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Implement Claim.__eq__

Claims are same when they are derived from the same
property, have the same target and qualifiers
(which are also claims, so this comparison happens
recursively).

Bug: T76615
Change-Id: Ib082ebf8c5a11f1e79e3d863d4f8d4b1fe2ef8da
---
M pywikibot/page.py
1 file changed, 16 insertions(+), 0 deletions(-)

diff --git a/pywikibot/page.py b/pywikibot/page.py
index 1fbd1c2..c89d5e4 100644
--- a/pywikibot/page.py
+++ b/pywikibot/page.py
@@ -26,6 +26,7 @@
 import unicodedata
 
 from collections import Counter, defaultdict, namedtuple, OrderedDict
+from itertools import chain
 from warnings import warn
 
 import pywikibot
@@ -4871,6 +4872,21 @@
         return '{cls_name}.fromJSON({0}, {1})'.format(
             repr(self.repo), self.toJSON(), cls_name=type(self).__name__)
 
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            return False
+
+        for attr in ('id', 'snaktype', 'target'):
+            if getattr(self, attr) != getattr(other, attr):
+                return False
+
+        my_qualifiers = set(chain.from_iterable(self.qualifiers.values()))
+        other_qualifiers = set(chain.from_iterable(other.qualifiers.values()))
+        return my_qualifiers == other_qualifiers
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
     @classmethod
     def fromJSON(cls, site, data):
         """

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