Question

Write a python program that calculates the average number of words per sentence in the input text file. every sentence ends with a period (when, in reality, sentences can end with !, ", ?, etc.) and the average number of sentences per paragraph, where a paragraph is any number of sentences followed by a blank line or by the end of the text.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

Note: Please maintain proper code spacing (indentation), just copy the code part and paste it in your compiler/IDE directly, no modifications required.

#code

#reading name of file from user
file=input("Enter input file name: ")
#opening file, assuming file exists
file=open(file)
#declaring number of words, sentences and paragraphs to 0
words=0
sentences=0
paragraphs=0
#reading all lines from file to a list
lines=file.readlines()
#closing file
file.close()
#looping through each index in lines list
for i in range(len(lines)):
    #removing the newline char from end of current line
    line=lines[i].strip()
    #checking if line is empty (blank line)
    if line=='':
        #incrementing number of paragraphs
        paragraphs+=1
    else:
        #splitting the line into a list of words by space or tab
        words_in_line=line.split()
        #looping through each word in resultant list
        for w in words_in_line:
            #incrementing words count
            words+=1
            #if word ends with a period, incrementing sentences
            if w.endswith('.'):
                sentences+=1
        #if this is the last line and line is not empty (end of text),
        #incrementing paragraphs
        if i==len(lines)-1:
            paragraphs+=1

#at the end, if any field is 0, displaying that the file is empty
if paragraphs==0 or words==0 or sentences==0:
    print("Empty file!")
else:
    #otherwise finding the average words per sentence
    avg_words_per_sentence=words/sentences
    #and average sentences per paragraph
    avg_sentences_per_paragraph=sentences/paragraphs
    #displaying results
    print("Average number of words per sentence:",avg_words_per_sentence)
    print("Average number of sentences per paragraph:", avg_sentences_per_paragraph)

#output

#screenshot of inp.txt file used in this program