Homebrew python3 installation error

Question

I was trying to install python 3 using Homebrew by doing brew install python3 and there was the warning.

Warning: The post-install step did not complete successfully You can try again using brew postinstall python3

So I did instead do brew postinstall python3

```==> /usr/local/Cellar/python3/3.4.1/bin/python3 -m ensurepip --upgrade dyld: Library not loaded: @@HOMEBREW_CELLAR@@/python3/3.4.1/Frameworks/Python.framework/Versions/3.4/Python Referenced from: /usr/local/Cellar/python3/3.4.1/bin/python3 Reason: image not found xcrun: error: active developer path ("/Users/dorislee/Desktop/Macintosh HD/Applications/Xcode.app/Contents/Developer") does not exist, use xcode-select to change xcrun: error: active developer path ("/Users/dorislee/Desktop/Macintosh HD/Applications/Xcode.app/Contents/Developer") does not exist, use xcode-select to change

READ THIS: https://github.com/Homebrew/homebrew/wiki/troubleshooting```

I am not really sure what to do, is there a way to undo this and fix it?

Answer 1

You can try and uninstall brew remove python3 and then do brew cleanup and brew prune and then reinstall python3 brew install python3 with whatever flags you want.

Answer 2

Check your PYTHONPATH variable, clean it, and then try to install python3 anagin

Answer 3

I am pretty sure it is a bug from bottle installation. Sometimes you may not have the opportunity to replace @@HOMEBREW_CELLAR@@ with /usr/local/Cellar because the binary is compiled than scripted. My suggestion is to report the bug to GitHub and wait for the next bottle or compile it by yourself.