diff options
Diffstat (limited to 'src/zope/interface/adapter.py')
| -rw-r--r-- | src/zope/interface/adapter.py | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/zope/interface/adapter.py b/src/zope/interface/adapter.py index 8242b6b..b9836d9 100644 --- a/src/zope/interface/adapter.py +++ b/src/zope/interface/adapter.py @@ -234,12 +234,15 @@ class BaseAdapterRegistry(object): Remove the item *to_remove* from the (non-``None``, non-empty) *existing_leaf_sequence* and return the mutated sequence. - Subclasses that redefine `_leafSequenceType` should override - this method. - If there is more than one item that is equal to *to_remove* they must all be removed. + Subclasses that redefine `_leafSequenceType` should override + this method. Note that they can call this method to help + in their implementation; this implementation will always + return a new tuple constructed by iterating across + the *existing_leaf_sequence* and omitting items equal to *to_remove*. + :param existing_leaf_sequence: As for `_addValueToLeaf`, probably an instance of `_leafSequenceType` but possibly an older type; never `None`. |