Am calling functions from a list as follows:

''.join([x() for x in corpus])

A function could be like this:
def findWholeWord(w):
    return re.compile(r'\b({0})\b'.format(w), flags=re.IGNORECASE).search

item = ['ii']
fnval = ['i', 'we', 'cake', 'love', 'time', ]

fadmin = ['admin','give',]
G3 = [one(), two(), three()]
G4 = [four(), five()]
l = []
def testing():    
    while True:
        for c in fnval:            
            if findWholeWord(c)(item[0]):            
                print 'yes'
        for c in fadmin:
            if findWholeWord(c)(item[0]):
                print 'yes admin'
        break


Sometimes the functions return a None value.AM also concerned about the 
function not slowing down the app.
Regards

To avoid this  
<type 'exceptions.TypeError'> 'NoneType' object is not callable

 I want to reply to the user with a statement like  "I can't find an 
answer. Please refresh your question"

How can I do this

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