Finding default mutables in Python via Sublime Text

gistfile1.md

Matches all defs, including multi-line defs:

def\s+\w+\(((?!\):).|\n)+\):

Matches all instances of ={ and =[:

=(\[|\{)

Matches all defs, including multi-line defs, containing ={ and =[:

def\s+\w+\(((?!\):)=(\[|\{)|\n)+\):

Possibly better, but absolutely horrendous:

def\s\w+\((?!\):).*(\w*=(\[|\{|\())+(?!\):).*\):