repair.
Now go to CMD and type Python.
Problem solved.
This is a PowerShell script that does the magic.
Remove-Item $env:USERPROFILE\AppData\Local\Microsoft\WindowsApps\python*.exe
I had problems with this as well, where Windows didn't recognize Python or Anaconda in a double click or cmd (command) prompt.
Problem: unable to import libraries in "python" cmd in Windows. Instead the Windows "python" cmd took users somewhere they don't want to go.
Problem Cause: In Windows "Environmental Variables", Windows adds a python.exe and python3.exe (I don't know where these link to) in the "%USERPROFILE%\AppData\Local\Microsoft\WindowsApps" directory.
Solution: I tried deleting the python*.exe files in the WindowsApp directory, but Windows wouldn't allow it, so I opened a command prompt in the "%USERPROFILE%\AppData\Local\Microsoft\WindowsApps" directory and typed:
del python.exe
del python3.exe
Then I created an environment variable linking to the installed Python interpreter link. In my case, it was C:\Anaconda3; C:\Anaconda3\Scripts, and some others for good measure.
Because this is a common issue and this appears to be the canonical question, I want to try to give a complete overview of The Python 3.7 Windows Store Fiasco (TM).
Why is it possible for this to happen?
A convergence of two things: the previous introduction of the Python Launcher for Windows in 2011 (hereafter py), and a Windows 10 update in May 2019 that was apparently intended to make installing Python easier for Windows users.
Oops. Turns out that installation path isn't great; it bypasses the "lengthy" setup wizard... which contains some options that some users find very useful. It caused other issues, too. Not to mention that it just works in slightly non-standard ways, has limitations on file system access because it's a Store app, initially couldn't itself be launched by py....
Okay, but why do those factors result in the problem?
Since the introduction of py, by default, Windows Python installers do not add the new Python install to the PATH. Why? Because the entire point of py is that it uses its own logic to find a Python installation, based on some combination of command-line switches and possibly the source file's own shebang line. Now your source files can be associated with py instead of any particular python.exe, and you can get Linux-like behaviour when double-clicking a file. Meanwhile, by running py at the command line, you have easy access to whatever you need, and you don't have to think about which version of Python was installed most recently. So there's seemingly no good reason to put any of those Python installations on the PATH. It only risks confusing you when, for example, the most recently installed version isn't the most up-to-date one. Right?
In the update, Windows 10 put a "python.exe" into a Windows Apps-related folder, which is a wrapper app to open a Microsoft Store link. The idea is that it's on the PATH, but way near the end; so if you have an installed Python, it gets used, and otherwise the wrapper is invoked and helpfully prompts you to install Python - so that you can actually run that random, totally trusted .py file your friend sent you on Discord.
And it would work perfectly, if your installed Python were on the PATH.
Oops.
(But, you know, py had been introduced around 8 years prior. You'd think someone at Microsoft would have been aware of the potential issue. Maybe instead of a special shortcut link, they could have made an actual script that checks for the presence of C:\Windows\py.exe or something.)
So what are my options?
You can check the option to add new Python versions to the PATH when you install them, and deal with the fact that python at the command line means a specific one of them. If you need to change that, you can manually tweak your PATH variable.
You can just manually tweak the PATH variable after the fact. (or "Modify" a Python installation to fix it.) This is covered in several other answers.
Independently of that, you can disable the wrappers, as shown in the top answer. You should probably do this anyway; seeing python fail at the command line is less aggravating than dealing with a random GUI window popping up and offering to install something for you, especially when you know you have it already.
If you want to keep the PATH empty, consider using virtual environments for your projects. Whenever a virtual environment is active, the PATH is temporarily modified such that python means the Python installation of that environment. It's quite convenient, really.
You might be able to tell your IDEs to use py instead of a specific Python installation, and it might even be helpful to do so. I don't know. I don't use one.
As a person who does Python development in Sublime Text, I know you said the Python interpreter path was correct, but when you install the Python interpreter make sure to tick the option to add Python to PATH.
I had the same issue back in the day till I did this.
You can manually add Python to the Windows path by doing this:
Start the Run box and enter sysdm.cpl
Go to the Advanced tab and click the Environment Variables button
Now you’ll need to locate the relevant Python paths
Here is how a Python application path looks like:
And this is how a Python Scripts path looks like:
Select the Path variable, press edit and add both paths (Python application and Python Scripts)
If it doesn't show, press new instead of edit and fill the New User Variable box
This is how my Variable value looks like:
C:\Users\Ron\AppData\Local\Programs\Python\Python37-32;C:\Users\Ron\AppData\Local\Programs\Python\Python37-32\Scripts
That’s it! You just added Python to the Windows Path.
Source: Data To Fish
So, I had the same problem.
My answer was to add python to PATH not only for User variables, it was there, but also for System variables. And now everything works.
So, I've got the same problem in VENV.
I solved it by typing >> python**.exe**
But to add every time .exe a little bit nervous.
Also try to type python.exe in cmd.
This is an additional note for anyone using pyenv-win: after turning off the application execution aliases, run pyenv rehash. You may also need to close/reopen your CMD or PowerShell window.
I have put together a powershell snippet, which reorders WindowsApps and Python folder so that Python is first. Run this as Admin:
$appsFld="$env:USERPROFILE\AppData\Local\Microsoft\WindowsApps";
$pyPath=(Resolve-Path "$env:USERPROFILE\AppData\Local\Programs\Python\Python*\")
$Env:Path = (($Env:Path.Split(';') | Where-Object { $_ -ne "$appsFld" }) -join ';');
$Env:Path = (($Env:Path.Split(';') | Where-Object { $_ -ne "$pyPath" }) -join ';');
$Env:Path += ";$pyPath";
$Env:Path +=";$appsFld";
[Environment]::SetEnvironmentVariable("PATH", "$Env:Path", "Machine")
Then I can run python just fine:
> python
Python 3.10.7 (tags/v3.10.7:6cc6b13, Sep 5 2022, 14:08:36) [MSC v.1933 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> quit
Adding a bit to the question. Even when I typed pip freeze, it wasn't showing anything.
