in debian based Linux i am trying to uninstall a package installed by pip but for removing it after search it says it will only uninstall it in virtual environment after install virtualenv and upgrading it to version 15.0.3 i run command
virtualenv --no-site-packages /usr
then error occured that it is being run by interpreter and please use system python to execute the script
then i changed the python version via -p flag to python3 then it says the same msg that already using the python3 interpreter i also used simple python version still no luck
i trolled the stackoverflow & google but got no valid answer
Finally after searching and experimenting a lot I just owerwrited the new version of twisted by downloading the old one some of the files it did not deleted however all packages in the system started using newly downloaded old version of twisted!
Related
Right now I'm trying to install python (3.10) and all further installations on my new pc (windows 10) and so far everything is set up:
Python installed
Windows paths for "Python" & "Python\Scrips"
I am able to call the python and pip version and also install some packages. But after installing virtualenv and creating one the - at the moment - unfixable error appears: I am unable to install packages into the pip-path of the virtualenviroment itself. Whenever I'm trying to run any pip-command I'm getting the following error:
Unable to create process using 'C:\Users\ExampleUser\AppData\Local\Programs\Python\Python310\python.exe "C:\folder\env\Scripts\pip.exe" '
As you can see, it's always refering to the original python-path, but on the other hand it's refering to the pip-path of the virtualenv!? Don't know if it's helpful, but when typing in where python and where pip the paths inside the venv are the first one listed. I've also watched out for no blank spaces in my path...
Unfortunately no explanation out there could help me until now and I never faced this problem on my old machine - mostly the same, except some older version of python, pip and virtualenv.
Does anyone else has an idea what I am missing?
downloading Python 3 at the official website and installing it via express installation
Copy & Paste the standalone python into the /python folder and overwriting the python version
running python -m pip install --upgrade pip in cmd
Now pip and python 3 are installed in their latest version.
It's work for me
Could you use venv to create your virtual environment, instead of virtualenv (given that venv is the recommended way to create virtual environments for Python 3.3, and newer)?
If using venv is an option, this procedure may give you some idea on how to do it.
I have not done any Python development on Windows, but I think the basics would be:
python3 -m venv your-env-directory
your-env-directory\Scripts\activate.bat
If using venv is not an option, maybe you can try specifying the -v flag when running your virtualenv command to increase verbosity so you can further troubleshoot what's going on.
try upgrade pip version python -m pip install --upgrade pip
[ Sorry if this answer turns out to be more of a comment than an answer. I only have 21 reputation, so I cannot comment ]
When trying to install pip packages and run python files, is the CWD (Current Working Directory) C:\folder\env\Scripts? If so, try chaning your CWD to C:\folder. I had a similar problem and doing this fixed it.
You may need to look into a cygwin environment, and look into a chroot or jail environment to run the application without conflict.
Have you tried to use virtualenv-wrapper-win module.
It helps me a lot to manage virtual envs
Life is much easier using Anaconda 3 (it's definitely bloated compared to normal Python though), or use the minimal Miniconda (barebone install, basically just Python + a package manager). You can download it here: https://docs.conda.io/en/latest/miniconda.html#windows-installers
Then you can make a new virtual environment super easy:
conda create -n myenv pip
conda activate
If you have multiple environments you do: conda activate [environment_name]
Now you're in your new environment with pip installed. And you get drop down menus in the Windows menu to get to your new environment too, so there isn't any searching required. They just appear. Now if you want to link Jupyter Notebook or Spyder to the installation, it takes more steps since you need more packages. I used this guide which basically activates Jupyter first, then Spyder IDE. https://medium.com/#apremgeorge/using-conda-python-environments-with-spyder-ide-and-jupyter-notebooks-in-windows-4e0a905aaac5
Since you created the environment with pip added you can pip install whatever packages you need. I had to do this recently with OpenBLAS backed NumPy and SciPy (the defaults from pip, not from conda). Now Miniconda is the closest thing to basic Python installation, and comes with some nice tools to make your life easier. Hopefully this is helpful.
I've been using Python 2.7.10 in a virtualenv environment for a couple of months.
Yesterday, activating the environment went fine, but today suddently I get this cryptic error when trying to start Python from Terminal:
Illegal instruction: 4
I have made no changes to my environment (AFAIK), so I'm having a difficult time trying to come to terms with what this error is and what caused it.
Python works fine outside of this virtualenv environment. When running via /usr/local/bin it presents no problem.
I've had this problem a number of times now. While I can't say for certain what the actual issue is, I believe it basically means that some file(s) in the virtualenv installment of Python have become corrupted.
I keep my virtual environment in a synced Dropbox folder, so that may be a large contributor to the issue.
Restoring the virtual environment from a back-up archive worked for me. Or simply reinstall an identical virtual environment.
First, try activating the faulty environment by cd <path/to/old_env> and source /bin/activate.
If it's successfully activated, cd to an accessible location on the drive and run pip freeze > requirements.txt to export a list of currently installed Python modules.
