import sys

import csv

def read$\_$sentences$($file$\_$path$)$:

$"""$

Reads sentences from a given file and returns them as a list.

$"""$

# TODO: Implement try$-$except block to handle file operations

pass

def analyze$\_$sentiment$($sentences$,$ positive$\_$keywords, negative$\_$keywords$)$:

$"""$

Analyzes the sentiment of each sentence based on given keywords.

Returns counts of sentiments$,$ detailed results, and overall sentiment$.$

$"""$

# Initialize variables to store analysis results

sentiment$\_$counts $=\{\text{'}$positive$\text{'}$: $0,$ 'negative': $0,$ 'neutral': $0\}$

detailed$\_$results $=[]$

# TODO: Implement the logic to analyze each sentence and update sentiment$\_$counts and detailed$\_$results

# TODO: Calculate the overall sentiment of the document

# Return the analysis results

return sentiment$\_$counts, detailed$\_$results, overall$\_$sentiment

def write$\_$to$\_$csv$($detailed$\_$results, output$\_$file$\_$name$)$:

$"""$

Writes the detailed sentiment analysis results to a CSV file.

$"""$

try:

# Explicitly open the file for writing

# TODO: Open the file for writing, you will need to use the newline$=\text{'}\text{'}$ parameter

# to open in order to prevent problems with writing the contents of CSV files.

file $=...$

writer $=$ csv$.$writer$($file$)$

# Write the header row to the CSV file

writer.writerow$([\text{'}$Sentiment$\text{'},$ 'Sentence'$])$

# Iterate over the results and write each one as a row in the CSV file

# TODO: You must do the iteration. If you have an individual result

# then the way to write that to a CSV file is with writer.writerow$($result$)$

except Exception as e:

print$($f$"$Error writing to CSV file: $\{$e$\}")$

finally:

# Ensure the file is closed properly

file.close$()$

def main$()$:

# Simulating command$-$line arguments for development in IDLE. Remove or comment out before submission.

sys$.$argv $=[\text{'}$sentiment$.$py$\text{'},$ 'input.txt$\text{'},$ 'output.csv$\text{'}]$

# TODO: Check for correct number of arguments and set file paths

# Define lists of positive and negative keywords

default$\_$positive$\_$keywords $=[\text{'}$good$\text{'},$ 'great', 'excellent', 'positive', 'fortunate', 'correct', 'superior'$]$

default$\_$negative$\_$keywords $=[\text{'}$bad$\text{'},$ 'terrible', 'poor', 'negative', 'unfortunate', 'wrong', 'inferior'$]$

# TODO: Call read$\_$sentences to read sentences from the input file

# TODO: Call analyze$\_$sentiment with the sentences and keyword lists

# TODO: Print the summary and overall sentiment to the console

# TODO: Call write$\_$to$\_$csv to write detailed results to a CSV file

print$("$Sentiment analysis complete. Detailed results written to CSV$.")$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$