Develop Reference

Why does repair python return "Can't write to file" even though i have access to the specified directory? [duplicate]

I am trying to install Python 2.7 (64 bit) on Windows 10. In the middle of the installation, a window pops up saying:
Error writing to file C:\Python27\pythonw.exe. Verify that you have
access to that directory
How can I resolve this issue and install Python?

This error is normally encountered when the installer does not have admin rights for the drive/folder you are installing to. I also noticed that you are installing to drive C:
Here are a couple of things for you to try.
Open the installer program by right-clicking, and then selecting "Run as Administrator".
Depending on how you have your PC set up you may not have permission to install on drive C:
If this is a work computer, talk to your IT department. Otherwise, seriously consider using different drives to keep your OS and your applications separated.

I encountered a similar issue while installing Python 2.7.11 on Windows 7 (64bit). Here is how I solved the error.
Note down the path mentioned in the error.
Do not close the error message. i.e. Do not press "Retry" or "Cancel", let it be there.
Go to the directory mentioned in step-1.
Try to create a new folder or text file in this directory.
You will get an error message saying "The Disc Structure is Corrupted and Unreadable". This is the real issue which is causing the Python installation to fail.
Run Command Prompt as an administrator and enter the command: Chkdsk \f C:
Either it will start checking the disc or it will ask you to select if you want to check disc next time you boot-up your machine. Select Yes and restart your machine.
A disc check will be performed, which may take 5-10 minutes.
Now you can install Python without any issue.

I had the same problem , this is how I solved the error :
click on cancel
go to c:\
create a new folder and call it python or python3
run the python install as administrator and choose the new folder that you just created
as directory where it should be installed
et voila !

Your Windows 10 version may not be activated. So many administrator features are locked in inactivated Windows10 version.
So try to open CMD in administrator mode and run following command to ignore the activation message.
slmgr -rearm
Now you can install fresh version of python with pythonw.exe features.

Right Click The running Uninstaller. Then Right Click Python 3.9.1 64-bit as shown below in the picture. ( I have Python 3.9.1. You can do it in any Uninstaller) Now it will repair without any errors. ^_^

Running Pymol on Windows from .whl install

I've managed to install pymol on windows following the instructions here and using the file Pmw‑2.0.1‑py2‑none‑any.whl from here
Various folders have appeared in C:\Users\Python27\Lib\site-packages (Pmw and Pmw-2.0.1.dist-info). However, I can't actually work out how to run pymol.
It used to be provided as a .exe format which could just be run in the usual way for windows applications. The folders that have installed just contain lots of python scripts, but I can't find anything which actually launches the programme.

That's probably not the official way but it works :)
Download both the appropriate pymol and pymol-launcher file.
Install pymol via pip
change file extention of pymol-launcher to .zip (or unzip it straight)
get pymol.exe and make sure to have either pymol##.dll (## is your version number) in your path or in the same directory

Did it work for you?
I took another approach. NOTE! I am using Anaconda2 (python 2.7.13) under Windows 8.1
First download the appropriate files from http://www.lfd.uci.edu/~gohlke/pythonlibs/#pymol
Pmw-2.0.1-py2-none-any.whl
pymol-1.8.6.1-cp27-cp27m-win_am d64.whl
pymol_launcher-1.0-cp27-cp27m-win_amd64.whl
Start Command Prompt (Admin) via right-click on windows start button and navigate to your python installation directory
Enter the following lines (adapt to your installation of python)
C:\Users\David\Anaconda2>Scripts\pip.exe install Pmw-2.0.1-py2-none-any.whl
C:\Users\David\Anaconda2>Scripts\pip.exe install pymol-1.8.6.1-cp27-cp27m-win_am d64.whl
C:\Users\David\Anaconda2>Scripts\pip.exe install pymol_launcher-1.0-cp27-cp27m-win_amd64.whl
Now just launch pymol via pymol.exe that was created in the same directory.

Using linux console in pycharm

I'm new to pycharm, virtualenv, linux and git.
I've recently begun a journey of using djangoto make webapps. Before I used sublime to make scripts however now a more complex project management system such as pycarm was needed. I actually wanted to get a linux VM and go down that road but was advised that windows python IDE such as pycharm would be suitable
I recently learnt the importance of dependencies and how to use virtualenv. However in this tutorial, under the 'How do I use my shiny new virtual environment?' it starts using commands such as:
ls env
and
which python
Neither of which my pycharm console would understand.
I could use a console emulator such cmder to use the commands but then I would remove the convience of using the IDE's integrated one.
Should I upgrade to a linux VM ? Or can I install a package that allows me to use such commands in PyCharm.
As a bonus question, what are the commands in that tutorial ? are they linux commands? when ever i see $ .... is that the linux console ?

