What is pip's equivalent of `npm install package --save-dev`?

Question

In nodejs, I can do npm install package --save-dev to save the installed package into the package.

How do I achieve the same thing in Python package manager

Answer 1

How about make a shell function to do this ? Add below code to your ~/.profile or ~/.bashrc

pips() {
    local pkg=$1

    if [ -z "$1" ]; then
        echo "usage: pips "
        return 1
    fi

    local _ins="pip install $pkg"
    eval $_ins
    pip freeze | grep $pkg -i >> requirements.txt
}

then run source ~/.profile or source ~/.bashrc to import it to your current terminal

when you want to install && save a package, just run, for example pips requests. after package was installed, its version will be save into requirements.txt in your current directory.