#functions
def parseExtension(filename):
    fileextension = filename.split(".")[1]
    return(fileextension)


def countExtension(listParm):

    dictObject = {}

    for item in listParm:

        fileExtension = parseExtension(item)

        if fileExtension in dictObject == True:

            dictObject[fileExtension] = dictObject.get[fileExtension, 0] + 1

        else:

            dictObject[fileExtension] = 1

    keysList = dictObject.keys()

    keysList.sort()


    print(dictObject)


#main
countExtension(["python.exe", "java.exe", "blah.py", "assignment5.doc", "explorer.exe", "junk.py", "assignment6.doc"])