FileNotFoundError: [Errno 2] No such file or directory: 'movies.csv'

[RedSkeleton007]

I tried to run my movie list program:

#!/usr/bin/env python3
#MovieListCSV.py
#This program does pretty much the same thing as MovieList2D.py. The only
#difference about this program is that it calls the writeMovies function
#whenever the user updates the list, so that the data is still saved if this
#program crashes.
import csv

FILENAME = "movies.csv"

def writeMovies(movies):
    with open(FILENAME, "w", newline="") as file:
        writer = csv.writer(file)
        writer.writerows(movies)

def readMovies():
    movies = []
    with open(FILENAME, "r", newline="") as file:
        reader = csv.reader(file)
        for row in reader:
            movies.append(row)
        return movies

def listMovies(movies):
    for i in range(len(movies)):
        movie = movies[i]
        print(str(i+1) + ". " + movie[0] + " (" + movie[1] + ")")
    print()

def addMovie(movies):
    name = input("Name: ")
    year = input("Year: ")
    movie = []
    movie.append(name)
    movie.append(year)
    movies.append(movie)
    writeMovies(movies)
    print(name + " was added.\n")

def deleteMovie(movies):
    index = int(input("Movie Number: "))
    movie = movies.pop(index - 1)
    writeMovies(movies)
    print(movie[0] + " was deleted.\n")

def displayMenu():
    print("COMMAND MENU")
    print("list - List all movies")
    print("add  - Add a movie")
    print("del  - Delete a movie")
    print("exit - Exit the program")
    print()

def main():
    displayMenu()
    movies = readMovies()
    while True:
        command = input("Enter Command: ")
        if command.lower() == "list":
            listMovies(movies)
        elif command.lower() == "add":
            addMovie(movies)
        elif command.lower() == "del":
            deleteMovie(movies)
        elif command.lower() == "exit":
            break
        else:
            print("Invalid command. Please try again.")
    print("Bye!")

if __name__ == "__main__":
    main()

But apparently, storing the movies.csv file into the FILENAME global constant didn't work:

Error:
>>> ================================ RESTART ================================
>>> 
COMMAND MENU
list - List all movies
add  - Add a movie
del  - Delete a movie
exit - Exit the program

Traceback (most recent call last):
  File "F:\Python\Python36-32\SamsPrograms\MovieListCSV.py", line 72, in <module>
    main()
  File "F:\Python\Python36-32\SamsPrograms\MovieListCSV.py", line 56, in main
    movies = readMovies()
  File "F:\Python\Python36-32\SamsPrograms\MovieListCSV.py", line 18, in readMovies
    with open(FILENAME, "r", newline="") as file:
FileNotFoundError: [Errno 2] No such file or directory: 'movies.csv'
>>>

What's wrong? Why isn't movies.csv being created?

[buran]

What's wrong? Why isn't movies.csv being created?

in readMovies() function (bad names for functions, by the way, not PEP8 compliant) you open the file in 'r' mode. in read mode if the file does not exists, it is not created.

[RedSkeleton007]

in readMovies() function, you open the file in 'r' mode. in read mode if the file does not exists, it is not created.

If this line:

FILENAME = "movies.csv"

Does not create the file ahead of time for the readMovies function, what else do I need to do to make sure the movies.csv file gets created?

[buran]

you don't want empty file. in normal business case if the file does not exists, you would inform user the file does not exists, then advise user to add some movies first before being able to read from the fileFILENAME = "movies.csv"

and no, this

FILENAME = "movies.csv"

just craete a variable FILENAME, that points to str object 'movies.csv', or in simple terms variable FILENAME has value 'movies.csv' which is string. No I/O operations whatsoever.
I'm afraid that you show some lack of basic knowledge - you should revisit this topic

[buran]

also possible - if file does not exists reading option should not be present at all for the user to choose it

[snippsat]

The logic is a little off as mention bye @buran.
This is a quick and dirty fix,also your del is function not working for me.

if __name__ == "__main__":
    open(FILENAME, 'a').close()
    main()

Output:
C:\code
λ python movie.py
COMMAND MENU
list - List all movies
add  - Add a movie
del  - Delete a movie
exit - Exit the program

Enter Command: add
Name: Seven
Year: 1995
Seven was added.

Enter Command: list
1. Seven (1995)

Enter Command: exit
Bye!

C:\code
λ python movie.py
COMMAND MENU
list - List all movies
add  - Add a movie
del  - Delete a movie
exit - Exit the program

Enter Command: list
1. Seven (1995)

Enter Command: add
Name: Foo
Year: 2000
Foo was added.

Enter Command: list
1. Seven (1995)
2. Foo (2000)

Enter Command: Exit
Bye!