TagMergeMode
- class TagMergeMode
The different tag merging modes are basically replace, overwrite and append,
but they can be seen from two directions. Given two taglists: (A) the tags
already in the element and (B) the ones that are supplied to the element (
e.g. via merge_tags() / add_tags() or a
TAG), how are these tags merged?
In the table below this is shown for the cases that a tag exists in the list
(A) or does not exists (!A) and combinations thereof.
merge mode |
A + B |
A + !B |
!A + B |
!A + !B |
REPLACE_ALL |
B |
ø |
B |
ø |
REPLACE |
B |
A |
B |
ø |
APPEND |
A, B |
A |
B |
ø |
PREPEND |
B, A |
A |
B |
ø |
KEEP |
A |
A |
B |
ø |
KEEP_ALL |
A |
A |
ø |
ø |