Here's what I did:
There were multiple instances for the Python application in /AppData/Local/Microsoft/WindowApps.
I deleted those and then it worked.
This question already has answers here:
"python" not recognized as a command
(14 answers)
Closed 2 years ago.
This is a really annoying problem. I've prowled the web for solutions, but all I found was tips about changing the PATH variable, which I did, of course. My Python install directory is C:\Python27. It' a 32 bit version. Whenever I type python in the command prompt, it says that it isn't recognised as an internal or external command. Currently, my PATH variable is set to C:\Python27;C:\Python27\Lib\site-packages\;C:\Python27\Scripts. Anyone has any ideas? I run Windows 7 by the way (64 bit). I'm pretty desperate. Heck, if nothing works I guess I'll try dual-booting Linux and Windows 7...
Just adding the Python path and trying again worked for me (without reboot).
MS-dos command for Python 2.7:
set PATH=%PATH%;C:\python27\
MS-dos command for Python 3.3:
set PATH=%PATH%;C:\python33\
(check if that is the folder where you installed Python).
Quick fix: May not be the most elegant or long term fix but if you are really frustrated and just want to get it to run, just copy paste the python.exe file to your current directory. This worked for me.
After adding the python folder to the system PATH variable, you should reboot your computer.
Another simple solution is: create a shortcut of the python.exe executable (probably it is in C:\Python27\python.exe, or similar) in a place like C:\Windows\system32 (that is, a place that already is listed in the PATH variable). The name of your shortcut should be python (maybe python.exe should work too). I mean, it can't be python - shortcut or similar, for your purposes.
To see the contents of the PATH variable, go to the cmd and enter set PATH.
After changing the PATH variable in windows, you need to reboot your system before it takes effect.
Edit: As stated by #tdelaney, only a restart of cmd.exe should be required. This is true atleast for Windows 7 64bit.
In your PATH have you got a leading space before your Python path?
For example:
"C:\somedirectory\bin; C:\Python27;C:\Python27\Lib\site-packages\;C:\Python27\Scripts"
If you have a leading space between path's "ry\bin; C:\Pyt", it won't work and is usually the cause for this type of issue.
When installing, there is a checkbox that is by default not selected, but it asks to add python to the environment variable. Re-install and check that box.
I'd rather the installer do it than struggle in the weeds myself.
Okay, as you said your Python install directory is C:\Python27, open my computer, then open c: drive,
if you don't see "Python27" named folder there then try to search it using search option, (in my case i found it in old.window folder, don't know how it moved there) cut and past it in c drive along with folders like, program files, user etc... , now open cmd and type python and hit enter to check if it is working now,
This is only a partial answer, but I found (repeatedly) that I'd have similar issues when I would use the gui installer and not go through the custom setup.
Using the custom setup option, then using the same settings, the "install for all users" (that then installs to C://python.version/blah instead of the user based default structure) WOULD allow the installer to setup PATH correctly.
I'll preface this question by saying that I've barely used python before, and never before on Mac OS, so I am fully ready to accept that I'm probably doing something rather silly!
I've been sent two python projects, one of which I need to run. When I open the project I'm interested in (in TextWrangler), and run, I get the following error:
context.py:16: ImportError: No module named fetch_command
Well.. fetch_command is a module in the other program, which is in the same directory (/Users/myname) as the program that I am trying to run. The (scant documentation for the applications suggests:
"I wouldn't try installing into your python installation dirs,
I'd install to some home directory or prefix and set up your
PYTHONPATH and PATH (or use virtualenv)"
and so I have tried (and succeeded - I've tested by calling echo $PATH and echo $PYTHONPATH) adding Users/myname to PATH and PYTHONPATH. This did nothing. I then tried adding /Users/myname/other_python_app/src to PATH and PYTHONPATH, but this also hasn't worked. Anyone know what I'm doing wrong..?
Thanks a lot in advance!
Ah, I understand the issue now. It's not that you can't find it in your Python project, but rather in your text editor. There should be a menu entry to set your PYTHONPATH from within TextWrangler (I tried looking for the documentation but the site seems to be down). Oftentimes, these editors don't respect the PYTHONPATH variable or do so only on restart.
This is a bit of a hack in your case, but try adding an empty file __init__.py so Python knows that this directory contains a module.
I have a batch file that runs a python script. When the python script is invoked, it starts a second windows console and then disappears when it is completed. This is a problem because I am editing the PYTHONPATH environment variable in the batch file, but because the python script is running in a second window, it cannot see the edited PYTHONPATH environment variable. It used to work just fine (everything would run in the same windows console). I just installed Vista SP2 and this problem showed up. Any thoughts on how to fix what might be broken?
Thanks.
Have you tried changing the extension of the python script to .pyw, or just invoke it with pythonw.exe?
It could be that the .py filetype is associated to pythonw.exe, therefore causing it to open in a new process. Find any .py file, right click it, select properties, and check to see under "Opens with:" what the default interpreter is.
Ok, so I decided to reinstall python. If I uninstall and reinstall (I was using the windows installer) in the default location, it seems to have no effect. I cleaned out the registry and reinstalled. Still no different. However, if I install python in a different location (other than the default) it seems to run fine. Something is obviously corrupt somewhere, but I don't know where. So I am going to just reinstall all of my other modules in a different location and go from there.
Thank you all for your responses.