I am working on a project in python on a Debian 8 VM. To work on the project further I need to install matplotlib 1.5.1. When I attempt to upgrade the current version (obtained through apt-get) or install I am told that I need freetype and png. When I go to install freetype using this link:
http://www.linuxfromscratch.org/blfs/view/svn/general/freetype2.html
After installing and entering the proper commands, I go to try to install matplotlib again and receive the same error.
I tried to install Anaconda3 because it comes with freetype and basically every package that I need for my project. But after running the .sh file I was unable to change my python to use anaconda as the interpreter. How can I do this?
Thanks!
[UPDATE]
I am having to go into my anaconda3 file, then run source bin/activate ~/anaconda3/ Is there anyway to create an alias that would do all this?
You have to first create a conda python environment:
/path/to/conda/bin/conda create --name myenv python=3
(see http://conda.pydata.org/docs/using/envs.html)
When the environment has been created you simply activate it as follows:
/path/to/conda/bin/source activate myenv
Thereafter the system will run python from the conda environment you specified and not from the standard location.
Related
I am pretty new to python. Just been working through some online tutorials on udemy. I seem to have an issue with pip installing modules.
I've tried reinstalling them.
Upgrading my python version.
In VS I always just get module not found.
If I do it in the cmd prompt this is what I get below.
You are currently working on the base environment of your computer. For safety, you can first create a new virtual environment with
python3 -m venv -n new_env
So that you won't corrupt any default installations. Then, activate it with
source new_env/bin/activate
And update the pip and setuptools with
pip3 install --upgrade pip
pip3 install --upgrade setuptools
Finally, install numpy via
pip3 install numpy
However, I would recommend using Anaconda to build your virtual environment. When you install Anaconda and make sure it is included in the path of your terminal, all you need to type is
conda create -n new_env python=3.7 numpy
and it will automatically build the wheel for numpy. Here, "new_env" is just an example for a virtual environment name, and Python version 3.7 is also an example.
You can then, activate this conda environment by
conda activate new_env
To use this virtual environment, which you built either with "venv" or "conda", you should locate and activate this environment from the project interpreter settings in VS .
Finally, I would also recommend considering Pycharm IDE which can also help you with creating a virtual environment and installing packages in it.
It seems that you already have the packages installed. Using VS, please, be sure that you selected the correct Python interpreter (https://code.visualstudio.com/docs/python/environments)
I know there are some similar questions,but it is really hard for me to finish it.
I'm trying to create a virtualenv with python 3.7.7 in windows.
I have a downloaded python 3.7.7
C:\Users\willi\AppData\Local\Programs\Python\python-3.7.8-embed-amd64
Since I can built a virtualenv using:
python3 -m venv myenv
So I tried to modify it ,so that it can match specific python version:
python3 -m C:\Users\willi\AppData\Local\Programs\Python\python-3.7.8-embed-amd64\python.exe myenv
But it failed:
ModuleNotFoundError: No module named 'C:\\Users\\willi\\AppData\\Local\\Programs\\Python\\python-3')
Any friends can teach me how to build a virtualenv with python 3.7.7?
I think you haven't installed virtual environment in your local python
pip install virtualenv
and follow your steps. Stil, find the error. Try doing below methods, I think you will get your answer-
in command prompt
pip install virtualenv
go to the location, where you want to create your environment
cd location
virtualenv project_env_name
Now, you will find a python env in the desired location, Then go to scripts
cd project_env_name/scripts
activate
You will enter the environment you created. while leaving the environment, do
deactivate
To leave the environment.
This method works if you want to create the same python version environment as python version in your machine.
If you want to create an environment of the different version, you need to install the python of that version.
I installed Anaconda3 so I can create environments and install different packages in each environment. But I fail to understand the difference between the Python in
/usr/bin/python
and
/opt/anaconda3/bin/python
I can seem to access Python 3.6.5 Anaconda from both, why is that? And, what is the difference between both?
Furthermore, I would like to install packages to a single Python environment only.
When you are running python in the terminal, it is looking up your default path to your the python command. In this case, anaconda probably put a line in your shell profile specify the path to the anaconda version, which is why you are seeing it in the interpreter when you run python from either directory.
Secondly, you can set up a conda environment to download app specific dependencies without interfering with your default set up by
conda create --name myenv
source activate myenv
conda install packagename
This will install it in the myenv environment only. To deactivate the environment just run
source deactivate
Here is the documentation on that https://conda.io/docs/user-guide/tasks/manage-environments.html
Judging by your path, you are using Linux which comes with python installed. So /usr/bin/python is default and you have installed the other one later.
For the environments use https://conda.io/docs/user-guide/tasks/manage-environments.html to activate the desired environment, then you can pip install or conda install the packages and it will be places safely only in that environment. Note that spyder icon runs the root environment by default and you have to run it from terminal after activating one of the environments.
