Complete Guide to Building a Polling Challenge in Python: Assignment Solution

Instructions

Objective

Write a program to create a polling challenge in python language.

Requirements and Specifications

Assignment

Download the PyPoll_Challenge_starter_code.py file and rename it PyPoll_Challenge.py.

Use the step-by-step instructions below to add code where indicated by the numbered comments in the starter code file.

Deliverable 1:

Step 1:

• Initialize a county list, like the candidate_options list, that will hold the names of the counties.
• Initialize a dictionary, like the candidate_votes dictionary, that will hold the county as the key and the votes cast for each county as the values.

Step 2:

• Initialize an empty string, like winning_candidate, that will hold the county name for the county with the largest turnout.
• Initialize a variable, like the winning_count variable, that will hold the number of votes of the county that had the largest turnout.

Step 3:

• While reading the election results from each row inside the for loop, write a script that gets the county name from each row.

Step 4a:

• Write a decision statement with a logical operator to check if the county name acquired in Step 3 is in the county list you created in Step 1.

Step 4b:

• If the county is not in the list created in Step 1, add it to the list of county names like you did when adding a candidate to the candidate_options list.

Step 4c:

• Write a script that initializes the county vote to zero, like you did when you began to track the vote counts for the candidates.

Step 5:

• Write a script that adds a vote to the county’s vote count as you are looping through all the rows, like you did for the candidate’s vote count.

Step 6a:

• Write a repetition statement to get the county from the county dictionary that was created in Step 1.

Step 6b:

• Initialize a variable to hold the county’s votes as they are retrieved from the county votes dictionary.

Step 6c:

• Write a script that calculates the county’s votes as a percentage of the total votes.

Step 6d:

• Write a print statement that prints the current county, its percentage of the total votes, and its total votes to the command line.

Step 6e:

• This step will be completed in Deliverable 2.

Step 6f:

• Write a decision statement that determines the county with the largest vote count and then adds that county and its vote count to the variables created in Step 2.

Step 7:

• Write a print statement that prints out the county with the largest turnout.

DELIVERABLE 2:

Step 6e:

• Write a script that saves each county, the county’s total votes, and the county’s percentage of total votes to the election_results.txt file.

Step 8:

• Write a script that saves the county with the largest turnout to the election_results.txt file.
• After you complete your python assignment run your solution to Deliverable 2, confirm that your election_results.txt file matches the following image:

Source Code

# The data we need to retrieve # 1. The total number of votes cast # 2. A complete list of candidates who recieved votes # 3. Percentage of votes each candidate won # 4. Total number of votes each candidate won # 5. The winner of the election based on popular vote # Add our dependencies. import csv import os # Assign a variable to load a file from a path. file_to_load = os.path.join("Resources", "election_results.csv") # Assign a variable to save the file to a path. file_to_save = os.path.join("analysis", "election_analysis.txt") # Initialize a total vote counter. total_votes = 0 # Candidate options and candidate votes. candidate_options = [] candidate_votes = {} # Track the winning candidate, vote count, and percentage. winning_candidate = "" winning_count = 0 winning_percentage = 0 # Open the election results and read the file. with open(file_to_load) as election_data: file_reader = csv.reader(election_data) # Read the header row. headers = next(file_reader) # Print each row in the CSV file. for row in file_reader: # Add to the total vote count. total_votes += 1 # Get the candidate name from each row. candidate_name = row[2] # If the candidate does not match any existing candidate, add the # the candidate list. if candidate_name not in candidate_options: # Add the candidate name to the candidate list. candidate_options.append(candidate_name) # And begin tracking that candidate's voter count. candidate_votes[candidate_name] = 0 # Add a vote to that candidate's count. candidate_votes[candidate_name] += 1 # Save the results to our text file. with open(file_to_save, "w") as txt_file: # After opening the file print the final vote count to the terminal. election_results = ( f"\nElection Results\n" f"-------------------------\n" f"Total Votes: {total_votes:,}\n" f"-------------------------\n") print(election_results, end="") # After printing the final vote count to the terminal save the final vote count to the text file. txt_file.write(election_results) for candidate_name in candidate_votes: # Retrieve vote count and percentage. votes = candidate_votes[candidate_name] vote_percentage = float(votes) / float(total_votes) * 100 candidate_results = ( f"{candidate_name}: {vote_percentage:.1f}% ({votes:,})\n") # Print each candidate's voter count and percentage to the terminal. print(candidate_results) # Save the candidate results to our text file. txt_file.write(candidate_results) # Determine winning vote count, winning percentage, and winning candidate. if (votes > winning_count) and (vote_percentage > winning_percentage): winning_count = votes winning_candidate = candidate_name winning_percentage = vote_percentage # Print the winning candidate's results to the terminal. winning_candidate_summary = ( f"-------------------------\n" f"Winner: {winning_candidate}\n" f"Winning Vote Count: {winning_count:,}\n" f"Winning Percentage: {winning_percentage:.1f}%\n" f"-------------------------\n") print(winning_candidate_summary) # Save the winning candidate's results to the text file. txt_file.write(winning_candidate_summary)