Python callback in a class? -

i found code text summarization in github, , change program became tkinter program.i have problem when value in class using button widget , show result in text widget.how value of method summarize in code use tkinter button?i usualy use function or procedure nothing class , method.this code running in intrepreter.

import nltk nltk.tokenize import sent_tokenize nltk.tokenize import word_tokenize nltk.probability import freqdist  nltk.corpus import stopwords   class naivesummarizer:       def summarize(self, input, num_sentences ):          punt_list=['.',',','!','?']         summ_sentences = []          sentences = sent_tokenize(input)         lowercase_sentences =[sentence.lower()              sentence in sentences]         #print lowercase_sentences          s=list(input)         ts=''.join([ o o in s if not o in  punt_list ]).split()         lowercase_words=[word.lower() word in ts]         words = [word word in lowercase_words if word not in stopwords.words()]         word_frequencies = freqdist(words)          most_frequent_words = [pair[0] pair in              word_frequencies.items()[:100]]                   # add sentences frequent words         word in most_frequent_words:             in range(0, len(lowercase_sentences)):                                 if len(summ_sentences) < num_sentences:                                         if (lowercase_sentences[i] not in summ_sentences , word in lowercase_sentences[i]):                                                 summ_sentences.append(sentences[i])                                                 break           # reorder selected sentences         summ_sentences.sort( lambda s1, s2: input.find(s1) - input.find(s2) )         return " ".join(summ_sentences)   if __name__ == "__main__":      naivesum = naivesummarizer()     text='''     see world in grain of sand,     , heaven in wild flower,     hold infinity in palm of hand,     , eternity in hour.      robin redbreast in cage     puts heaven in rage.      dove-house fill'd doves , pigeons     shudders hell thro' regions.     ''' text2 = '''          conclude aphorism of hippocrates, "qui gravi morbo correpti dolores non sentiunt, mens aegro­tat" (those not perceive wasted seri­ous illness sick in mind), , suggest in need of medicine not conquer malady, more, sharpen senses condition of inner self. fain give answer such deserve, fain reveal myself entirely, not know how set it. hardly know whether still same person whom precious letter addressed.  ''' print(naivesum.summarize(text2,3)) print(naivesum.summarize(text,2)) 

you can not directly use summarize function callback button; instead should wrap function calls summarize , displays result in entry widget.

first, have add text variable widget can read , write text, this:

self.outputvar = stringvar() entry(self, textvariable=self.outputvar) 

now can add callback function button, in your other question, doing this:

def callback(self):     text = "lorem ipsum" # actual input text, maybe widget     num = 3              # proper value whatever     result = self.summarize(text, num) # call summarize     self.outputvar.set(result)         # show results in widget 

alternatively, use text widget; here, inserting text handled differently though.