How do I make the following code work properly:

import os

import csv

def file_to_dictionary(file_name):

trench_data = {} try:

with open(file_name, 'r') as file:

reader = csv.reader(file)

for row in reader:

trench_data[row[0]] = int(row[1])

return trench_data

except FileNotFoundError:

print("File not found.")

return {}

def display_by_name(trench_data):

print("Trench Depths by Name")

print("---------------------")

for trench in sorted(trench_data):

print("{}: {} meters".format(trench, trench_data[trench]))

def display_by_depth(trench_data):

print("Trench Depths by Depth")

print("----------------------")

for trench in sorted(trench_data, key=trench_data.get, reverse=True):

depth_in_feet = trench_data[trench] * 3.2808

print("{}: {} meters ({:.2f} feet)".format(trench, trench_data[trench], depth_in_feet))

def display_by_length(trench_data):

print("Trench Depths by Length of Name")

print("------------------------------")

for trench in sorted(trench_data, key=len):

print("{}: {} meters".format(trench, trench_data[trench]))

def menu():

choice = input("Enter N to display by name, D to display by depth, L to display by length of name, or Q to quit: ")

return choice.upper()

def main():

file_path = "C:\\Users\\Gryphon8tr\\Downloads\\Trench_Depths.csv"

trench_data = file_to_dictionary(file_path)

while True:

os.system('cls')

choice = menu()

if choice == 'N':

display_by_name(trench_data)

elif choice == 'D':

display_by_depth(trench_data)

elif choice == 'L':

display_by_length(trench_data)

elif choice == 'Q':

break

else:

print("Invalid input. Try again.")

input(" Press enter to continue...")

if __name__ == "__main__":

main()

For some reason, it returns the following error and I'm not sure why:

Traceback (most recent call last): File "C:\Users\Gryphon8tr\PycharmProjects\pythonProject\lastname_hw6.py", line 59, in main() File "C:\Users\Gryphon8tr\PycharmProjects\pythonProject\lastname_hw6.py", line 41, in main trench_data = file_to_dictionary(file_path) File "C:\Users\Gryphon8tr\PycharmProjects\pythonProject\lastname_hw6.py", line 10, in file_to_dictionary trench_data[row[0]] = int(row[1]) ValueError: invalid literal for int() with base 10: ' Max Depth (m)' Process finished with exit code 1