Question

Create a Mad Libs program that reads in text files and lets the user add their own text anywhere the word ADJECTIVE, NOUN, ADVERB, or VERB appears in the text file. For example, a text file may look like this:

The ADJECTIVE panda walked to the NOUN and then VERB. A nearby NOUN was
unaffected by these events.

The program would find these occurrences and prompt the user to replace them.

Enter an adjective:
silly
Enter a noun:
chandelier
Enter a verb:
screamed
Enter a noun:
pickup truck

The following text file would then be created:

The silly panda walked to the chandelier and then screamed. A nearby pickup
truck was unaffected by these events.

The results should be printed to the screen and saved to a new text file.

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

#code

#a method that takes a word, returns a word with all non alphabetical
#characters removed
def format(word):
    formatted=''
    #appending only alphabets
    for i in word:
        if i.isalpha():
            formatted+=i
    return formatted

if __name__ == '__main__':
    #getting input file name
    input_file_name=input('Enter input file name: ')
    #opening input file in read mode
    input_file=open(input_file_name)
    #reading text of input file
    text=input_file.read()
    #closing input file.
    input_file.close()
    #defininga variable to store the updated text
    updated_text=''
    #creating a list to store the adjectives
    keywords=['ADJECTIVE','NOUN','ADVERB','VERB']
    #looping through each word in text (text is split by white space)
    for word in text.split(' '):
        #assuming the word is not a keyword
        is_keyword=False
        #looping through each keyword
        for temp in keywords:
            #checking if word after formatting equals current keyword
            if format(word)==temp:
                #is a keyword
                is_keyword=True
                #getting characters after keyword, if exists (this can be a period,
                # a comma, question mark or anything)
                suffix=word[len(temp)::]
                #if the keyword is adjective or verb, using 'an' for prompt, else using 'a'
                a_or_an = 'a'
                if temp == 'ADJECTIVE' or temp == 'ADVERB':
                   a_or_an = 'an'
                #asking for replacement word
                replacement = input('Enter ' + a_or_an + ' ' + temp.lower() + ': ')
                #appending replacement word along with original suffix (period, comma etc) and a
                #whitespace
                updated_text += replacement +suffix+ ' '
                break #exiting inner loop
        #after the loop, if the word is not keyword
        if not is_keyword:
            #simply appending the word, and a white space
            updated_text += word + ' '
    #removing trailing/leading blanks from text
    updated_text=updated_text.strip()
    #asking for output file name, opening in write mode
    output_file_name=input('Enter output file name: ')
    output_file=open(output_file_name,'w')
    #writing updated_text, saving and closing
    output_file.write(updated_text)
    output_file.close()

#output

Enter input file name: template.txt

Enter an adjective: silly

Enter a noun: chandelier

Enter a verb: screamed

Enter a noun: pickup truck

Enter output file name: output.txt

#template.txt

The ADJECTIVE panda walked to the NOUN and then VERB. A nearby NOUN was unaffected by these events.

#output.txt

The silly panda walked to the chandelier and then screamed. A nearby pickup truck was unaffected by these events.