酿造python与未酿造的ipython

Question

I installed python via brew, and made it my default python. If I run which python , I obtain /usr/local/bin/python . Also pip is installed via brew, which pip returns /usr/local/bin/pip .

I do not remember how I installed ipython, but I didn't do it via brew, since when I type which ipython , I obtain /opt/local/bin/ipython . Is it the OS X version of ipython?

I installed all libraries on this version of ipython, for example I have matplotlib on ipython but not on python. I do not want to re-install everything again on the brew python, rather continue to install libraries on this version of ipython. How can I install new libraries there? For example, Python Image Library, or libjpeg?

If possible, I would like an exhaustive answer so to understand my problem, and not just a quick fix tip.

Answer 1

I installed python via brew , and made it my default python. If I run which python , I obtain /usr/local/bin/python .

Okay, good so far.

Also pip is installed via brew , which pip returns /usr/local/bin/pip .

Actually, not quite brew install python would have installed pip because even doing brew search pip comes up with this warning.

If you meant "pip" precisely:

Homebrew provides pip via: `brew install python`. However you will then
have two Pythons installed on your Mac, so alternatively you can install
pip via the instructions at:
  https://pip.readthedocs.io/en/stable/installing/

So, Python came with pip, not brew install

when I type which ipython , I obtain /opt/local/bin/ipython . Is it the OSX version of ipython?

There is no "OSX version of ipython"...

I installed all libraries on this version of ipython, for example I have matplotlib on ipython but not on python.

You actually did install them to your brew installed Python. IPython is not a new installation of Python.

You can even start a python interpreter from the terminal and import matplotlib to check this

I do not want to re-install everything again on the brew python

What exactly needs re-installed? It's already installed into the brew python

Answer 2

To transfer all your packages you can use pip to freeze all of your packages installed in ipython and then install them all easily from the file that you put them in.

pip freeze > requirements.txt

then to install them from the file pip install -r requirements.txt

I'm not entirely sure if I understood what you're asking so if this isn't what you want to do please tell me.

Answer 3

OK, so I solved by uninstalling macport (and so the ipython I was using, which was under /opt/local/bin) and installing ipython via pip. Then I re-install what I needed (eg jupyter) via pip.