Conda is the default package and environment management tool shipped with Anaconda.
This post logs my cheatsheet and notes for working with virtual environments with conda.
conda create -n my_envconda env listconda env remove -n my_envconda activate my_envsource activate my_envconda deactivate my_envsource deactivate my_envOutside an env, we can use the -n option to specify which environment we want
to install packages into:
conda install -n my_env -c some_channel some_packageIf we are inside the virtual environment, there is no need to use the -n
option. We can install a package with conda install.
Remove pakcage from an env: conda remove -n my_env some_package. If you do
not specify -n, some_package in current env will be removed. If you are not
in any virtual env, some_package in the global Python path will be removed.
When I am inside a virtual env, I am surprised that pip install some_package
installs the package to the global site-package instead of inside the virtual
env.
After some digging, I find that reason is that I was not using the pip command
inside that virtual environment. To check this, use the following command
before using pip install:
which pipIf the pip path is not inside the virtual env, then we are using the
system-wide pip. So pip install some_package will install some_package into
to global Python path instead of the virtual environment.
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