Question

In this exercise, you will build a basic spell checker.

Write a module called spell_checker.py. Your module should contain the following functions:

1. word_correct(string) -> string
   word_correct() takes in a string consisting of one word. It searches for the line in aspell.txt containing that word and replaces it with
   the first word present in the file. If the word is not in the file, it returns the same word back.
   
   For example,
   word_correct("cookie") = "cookie"
   word_correct("acommadate") = "accommodate"
   word_correct("basically") = "basically"
   
   Note that if the correction does not exist in aspell.txt, you will still have an incorrect word.
   
2. line_correct( string) -> string
   line_correct() takes in a string consisting of a line of words. It goes through each word in the line and corrects it using word_correct().
   
   For example,
   line_correct("can you acommadate") = "can you accommodate"
   
   
3. file_correct ( string) -> nothing
   line_correct() takes in a string that is the name of a file. It goes through each line in the file and corrects any spelling errors. It prints the results to a "corrected" txt file. For example, if the file's name is "file.txt", the corrected file should be called "file_corrected.txt"

You may use "blurb.txt" to test out your module.

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. If not, PLEASE let me know before you rate, I’ll help you fix whatever issues. Thanks

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

#important notes

for the below code to work properly, you must ensure following things:

1) aspell.txt file must be present on the same directory
2) aspell.txt file must be valid (exactly in the format specified)
3) blurb.txt file must be present on the same directory
4) there should not be any punctuations in blurb.txt

failure to add aspell.txt and blurb.txt files will result in FileNotFoundException and that is not a mistake from my side..

#code

#spell_checker.py

def word_correct(word):
    # opening aspell.txt file, make sure file exist on the same directory
    file = open('aspell.txt', 'r')
    # looping through each line in file
    for line in file:
        # removing trailing newline and splitting line into words (by white space)
        words = line.strip().split(" ")
        # if word is in resultant list, closing file, returning first word on the list
        if word in words:
            file.close()
            return words[0]
    # if not found, closing file and returning word unchanged
    file.close()
    return word


def line_correct(line):
    corrected = ''
    # looping through each word in line
    for word in line.split():
        # appending corrected word to corrected string followed byt a space
        corrected += word_correct(word) + " "
    # returning corrected after removing stray " " at the end
    return corrected.rstrip(' ')


def file_correct(filename):
    # creating output file name. for example, if input file name is "data.txt", output file name
    # will be "data_corrected.txt"
    outputfilename = filename[0:filename.rfind('.')] + "_corrected" + filename[filename.rfind('.'):]
    # opening input file and output file
    inf = open(filename, 'r')
    outf = open(outputfilename, 'w')
    # looping through each line
    for line in inf:
        # correcting current line, writing to outf
        outf.write(line_correct(line.strip()) + "\n")
    # closing both file, saving changes
    inf.close()
    outf.close()


# code for testing with "blurb.txt" file
# if everything works correctly, "blurb_corrected.txt" file will be generated.
if __name__ == '__main__':
    file = 'blurb.txt'
    file_correct(file)