You can accomplish this using Vagrant: https://www.vagrantup.com/
You can use Vagrant and VirtualBox to setup a Linux VM (distro of your choice) and then install all of your Python dependencies in the VM. Once you have that setup, you can tell PyCharm to use the Python interpreter in your VM by following these steps:
Open the project settings dialog box in PyCharm.
Expand Project: (your project name) on the left side.
Click on Project Interpreter.
Click on the cog icon on the upper right side of the window and select Add Remote.
Click on the Vagrant radio button.
In the Vagrant Instance Folder box, select the directory your Vagrantfile is located in.
In the Vagrant Host URL box, make sure ssh://vagrant#127.0.0.1:2222 is specified.
Click OK.
Since Vagrant is compatible with Windows this solution should work for you. I have done it successfully using macOS and it works great. Good luck!
You might find this tutorial useful: https://developer.rackspace.com/blog/a-tutorial-on-application-development-using-vagrant-with-the-pycharm-ide/

I got this to work on Windows 10 with Anaconda Prompt. This terminal which comes with Anaconda, creates a "base" environment with a linux-like virtual machine and your Windows file system (C:\\) mounted to /c, and has bash installed with common Unix commands like cd, ls, chmod, echo, cat, ... Running programs from bash with access to environment variables is much nicer than Windows Powershell etc.
Now to get your Terminal in Pycharm to use Anaconda Prompt instead of cmd.exe, I followed this answer. After installing Anaconda and/or Anaconda Prompt, right-click -> Open File Location -> right-click the shortcut -> Properties -> copy file path. Then use your file path instead.
Conda is great for package environment management. Learn more about it here. For Django + Conda specifically, read here. You can also use pip to install from Python package indexes, github repos, and requirements.txt files instead. Unless you know how Anaconda Prompt works, I don't recommend creating your own environments from scratch. What worked for me was:
(base) C:\Users\wassadamo> conda create -n mynewenvironment --copy base
...
(base) C:\Users\wassadamo> conda activate mynewenvironment
(mynewenvironment) C:\Users\wassadamo> ls
folderA folderB file.txt
Works!
Whenever I try running conda deactivate to leave the base environment, my bash commands would stop working. So clone base as above.
Another tip: if you want to run shell scripts from Terminal within PyCharm with Anaconda Prompt this way, then execute them (e.g. "run.sh") on command line with
bash run.sh
I tried putting this on the first line of my run.sh
#!/usr/bin/bash
And running it with
./run.sh
But this had the effect of running it in an external Anaconda Prompt instance (add sleep, or some user input command to force it to wait and see for yourself). Explicitly running my .sh files with bash had the desired effect of running them in the same shell as I started them in PyCharm Terminal configured with Anaconda Prompt.

bash on Ubuntu on windows Linux, folder recognition, and running Python scripts

I'm new to Linux. I recently downloaded Bash on Ubuntu on Windows 10 (after the Anniversary edition update to Windows 10). Since this update is relatively new, there is not much online regarding troubleshooting. There are two things I need help on:
(1) When I go to the home folder, which seems to be "C:\Users\user\AppData\Local\lxss\home\user" and I add a new folder through Windows, this folder does not show up in Linux with the "ls" command. But when I add a directory using "mkdir" in Linux, the "ls" command shows this folder. Why is it behaving like this? Am I limited to creating folders through "mkdir" when working in this folder?
(2) I have a Python script sitting in that same folder that I'm trying to run and again it is not being found by Linux or the Python interpreter started in Bash on Ubuntu on Windows. I have Python 3 installed (Anaconda) and I'm able to type commands directly in the Python interpreter and it's working. However, I would like to run scripts in files.
Please let me know if more information is needed. Thanks.

The reason why ls is not showing anything is that it shows the Linux directory structure. Try setting it to the Windows directory, in this example the c drive:
cd /mnt/c
Does ls show a folder structure now?

Looks like you are having permissions issues.
To see everything on your home folder try
ls -al
to change permissions check out the chmod command

How about using Python for Windows and NotePad++ to edit and run your Python scripts?
https://www.python.org/ftp/python/3.5.2/python-3.5.2-amd64.exe
You can setup NotePad++ as described here.
How to Execute a Python File in Notepad ++?
(I ended up using Cloud9 https://c9.io/ for Python. It is independent of your local environment or OS)

I installed Python 3.4.3 over 3.4.2 on Windows 7... and now I cannot uninstall Python

I installed Python 3.4.3 over 3.4.2 on Windows 7 and got problems with IDLE not starting.
When I use the Windows uninstaller via the control panel I get the message:
"There is a problem with this Windows Installer package a program required for this install to complete could not be run. Contact your support personnel or package vendor."
If I try to remove Python via the msi file then I get the same message.
There is no Python34 directory on my machine. I noticed that there is an entry in the registry HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\3.4\Modules. I didn't want to mess with my registry, but can I safely delete this entry? Is there any more to delete?

I used MicrosoftFixit.ProgramInstallUninstall and I was able to remove Python34 and then it reinstalled without any problems.

Had a similar problem. This is what I did:
Restart computer (kill any running processes of Python)
Delete the main Python folder under C drive.
Using CCleaner (or a similar application), use the Tools -> Uninstall feature to remove Python (if it is still there after deleting the folder)
Then go to the Registry window in CCleaner and clean the registry. Python should now be completely gone from your computer.