Edit:
I'm not sure why you want to use cd to change the python version. I suggest use aliases. I guess you are just changing the path but running the same version of the python anyway. Take a look at this question:
Two versions of python on linux. how to make 2.7 the default
I wanted to create a new virtual environment to install new packages. Following worked for me:
Commands are executed in Jupyter Notebook (OS: Ubuntu 16.04 LTS)
Upgrade pip:
!pip install --upgrade pip
Install virtual environment:
!pip install virtualenv
Select version of Python you want to use in new environment:
I wanted to create an environment with Python version 3. Naming it as Python3_xyz:
!virtualenv -p python3 Python3_xyz
After execution, this will create a folder with the same name in the current working directory (i.e. the location where Jupyter notebook is present)
Create a new option with the name of the created environment
And finally, run the following command:
!python -m ipykernel install --user --name=Python3_xyz
This will create a new option with the name Python3_xyz in the menu from where we create a new notebook.
NOTE: One can run above commands from the terminal as well just don't use '!' before the commands.
This question is bit dated, but since I faced a similar issue, what worked for me might help someone!
I did pip install requests from within my conda environment, but failed to import requests even after trying out everything.
What worked for me: run python -m pip install requests or python3 -m pip install requests within you environment. This installed requests successfully for me.
I'm trying to start up a virtual env using virtualenv, am getting this error:
Already using interpreter /Users/pkilcrease/anaconda/bin/python3
Using base prefix '/Users/pkilcrease/anaconda'
New python executable in /Users/pkilcrease/.virtualenvs/bodega/bin/python3
Also creating executable in /Users/pkilcrease/.virtualenvs/bodega/bin/python
ERROR: The executable /Users/pkilcrease/.virtualenvs/bodega/bin/python3 is not functioning
ERROR: It thinks sys.prefix is '/Users/pkilcrease/.virtualenvs' (should be '/Users/pkilcrease/.virtualenvs/bodega')
ERROR: virtualenv is not compatible with this system or executable
The command I am running is mkvirtualenv -a . --no-site-packages --python='which python3' -r requirements.txt bodega
My .bashrc file currently looks like this:
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_SCRIPT=/Users/pkilcrease/anaconda/bin/virtualenvwrapper.sh
source /Users/pkilcrease/anaconda/bin/virtualenvwrapper_lazy.sh
I have the feeling that there is some issue with anaconda and virtualenv which is causing the problem here, but not sure how to remedy that or if it's just a red herring.
If using a conda python executable, use conda create --name {your_venv} python=3 (note there is a virtualenv utility that comes with conda, but still use conda create... to make new virtual env's).
Otherwise, when using a version of python installed by the system package manager, create a virtual env using virtualenv, or preferably using the virtualenvwrapper utility mkvirtualenv. For example on Linux, the "system python" is /usr/bin/python3, /usr/bin/python, /usr/bin/python2, etc. Or, as it's clear you're on MacOS, that would likely be a python installed by brew (homebrew) or port (macports) in /opt or /usr/local. You may have to install virtualenvwrapper in order to get mkvirtualenv (and lsvirtualenv, etc).
In short, if you're using anaconda python, stick with conda utils. Else, if you're keeping your python free & open (as many of your corp IT data centers do), then use any of the various open utils like mkvirtualenv, etc.
Hopefully this may help people still looking at this question, but an easy fix:
conda install -y virtualenv
I've currently got a working installation of the Enthought Python Distribution on my machine that I don't want to necessarily disrupt, but I'd like to look at moving over to Anaconda from Continuum.
I can easily install Anaconda into the virtualenv directory I create, but I'm not sure how to tell that virtualenv to use the anaconda-version of Python. If I was telling my whole system to use it I can alter .bash_profile with something like export PATH="/DIRECTORIES/anaconda/bin:$PATH. Is there a way to do that within a virtualenv?
I just tested the Anaconde 1.6 installer from http://continuum.io/downloads
After downloading, I did:
bash Anaconda-1.6.0-Linux-x86_64.sh
If you take the defaults, you'll end up with a directory anaconda in your home directory, completely separate from your EPD or system Python installation.
To activate the anaconda installation's default environment, do the following:
source $HOME/anaconda/bin/activate ~/anaconda
All Python commands will now come from the default Anaconda environment in $HOME/anaconda, which is itself a kind of a virtual environment. You can create sub-environments with e.g. conda create -n myenv1 ipython scipy, but this is not necessary.
As a side note, you can also use pip (also in $HOME/anaconda/bin) to install PyPI packages into your Anaconda default environment (it has pip installed by default) or any of the sub-environments (in which case you should first install pip into the sub-environment using conda install -n myenv1 pip).
It is possible to install parts of Anaconda manually into an existing virtualenv, but using their installer is by far the easiest way to test and use, without affecting any of your existing Python installations.
When you create your virtualenv use the -p flag to give it the path to the Python executable you want to use:
virtualenv -p /path/to/python-anaconda-version