In python, when i write a method more than one time into the main, only the last called method is working and the other ones are not. why?

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Here is some part of code. displayKMostFrequentNGramsInFile method reads a file and finds and prints the K most repeated words.

# this is our main function
def main():

 # make sure the user gave us a file to read
 if len(sys.argv) != 2:
  print "need one argument! (file to read from)"
  sys.exit(-1)
 filename = sys.argv[1]


displayKMostFrequentNGramsInFile(20,3,filename) #this method isn't seen
displayKMostFrequentNGramsInFile(30,2,filename) #this method isn't seen
displayKMostFrequentNGramsInFile(15,4,filename) #only this works


main()
showMemTime('at the end')    

asked 39 secs ago

user3183745

3

In python, when i write a method more than one time into the main, only the last called method is working and the other ones are not. why?