Python Word Counter

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A common task in computer-aided textual analysis is to count the frequency of words in a given text. Your task is to create such a counter that meets the following requirements: 1. [1 point] Define a function "create_list()" that takes an arbitrary string as an input parameter (called "text"), and returns a list of the individual words in the input string. The words returned should be all lowercase, and should have trailing periods, commas, and question marks removed. Other punctuation, including any internal punctuation such as hyphens, should be retained. There should be no whitespace (no newlines, returns, tabs, spaces) in your list of words.  There should also be no empty strings in the returned list. HINT: Look at the split built-in string method. Also, endswith() and string slicing can be used to remove trailing punctuation. Input: "To be, or not to be?" Output: ['to', 'be', 'or', 'not', 'to', 'be'] 2. [1 point] Define a function "tally_words()" that takes a list of strings as input, and returns a dictionary with a key for each unique string in the input list, and a value for each key that is an integer representing the number of occurrences of that string in the input list. HINT: You will need to implement some checking of whether each word is in the dictionary already. Input: ['to', 'be', 'or', 'not', 'to', 'be'] Output: {'to': 2, 'be': 2, 'or': 1, 'not': 1} 3. [1 point] Define a function "sort_by_frequency()" that takes a dictionary as input and returns a list of tuples with the first element is the value and the second element the key from the original dictionary. The resulting list of tuples should be sorted in descending order (so the higher counts come first). For the purpose of this assignment the sorting of tied words is not significant. HINT: Converting to a list of tuples in this form is intended to facilitate the sorting of the list. Look at the rules for how tuples sort naturally. Input: {'to': 2, 'be': 2, 'or': 1, 'not': 1} Output: [(2, 'to'), (2, 'be'), (1, 'or'), (1, 'not')] 4. [1 point] Define a function called "main()" in which you call create_list() on the provided sample text, tally_words() on the resulting list of words, sort_by_frequency on the resulting count dictionary, and finally which loops over the sorted list of tuples, printing each pair in the following form: (2) to (2) be (1) or (1) not 5. [1 point] Define test functions for each of the three processing functions that demonstrate that you have met the requirements for each function.  You do not need a test function for the main() function. Your test functions should be named in the form "test_<function_name>". How to set up and run these tests will be explained in this week's module, Module 3. The file hw1_template.py can be used as a starting point for writing your solution. It provides a framework for setting up your code as well as sample text that can be used for testing.

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