Yesterday I wanted to use HTML-CSS-JS Prettify on my Sublime Text, and it didn’t work. I opened the console and I saw this:

AttributeError: 'MacOSXOSAScript' object has no attribute 'basename'.

Oh but? It wasn’t the first time I had this error and I didn’t know why: on Firefox, and on MkDocs.

So where does this bug come from? It comes from webbrowser python lib.

You just have to start $ python -c 'import webbrowser; webbrowser.open("http://kud.io")' to get it.

See the tracelog:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/webbrowser.py", line 669, in <module>
    cmd = _synthesize(cmdline, -1)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/webbrowser.py", line 94, in _synthesize
    if controller and name.lower() == controller.basename:
AttributeError: 'MacOSXOSAScript' object has no attribute 'basename'

And why do you get that so? Because you defined the BROWSER environment variable, like this for instance:

export FIREFOXNIGHTLY_BIN="/Applications/FirefoxNightly.app/Contents/MacOS/firefox"
export BROWSER=$FIREFOXNIGHTLY_BIN

It’s already logged and will be fixed but for the moment either you patch your webbrowser.py or you comment the export of BROWSER.