sort

"""
for line in file:
    print line
"""
def word_map(string):
    word_dict = {}
    for word in string.split():
        word = filter(str.isalnum, word).lower()
        word = word.strip()
        if word != '':
            if word in word_dict.keys():
                word_dict[word] +=1
            else:
                word_dict[word] = 1
    return word_dict
"""
my_dict= word_map("This is a string , this is another string too")
for k in my_dict:
    print k, my_dict[k]
"""
file = open("story.txt", "r")
file_string = file.read()

words = word_map(file_string)
popular_words = sorted(words, key=words.get, reverse=True)
for k in popular_words:
    print k, popular_words[k]


/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 /Users/mona/PycharmProjects/PythonCodes/top_words.py
the
Traceback (most recent call last):
  File "/Users/mona/PycharmProjects/PythonCodes/top_words.py", line 27, in <module>
    print k, popular_words[k]
TypeError: list indices must be integers, not str

Process finished with exit code 1