I need some clarity on the use of the open command

[snippsat]

With this arrangement, CreateFile doesn't have a return line and the caller then gets nothing to do its function with. I think if it returns f, the file will close as soon as the function ends so I'm not sure what the caller gets. I will set up a test for it

Yes,but the first code just open a diffent file object and return it this make no sense at all.
So i can write a more flexible apporch using a class and some gussing what this task shall do.

# court.py
import csv
import os

class Court:
    def __init__(self, filepath, filename, fullpath=''):
        self.filepath = filepath
        self.filename = filename
        self.fullpath = os.path.join(self.filepath, self.filename)

    def check_path(self):
        if not os.path.exists(self.fullpath):
            # Folder dos not exists,make it
            os.makedirs(self.filepath)
            self.fullpath = os.path.join(self.filepath, self.filename)
        else:
            # The folder/file exists
            self.fullpath 

    def create_file(self):
        header = ['Court', 'Location', 'Citation Number',
                  'Case Description', 'File Date', ]
        with open(self.fullpath, 'a', encoding='utf-8', newline='') as f:
            writer = csv.writer(f)
            writer.writerow(header)

    def add_to_csv(self, data):
        with open(self.fullpath, mode='a', newline='') as cv:
            writer = csv.writer(cv, delimiter=',', quoting=csv.QUOTE_MINIMAL)
            writer.writerow(data)

    @property
    def read_csv(self):
        with open(self.fullpath, newline='') as csv_file:
            reader = csv.reader(csv_file)
            for row in reader:
                print(', '.join(row))

Using this class,no folder of file exsist when i start this.

λ ptpython -i court.py
>>> obj = Court(r'G:\div_code\test_cs1', 'data.csv')
>>> obj.check_path()
>>> obj.create_file()

# Now can read to see what have so far
>>> obj.read_csv
Court, Location, Citation Number, Case Description, File Date

# Add data to csv
>>> cort_data = ['Kent', 'Usa', '44455', 'Theft of car dealer', '8-11-22']
>>> obj.add_to_csv(cort_data)
>>> cort_data = ['Murder', 'Norway','9999', 'Bank robber', '5-1-22']
>>> obj.add_to_csv(cort_data)

# Read again to see what have now
>>> obj.read_csv
Court, Location, Citation Number, Case Description, File Date
Kent, Usa, 44455, Theft of car dealer, 8-11-22
Murder, Norway, 9999, Bank robber, 5-1-22

If look this hope see that this is more flexible,and is now easy to change if have more Court data(can just loop over and add).