Elpy: Use elpy with Python3

[panregedit]

I use brew to install Python3 on my Mac, and use (setq elpy-rpc-python-command "python3") to set the RPC Python to Python3. This works will when I use the emacs installed through brew. But When I switch to the emacs I download from http://emacsformacosx.com, it get an error like this:
eldoc error: (error Can't find Python command, configure `elpy-rpc-python-command')
elpy-config like this:
Virtualenv........: None
RPC Python........: python3 (not found)
Interactive Python: python (/usr/bin/python)
Emacs.............: 24.5.1
Elpy..............: Not found (Python), 1.11.0 (Emacs Lisp)
Jedi..............: Not found
Rope..............: Not found
Importmagic.......: Not found
Autopep8..........: Not found
Yapf..............: Not found
Syntax checker....: Not found (pyflakes)
And when I try to open this same app through command line, it works fine.

[jorgenschaefer]

Hello, and thanks for the report! It looks like Emacs can not find the python3 executable in your PATH. If you are starting Emacs from the GUI, but it works in a terminal, it's likely that your shell setup sets PATH correctly, but the desktop environment does not.

You can either configure Mac OS X correctly (I do not know how, though), or use the exec-path-from-shell package to work around this problem.

Does this solve the issue for you?

[panregedit]

I have tried the exec-path-from-shell, an it perfectly solve my problem. Thank you!