function get_field_key_by_label added

xsa/datatypereader.py

@@ -129,6 +129,20 @@ def get_field_label_by_key(root_type, field_key):
     return field_key
 
 
+def get_field_key_by_label(root_type, label):
+    """Returns the key of the given field-label.
+
+    **Parameters**
+        :root_type: str, Root-Type of label
+        :label: str, field-label, for which the key will be returned
+    """
+    fields = get_fields(root_type)
+    for f in fields:
+        if f['label'] == label:
+            return f["key"]
+    return label
+
+
 def get_field_label_by_field(root_type, field):
     """
     Returns the label of the given field.