useList.py

# This program exercises lists.

# The following files must be in the same folder:

# abstractcollection.py

# abstractlist.py

# arraylist.py

# arrays.py

# linkedlist.py

# node.py

# input.txt - the input text file.

# Input: input.txt

# This file must be in the same folder.

# To keep things simple:

# This file contains no punctuation.

# This file contains only lowercase characters.

# Output: output.txt

# This file will be created in the same folder.

# All articles are removed.

# Certain prepositions are removed.

# Duplicate consecutive words are reduced to a single occurrence.

# Note: The words "first" and "last" are not reduced.

# Certain misspelled words are flagged.

# Occurrences of "first" are moved to the front of a line.

# Occurrences of "last" are moved to the end of a line.

from arraylist import ArrayList

from linkedlist import LinkedList

# Data:

articles = ArrayList(["a", "the"])

prepositions = LinkedList(["after", "before", "from", "in", "off", "on", "under", "out", "over", "to"])

misspellings = ["foriegn", "excede", "judgement", "occurrance", "preceed", "rythm", "thier", ]

inputFile = open("input.txt", "r")

outputFile = open("output.txt", "w")

FIRST = "first"

FLAG = "FLAG:"

LAST = "last"

# Processing:

# Part 1:

# Removes all items from the words list that are found in the removals list.

# Input:

# words - an ArrayList of words, no uppercase, no punctuation

# wordsIter - a list iterator for the words list

# removals - the list of words to remove

def removeItems(words, wordsIter, removals):

#yourcode

# Part 2:

# Removes extra occurrances of consecutive duplicate words from the words list.

# Note: It does not reduce the words "first" and "last".

# Input:

# words - an ArrayList of words, no uppercase, no punctuation

# wordsIter - a list iterator for the words list

def reduceDuplicates(words, wordsIter):

#yourcode

# Part 3:

# Flags certain misspelled words in the words list by inserting "FLAG:" before them.

# Input:

# words - an ArrayList of words, no uppercase, no punctuation

# wordsIter - a list iterator for the words list

# misspellings - the list of misspelled words to flag

def flagMisspelled(words, wordsIter, misspellings):

#?yourcode

# Part 4:

# Move all occurrences of "first" to the front of the words list.

# Input:

# words - an ArrayList of words, no uppercase, no punctuation

# wordsIter - a list iterator for the words list

def moveFirstLit(words, wordsIter):

#yourcode

# Part 5:

# Move all occurrences of "last" to the end of the words list.

# Input:

# words - an ArrayList of words, no uppercase, no punctuation

# wordsIter - a list iterator for the words list

def moveLastLit(words, wordsIter):

#?yourcode

def writeOutputLine(words):

outputLine = " ".join(words)

outputLine = outputLine + " "

print(outputLine, end="")

outputFile.write(outputLine)

# Main processing loop:

for line in inputFile:

words = ArrayList(line.split())

wordsIter = words.listIterator()

# Make no changes to blank lines:

if (len(words) == 0):

writeOutputLine(words)

continue

# Make no changes to comment lines:

if (words[0] == "#"):

writeOutputLine(words)

continue

# Remove articles:

removeItems(words, wordsIter, articles)

# Remove prepositions:

removeItems(words, wordsIter, prepositions)

# Reduce duplicate consecutive words to a single occurrence:

reduceDuplicates(words, wordsIter)

# Insert "FLAG:" before certain misspelled words:

flagMisspelled(words, wordsIter, misspellings)

# Move all occurrences of "first" to the front of the line:

moveFirstLit(words, wordsIter)

# Move all occurrences of "last" to the end of the line:

moveLastLit(words, wordsIter)

# Write output line:

writeOutputLine(words)

# Wrap-up

inputFile.close()

outputFile.close()

**Output**

# Articles: first this is test case this is second test case first this is neither nor second test case abc this is articles test case last # Certain prepositions: first dog ran deer but second dog i will walk here there it is warm here and cold there rug is table and table is rug this is prepositions test case last # Duplicate consecutive words (except "first" and "last"): boat had blue hull boat had blue very blue hull first boat had blue blue hull it is best way go that thats all folks rolling river first first words and are intentionally not reduced last last my # Certain misspelled words: FLAG: foriegn concept that preceeds FLAG: thier duplicated FLAG: occurrance will FLAG: excede maximum allowed value FLAG: judgement of FLAG: thier souls music had moving FLAG: rythm # Occurrences of "first" and "last": first shall be last first shall be last first first multiple place and place winners and losers last last first first first last last

**I need help on parts 2 and 5 please. I need the codes for all parts and not the explanation. Thanks! I will rate you!**