Find directory based on search string #python

find_dir.py

# This searches for a sequence of characters
import os

def checkForDir(searchDirs, partialOrFullDirNameToFind):
    for searchDir in searchDirs:
        for directory in os.listdir(searchDir):
            if partialOrFullDirNameToFind in directory.lower():
                foundDirectories.append(searchDir + directory)
    return str(foundDirectories[len(foundDirectories)-1])

foundDirectories = [] # This will store any found directories matching the criteria
searchDirs = ['C:/Program Files (x86)/', 'C:/Program Files/'] # List of dirs to check
partialOrFullDirNameToFind = 'djv' # The search string
djv_path = checkForDir(searchDirs, partialOrFullDirNameToFind) + '/bin/djv_view.exe'
print djv_path

# This searches for whole words
import re

def findWholeWord(w):
    return re.compile(r'\b({0})\b'.format(w), flags=re.IGNORECASE).search

findWholeWord('seek')('those who seek shall find')    # Match object
findWholeWord('word')('swordsmith')                   # None