from Tkinter import *

#Highlight function to highlight similar words
def highlight(line,text,linenumber,compare):
    #Create text field for doc1 and co2
    print compare
    text.configure(state='normal')
    text.insert(INSERT, line)
    text.pack()
    text.tag_config('same', background='yellow')

    #Iterate through thte dictionaries to look for key and highlight key based of the value of the key.
    for key, value in compare.iteritems():
        pos = '1.0' # <-- position is resetted to 1 in each iteration
        for i in range(value):
            idx = text.search(key, pos, END) #Uses tkinter text widget search to search for dictionary key in .py file1 and .py file2
            if not idx:
                break
            print "key: " + str(len(key))
            pos = '{}+{}c'.format(idx, len(key))
            text.tag_add('same', idx, pos)