Delete the old environment.
Install a new virtual environment of the latest version of Python 2 that you have on the computer, via virtualenv <path/new_env>
Or, if you want to use a specific Python version, first make sure you have you have it on your drive, and then do virtualenv -p <path>. Assuming that you have downloaded the Python version with Homebrew, e.g.: virtualenv -p /usr/local/bin/python2.6 <path/new_env>
Activate the virtual environment via cd <path/new_env> and then do source /bin/activate.
Assuming that you kept a list of modules to reinstall by previously doing pip freeze > requirements.txt, cd to the folder where the text file is located and do pip install -r requirements.txt.
Otherwise, reinstall the modules with pip manually.
I had same problem and found solution by uninstalling psycopg2 and installing older version. As I understood my comp was not supporting some commands in new version
I recently cleaned up my system variables and I think I might have mixed something up. I have two versions of Python installed: 3.4 and 3.6.2. One is situated in C:/Python3.4 and the other one in AppData folder. I wanted to use Python 3.6.2 and virtualenv again to create another working environment, but I get the following error:
Fatal error in launcher: Unable to create process using '"'
If I try using pip, everything works fine and virtualenv is installed.
Happenned to me today.
I solved it by uninstalling python and installing Python x86 in C:\Python\Python37_32 FOR ALL USERS
Then I've added C:\Python\Python37_32 and C:\Python\Python37_32\Scripts to the PATH env variable.
Then using cmd I installed virtualenv with pip install virtualenv.
After that virtualenv worked like a charm.
Hope this helps
I tried almost all measures I can search on Google. But I solved this issue by re-install certifi pip install certifi
I have installed Python 2.7, pip and virtualenv on my computer and I have created a virtual environment with this same version of Python. I installed some packages in this new virtual environment too.
Later, I decided to install Python 3.6 on the same computer to create a virtual environment that works with version 3.6. I downloaded Python 3.6 and installed it by selecting Add Python 3.6 to PATH and Install for All users and I selected the option to automatically install pip. As I had previously installed virtualenv, I have not had to reinstall it. Should I?
The problem is that, once installed, when creating a virtual environment I've got an error.
As I already had a version of Python installed I have specified that I want to use Python 3.6 in the virtual environment that I am creating:
virtualenv env2_py36 -p c: \ Python36 \ python.exe
The error already says that this usually happens when you install more than one version of Python on the same computer and warns that it is necessary to check the option Install for All Users to work (as I did) and also recommends placing the appropiate PythonXX.dll file in the Scripts folder of the virtual environment. However, I see that there is already a python36.dll file there.
Could anybody tell me what should I do to fix this problem?
On the other hand, I had previously created another virtual environment using Python 2.7. I use PyScripter to run my scripts but I don't know how to connect PyScripter to my virtual environment. It's still connected to the Python2.7's system installation.
This works for me:
virtualenv --python=python3.6 yourenvname
(3.6 is the current latest version of Python, but you can use whichever version you'd like.)
I'm using the most recent versions of all software (Django, Python, virtualenv, MySQLdb) and I can't get this to work. When I run "import MySQLdb" in the python prompt from outside of the virtualenv, it works, inside it says "ImportError: No module named MySQLdb".
I'm trying to learn Python and Linux web development. I know that it's easiest to use SQLLite, but I want to learn how to develop larger-scale applications comparable to what I can do in .NET. I've read every blog post on Google and every post here on StackOverflow and they all suggest that I run "sudo pip install mysql-python" but it just says "Requirement already satisfied: mysql-python in /usr/lib/pymodules/python2.7"
Any help would be appreciated! I'm stuck over here and don't want to throw in the towel and just go back to doing this on Microsoft technologies because I can't even get a basic dev environment up and running.
If you have created the virtualenv with the --no-site-packages switch (the default), then system-wide installed additions such as MySQLdb are not included in the virtual environment packages.
You need to install MySQLdb with the pip command installed with the virtualenv. Either activate the virtualenv with the bin/activate script, or use bin/pip from within the virtualenv to install the MySQLdb library locally as well.
Alternatively, create a new virtualenv with system site-packages included by using the --system-site-package switch.
source $ENV_PATH/bin/activate
pip uninstall MySQL-python
pip install MySQL-python
this worked for me.
I went through same problem, but using pip from virtualenv didn't solve the problem as I got this error
error: could not delete '/Library/Python/2.7/site-packages/_mysql.so': Permission denied
Earlier I had installed the package by sudo pip install mysql-python
To solve, copy files /Library/Python/2.7/site-packages/MySQL_python-1.2.5-py2.7.egg-info and /Library/Python/2.7/site-packages/_mysql* to ~/v/lib/python-2.7/site-packages and include /usr/local/mysql/lib in DYLD_LIBRARY_PATH env variable.
For the second step I am doing export DYLD_LIBRARY_PATH=/usr/local/mysql/lib in ~/.profile