def worker(queue):
    while True:
        if not queue.empty():
            words = 'BananA'
            words1 = 'nut'
            words2 = 'KreMA'
            words3 = 'KIVI'
            words4 = 'TesT'
            process(data, words, words1, words2, words3, words4)
def process(data, words, words1, words2, words3, words4):
    if (search != words):
        print("Words Not Found")
    if (words in search or words1 in search or words2 in search or words3 in search or words4 in search):
        print("Words Found  : " + str(Words) + "\n")
        file = open("finded.txt","a")
        file.write("Words Founds "+ str(words)
        file.close()
but, if change the line if "banana" to "Banana"
the code not work, I need Banana or BANANA or BaNaNa get equal, and get true,
 
    