It's the first time ever for me to use a linux terminal. In my case I activated windows 10 linux subsystem and installed ubuntu because as I have seen it's much more versatile than windows cmd. Now I was trying to create venv for my python project through ubuntu terminal, but i can't undersand why every time i run a command that requires the previous installation of a package such as pip install ... or virtualenv -p python3 venv (which i had already installed time ago through windows cmd) I get
`Command 'virtualenv' not found, but can be installed with:
sudo apt install virtualenv`
and if I run the suggested commands I get:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package virtualenv
In all this my current working directory is the project directory where i intend to place my files, everything worked when i tried to achieve the same result with windows cmd.
Hope what i wrote is clear enough.
Related
I have in windows 10 64 bit installed python 3.9 with site-packages. I would like to install python 3.10.2 on windows 10 64 bit and find a way to install packages automatically in python 3.10.2, the same ones I currently have installed in python 3.9. I am also interested in the answer to this question for windows 11 64 bit.
I upgraded to python 3.10.2 in windows 10 64 bit. To properly install the packages, install the appropriate version of the Microsoft Visual C++ compiler if necessary. Details can be read https://wiki.python.org/moin/WindowsCompilers . With the upgrade to python 3.10.2 from 3.9, it turned out that I had to do it, due to errors that are appearing during the installation of the packages. Before the installing python 3.10.2, type and execute the following command in the windows command prompt:
pip freeze > reqs.txt
This command writes to the reqs.txt file the names of all installed packages in the version suitable for pip. If you run the command prompt with administrator privileges, the reqs.txt file will be saved in the directory C:\WINDOWS\system32.
Then, after the installing of python 3.10.2 and the adding it to the paths in PATH, with the help of the command prompt you need to issue the command:
pip install -r reqs.txt
This will start the installing of the packages in the same versions as for python 3.9. If problems occur, e.g. an installation error appears during the installation of lxml, then you can remove from the regs.txt file the entry with the name of the package whose installation is causing the problem and then install it manually. To edit the reqs.txt file you need the administrator privileges. The easiest way is to run the command prompt in the administrator mode, type reqs.txt and click Enter to edit it.
I decided later to update the missing packages to the latest version, because I suspected that with python 3.10.2 older versions were not compatible.
This means that when upgrading to python 3.10.2 it is worth asking yourself whether it is better to upgrade for all packages. To do this, you can generate the list of the outdated packages using the command:
pip list –-outdated
After the printing of the list in the command prompt, you can upgrade the outdated packages using the command:
pip install --upgrade <package-name>
This can be automated by the editing of the reqs.txt file and the changing of the mark == to > which will speed up the upgrade. The mark > should only be changed for the outdated packages or you will get an error: "Could not find a version that satisfies the requirement ... ".
Supplement to virtual environments:
When you enter a virtual environment directory (in the windows command prompt):, such as D:\python_projects\data_visualization\env\Scripts, type activate to activate it. Then create the reqs.txt file analogous to the description above. Then, copy the file to a temporary directory. After this delete the virtual environment, e.g. using the windows explorator by the deleting of the contents of the env directory. Then, using the version of python in windows of our choice, create a virtual environment using the env directory (see: https://docs.python.org/3/library/venv.html). Copy the regs.txt file to the newly created D:\python_projects\data_visualization\env\Scripts directory. Install site-packages with the support of the regs.txt file as described above.
No you need not reinstall python packages.
conda create --name project-env python=3.x
You can also look at an alternative method to install python versions Install python version
I'm on Windows and want to use the Python package apt_pkg in PyCharm.
On Linux I get the package by doing sudo apt-get install python3-apt but how to install apt_pkg on Windows?
There is no such package on PyPI.
There is no way to run apt-get in Windows; the package format and the supporting infrastructure is very explicitly Debian-specific.
Not quite what you're looking for, but it's possible to use apt-offline on Windows to download the packages. However, you still need a Linux box to generate the sig file.
For example:
python apt-offline set vim-offline.sig --install-packages vim
Will not work:
ERROR: This argument is supported only on Unix like systems with apt installed
However, if you run that command on Linux first, the following command should work on Windows:
python apt-offline get vim-offline.sig -d vim
apt-offline source is available here:
https://github.com/rickysarraf/apt-offline
To build it, simply run:
python setup.py build
python setup.py install
I got it to run with Python 3.8.2 on Windows 10.
Note: in the end of the day, you're just downloading a .deb package and it is simply an ar file containing a tarball and can be extracted with tools like 7-zip. However, if it contains a Linux binary (vim example), there isn't much you can do with it on Windows.
One can use chocolatey the equivalent for windows.
https://chocolatey.org/install
add it to the windows PATH environment
C:\ProgramData\chocolatey\bin
Restart python or anaconda. And is ready to use.
To install packages inside a .py script or a Jupiter notebook, use the syntax below
!choco install [package name]
I am trying to setup object detection tensorflow api on my system by following this tutorial. All the steps work but matplotlib installation is not working. Pip is only collecting the matplotlib and not installing it. However if I install other package like Pandas, it installs properly.
I found a solution on Windows 7 64 Bit (Python 3.7) that worked for me:
Open cmd (console) in Windows. If you are on Windows 10 use powershell and enter cmd in powershell.
Navigate into the "Scripts" folder of your virtual environment using cd. In your example this should be "c:\tensorflow1\models\research\Scripts"
Verify that you are calling the python.exe in this folder (and therefore of this virtual environment) by typing python and hitting enter. Try to import matplotlib. This should not work since the package is not installed yet.
