Question

Use python

letter_starting_most_unique_words( ) – does not take any input parameters and returns the letter that starts maximum number of unique words in the datafile.

covid1.txt

COVID-19 is a serious health threat, and the situation is evolving daily. The risk will vary between and within communities, but given the increasing number of cases in Canada, the risk to Canadians is considered high.

This does not mean that all Canadians will get the disease. It means that there is already a significant impact on our health care system. If we do not flatten the epidemic curve now, the increase of COVID-19 cases could impact health care resources available to Canadians.

There is an increased risk of more severe outcomes for Canadians aged 65 and over, with compromised immune systems
and with underlying medical conditions. There are also increased health risks for Canadian travellers abroad.

covid2.txt

In The Face Of Coronavirus, Canadians Are Stepping Up To Help.

In any situation, no matter how dire, people will try to help.

As the rates of coronavirus continue to surge, many Canadians are gripped with panic. But across the country, there are people who are jumping into action to help wherever they can.

For someX, the choice to help came last week, when local food banks made the announcement that they were almost out of supplies. People had already started panic-shopping, taking up most of the local supply of non-perishables and toilet paper, leaving little for the community’s most vulnerable, who rely on food banks.

A store started offering a promotion, offering free earrings to anyone who dropped off a food donation. It did not take long for the idea to take off. Another person offered to help seniors pick up groceries, medicine, or other essentials.

For someY, the decision to help came from the realization that she did not really know a lot of her neighbours. As someone who knew she was young and healthy, she wanted to provide support to the people around her who were more vulnerable, but did not have a clear sense of who those people were.

sample output:

covid1: ['c', 13]

covid2:   ['s', 14]

Answer 1

Here is the code (with comments explaining the logic):

def letter_starting_most_unique_words(): ""returns the letter that starts maximum number of unique words in the datafile''! 00vuW NP. # ask the user for the name of the file filename = input("Enter the name of the file: "); # open the file with open(filename) as f: # read the file and save all the words in the file words = f.read().split # create a set named unique_word unique_word = set() 16 17 # loop through all the words, and add them to the set for word in words: # make sure to use casefold() method on each word # this is to make sure that all words are checked # in a way so that capital letters in the word dont matter unique_word.add(word.casefold()), 20 21 # create a dictionary to count the frequency of all first letters first_letter_counter = {} 24 25 26 27 # loop through all the unique words, # and count the frequencies of all the first letters for word in unique_word: letter = word [0] if letter in first letter_counter: first_letter_counter[letter] += 1 else: first_letter_counter[letter] = 1 29 30 32 36 37 # iterate through the dictionary of all the first letter frequencies # and find the max frequency max_count = 0 for letter, count in first_letter_counter.items(): if count >= max_count: max_count = count max_letter = letter # return the required letter with its count return [max_letter, max_count] 46 47 # call the function and print it's output print(letter_starting_most_unique_words()),

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Here is the output:

> python3 word_counter.py Enter the name of the file: covid1.txt ['c', 13] » python3 word_counter.py Enter the name of the file: covid2.txt ['s', 14]

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Here is the same code (Without comments, for better readability):

| def letter_starting_most_unique_words(): "''returns the letter that starts maximum number of unique words in the datafile'' filename = input("Enter the name of the file: ") ovo U W NP with open(filename) as f: words = f.read().split(), 10 'unique_word = set(), for word in words: unique_word.add(word.casefold () ), 11 12 13 14 15 16 first_letter_counter = {} for word in unique_word: letter = word [0] if letter in first_letter_counter: first_letter_counter[letter] += 1 else: first_letter_counter[letter] = 1 17 18 19 20 21 23 max_count = 0 for letter, count in first_letter_counter.items(): if count >= max_count: max_count = count max_letter = letter 24 25 26 21 return [max_letter, max_count] 28 29 30 print(letter_starting_most_unique_words ());

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Here is the same code (available to copy-paste onto your compiler/text-editor for testing):
(Kindly follow the indentation by referring to the screenshots provided above)

 def letter_starting_most_unique_words(): '''returns the letter that starts maximum number of unique words in the datafile''' filename = input("Enter the name of the file: ") with open(filename) as f: words = f.read().split() unique_word = set() for word in words: unique_word.add(word.casefold()) first_letter_counter = {} for word in unique_word: letter = word[0] if letter in first_letter_counter: first_letter_counter[letter] += 1 else: first_letter_counter[letter] = 1 max_count = 0 for letter, count in first_letter_counter.items(): if count >= max_count: max_count = count max_letter = letter return [max_letter, max_count] print(letter_starting_most_unique_words()) 

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