Question

Write a program that reads whitespace delimited strings (words) and an integer (freq). Then, the program outputs the strings from words that have a frequency equal to freq in a case insensitive manner. Your specific task is to write a function words Frequency(words, freq), which will return a list of strings (in the order in which they appear in the original list) that have a frequency same as the function parameter freq. The parameter words to the function words Frequency(words, freq) should be a list data structure. If two strings in the list words contain the same sequence of characters but are different case, they are considered the same. For example, we will consider the strings UCONN and uconn to be the same.

Answer 1

Answer:

See explaination for the code

Explanation:

def wordsOfFrequency(words, freq):

d = {}

res = []

for i in range(len(words)):

if(words[i].lower() in d):

d[words[i].lower()] = d[words[i].lower()] + 1

else:

d[words[i].lower()] = 1

for word in words:

if d[word.lower()]==freq:

res.append(word)

return res

Note:

First a dictionary is created to keep the count of the lowercase form of each word.

Then, using another for loop, each word count is matched with the freq, if it matches, the word is appended to the result list res.

Finally the res list is appended.