Question

In python please.

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 wordsOfFreqency(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 wordsOfFreqency(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.

Test cases 1-4

Example 1:

Input:

unus duo Duo tres Tres tRes
1

Output:

unus

Example 2:

Input:

unus duo Duo tres Tres tRes
2

Output:

duo
Duo

Example 3: Input:

unus Duo duo tres Tres tRes
2

Output:

Duo
duo

Compare Example 3 and Example 4. Note that the order of the output strings Duo, duo is the same as they appeared in the input.

Example 4: Input:

tres Tres tRes Duo duo unus 
2

Output:

Duo
duo

For simplicity, you can assume that there will be only one distinct string for each frequency. That means, the input will NOT be like this.

unus duo Duo two Two tres Tres tRes
2

Hint: For this lab, you may need to use the dictionary data structure and a string method.

For Fun (Optional): Try adding the following statement at the end of your code, run the code, and see what does it print.

print(wordsOfFreqency.__doc__)

Answer 1

Python Code:

def wordsOfFreqency(words, freq):
   """ Function that reads series of words and an integer and returns list of words with the given frequency """
   # Dictionary that holds the word and frequency
   wordDict = {}
  
   # Iterating over each word
   for word in words:
       # Checking for existence
       if word.lower() in wordDict.keys():
           # Incrementing count
           wordDict[word.lower()] += 1
       # Adding a new key
       else:
           wordDict[word.lower()] = 1
      
   # List that holds the result
   res = []
      
   # Comparing each word with freq
   for word in words:
       # Comparing frequency
       if wordDict[word.lower()] == freq:
           res.append(word)
  
   # Returning list
   return res
          
  
def main():
   """ Reading input from user and calling function """
   # Reading input
   ip = input("\nEnter your input: ")
  
   # Forming list of words and frequency
   words = []
  
   # Splitting and iterating over input
   fields = ip.strip().split()
   words = fields[:-1]
   freq = int(fields[-1])
  
   # Calling function
   res = wordsOfFreqency(words, freq)
  
   print("\nResult: ", end="")
  
   # Printing result
   for word in res:
       print(word, end=" ")
  
   print("\n")
      
  
# Calling main function
main()

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Code Screenshot:

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