Write csv of lat/lon from directory of images

ee.py

#!/usr/bin/env python3

import csv
import os
import exifread

# Prompt for directory to read from.
dir_name = input("Enter the directory to search [./]: ")
csv_file = input("Enter name for output file [output.csv]: ")
if dir_name == '':
    dir_name = './'

if csv_file == '':
    csv_file = 'output.csv'


def _convert_to_degress(value):
    """
    Helper function to convert the GPS coordinates stored in the EXIF to degress in float format
    :param value:
    :type value: exifread.utils.Ratio
    :rtype: float
    """
    d = float(value.values[0].num) / float(value.values[0].den)
    m = float(value.values[1].num) / float(value.values[1].den)
    s = float(value.values[2].num) / float(value.values[2].den)

    return d + (m / 60.0) + (s / 3600.0)


directory = os.listdir(dir_name)

with open(csv_file, 'w', newline='') as csv_file:
    csvwriter = csv.writer(csv_file)

    for files in directory:
        if files.endswith (('jpg','JPG','png','PNG','tiff','TIFF')):
            file_name = os.path.join(dir_name, files)
            with open(file_name, 'rb') as file:

                tags = exifread.process_file(file)
                latitude = tags.get('GPS GPSLatitude')
                latitude_ref = tags.get('GPS GPSLatitudeRef')
                longitude = tags.get('GPS GPSLongitude')
                longitude_ref = tags.get('GPS GPSLongitudeRef')

                print(f'{file_name}, {_convert_to_degress(latitude)}, {_convert_to_degress(longitude)}')
                csvwriter.writerow([file_name, _convert_to_degress(latitude), _convert_to_degress(longitude)])