import os, re

dirHome = os.path.expanduser('~')
nameDirPlugin = "plug-ins"
l_dirPlugin = []
mask = r".*gimp.[0-9]+\.[0-9]+%s%s" % ( os.sep, nameDirPlugin )
for root, dirs, files in os.walk( dirHome ):
  if re.match( mask, root, re.IGNORECASE):
    l_dirPlugin.append( root )

print l_dirPlugin