Do not activate the environment.
Use python -m pip install matplotlib to install the package.
I just upgraded to python 3.7 and I realized that all my modules stuck with the previous version. Even Django is not recognised anymore. How can I do to transfer everything to the new version? I am a little lost right now, don't even know where the new version has been installed.
Edit:
When I do $ which python3.6 the terminal tells me it doesn't exist, but I have a python3.6 directory in /usr/local/lib/, where all modules are installed.
In the same directory /usr/local/lib/ I also have a python3.7 directory with some modules installed but many are missing. However when I search for the file python3.7 in my finder it doesn't appear. when I do $ which python3.7 the path is /usr/local/bin so not the same path as the directory.
Anyone sees what happened and knows how I can transfer all modules to python3.7?
Even if the old python version has been removed, it is possible to use the pip of the current python version with the --path option to list all the modules installed in the previous version.
For example, migrating all my user installed python modules from 3.7 to 3.8
pip freeze --path ~/.local/lib/python3.7/site-packages > requirements.txt
pip install --user -r requirements.txt
Incidentally, I always use pip install with --user and leave the system wide installations to the package manager of my linux distro.
It is safer to re-install all packages due to possible compatibility issues:
pip3.6 list | awk '{print $1}' | xargs -I{} pip3.7 install {}
in older version of Python --run the command
pip freeze > requirements.txt
download and install newer version on python.. change the PATH variable to the new version
and run the command
pip install -r requirements.txt
I'm not sure about all modules...but if you want to install a module specifically in python3.7, try this:
python3.7 -m pip install *module_name*
In some cases, we don't have the opportunity to pip freeze in old version--because I've already updated and old version have been purged! There are some measures I've taken to recover some of the packages but I'm NOT sure every package would work with this fix.(e.g. the packages built with wheels)
mv /your/path/to/python3.{6,7}/site-packages/
If the case is packages installed outside venv (in /usr/local/ or ~/.local), reinstall pip with get-pip.py, just to be safe.
If you are recovering a virtualenv. Activate your virtualenv and use my script
Most of your packages should work by now. If anything malfunctions, pip reinstall would works. If you still want it 100% works, pip freeze now.😉
I have an alternative
(Not sure if works outside Windows 10)
I'm currently migrating from 3.7 to 3.8 and the way I found to re-install my previous libraries was by using a script I had that updates all packages via pip install. (Assuming you installed your new Python version as your main version) This checks for all the packages I had and updates/install them in the new Python version.
Note: I prefer to run the script from the command line
Use the file explorer to go to the folder where you have the script;
Click on the path box, write "cmd" and press enter to open a command line from the folder where you are;
Write "python name_of_your_script.py" and press enter to run the command.
The script (adapted from this solution):
import pkg_resources
from subprocess import call
packages = [dist.project_name for dist in pkg_resources.working_set]
[call("pip install " + name + " --upgrade") for name in packages]
I faced a similar problem, now that I upgraded from python 3.7 to python 3.8 (new)
I installed Python 3.8, but the system kept the python37 subfolder with the already installed packages(...\Python37-32\Lib\site-packages) even with the Pyhton38 subfolder created, with the new python.exe.
Usually, it's possible to keep on using the old libraries on your new Python version, because the existent libraries installation folder are already registered in your local computer system path (*).
Even though, I've had problems to use some libraries (some worked in Jupyter Notebook but not in Spyder). I tried the alternatives others proposed to migrate libraries but it did not worked (maybe I did not
So I used brutal force solution.. Not elegant at all, but it worked:
remove the OLD python version folders from the system path or even remove the folder itself for good..
Folders: C:\Users\USERNAME\AppData\Roaming\Python\Python37
C:\Users\USERNAME\AppData\Local\Programs\Python\Python37
Reinstall the packages you need, preferably via Anaconda prompt.
python -mpip install library_name
OR
pip install --user --force-reinstall package_name
OR
pip install --user --force-reinstall package_name == specify_package_version
The libraries will be installed at c:\users\USERNAME\anaconda3\lib\site-packages and recognized by your new python version.
(*) to add the folder to the PATH: System properties --> environment variables --> click "Path"--> edit --> add folder name)
I have downloaded py2app, but the problem is that easy install seems to be an online installation, yet I am installing this on an off-line pc, so can't use easy install. I expected to be able to download an EXE file or MSI file to install it on my PC using a normal procedure to install a Python package, because the python packages that I have installed before have been from self running files.
The downloadable version of Py2app does not include any such self running file. It tells me to type $python setup.py install. Where do I type this? Into what command line?
If you're running Windows (and it seems that you're) you will need to go to the Run window (Win + R) and...
type cmd
type python setup.py install
...to begin the instalation.
If you doesn't have Python on your PATH, the use:
C:\PythonXY\python.exe setup.py install (for example, in Python 2.7 use C:\Python27\python.exe setup.py install).
Also maybe you need to specify the setup.py path so you should do:
C:\PythonXY\python.exe C:\Some\Path\setup.py install.
If you're running any Linux distro then just open the terminal and type that command.
Hope it helps!
You need to download an install the following packages (in this order):
altgraph
macholib
modulegraph
py2app
All of them can be installed by first downloading and extracting the archive and then run "python setup.py install" with the current working directory set to the directory containing the setup.py file.
However... You appear to want to install py2app on a Windows PC, and that won't work because py2app does not support Windows (it cannot cross "compile" a Mac application bundle).