For JS or Python?

For JS, it says "filenameslikethis.js" (https://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml?showone=Naming#Naming)

For Python, it says "lower_with_under.py" (http://google-styleguide.googlecode.com/svn/trunk/pyguide.html?showone=Naming#Naming)

How do you feel about "filenameslikethis.js"? I'm fine making an exception to add underscores or dashes as we prefer.