working on color

Author: sudormrfbin

clid/validators.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+"""Contains validating functions used to check whether valid values
+   are given when changing preferencs. ValidationError is raised
+   if value to be tested doesn't pass the test.
+"""
+
+import os
+
+class ValidationError(Exception):
+    """Raised when validation fails"""
+    pass
+
+def music_dir(test):
+    """Checks whether `test` exists and is a directory.
+
+       Args:
+            test(str): path to be tested.
+
+       Raises:
+            ValidationError: if `test` doesn't exist or is not directory
+    """
+    if not os.path.isdir(test):
+        raise ValidationError('"' + test + '"' + ' is not a directory')
+    if not os.path.exists(test):
+        raise ValidationError('"' + test + '"' + ' doesn\'t exist')
+
+
+VALIDATORS = {
+    'music_dir': music_dir
+}