pip or pip3 to install packages for Python 3?
I have a Macbook with OS X El Captain. I think that Python 2.7 comes preinstalled on it. However, I installed Python 3.5 too. When I started using Python 3, I read that if I want to install a package, I should type:
pip3 install some_package
Anyway, now when I use
pip install some_package
I get some_package installed for Python 3. I mean I can import it and use it without problems. Moreover, when I type just pip3 in Terminal, I got this message about the usage:
Usage:
pip <command> [options]
which is the same message I get when I type just pip.
Does it mean that in previos versions, things were different, and now pip and pip3 can be used interchangeably? If so, and for the sake of argument, how can I install packages for Python 2 instead of Python 3?
Answer
Your pip is a soft link to the same executable file path with pip3.
you can use the commands below to check where your pip and pip3 real paths are:
$ ls -l `which pip`
$ ls -l `which pip3`
You may also use the commands below to know more details:
$ pip show pip
$ pip3 show pip
When we install different versions of python, we may create such soft links to
- set default pip to some version.
- make different links for different versions.
It is the same situation with python, python2, python3
More information below if you're interested in how it happens in different cases: