Updated readme to reflect auto extension in filenames

README.md

@@ -19,8 +19,5 @@ Where "file_format" could be:
 
 Where "input_csv" would be your input csv as in swatchos.csv
 
-Where "output_file" could be:
-- swatchos.gpl
-- swatchos.xml
-- swatchos.kpl
-Replacing swatchos with your colour palette name
+Where "output_file" is the name of your palette, the required extension is added automatically
+

main.py

@@ -3,7 +3,17 @@ import csv
 
 def main(file_format, input, output):
 
-    with open(input, newline='') as csvfile, open(output, "w") as out:
+    output_file_format = ""
+    
+    match file_format:
+        case "gpl":
+            output_file_format = f"{output}.gpl"
+        case "scribus":
+            output_file_format = f"{output}.xml"
+        case: "krita":
+            output_file_format = f"{output}.kpl"
+    
+    with open(input, newline='') as csvfile, open(output_file_format, "w") as out:
        code_reader = csv.reader(csvfile, delimiter=',')
        next(code_reader)