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authorvitalyisaev <vitalyisaev@ydb.tech>2023-11-30 13:26:22 +0300
committervitalyisaev <vitalyisaev@ydb.tech>2023-11-30 15:44:45 +0300
commit0a98fece5a9b54f16afeb3a94b3eb3105e9c3962 (patch)
tree291d72dbd7e9865399f668c84d11ed86fb190bbf /contrib/python/pyre2/py3/tests/test_emptygroups.txt
parentcb2c8d75065e5b3c47094067cb4aa407d4813298 (diff)
downloadydb-0a98fece5a9b54f16afeb3a94b3eb3105e9c3962.tar.gz
YQ Connector:Use docker-compose in integrational tests
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+Empty/unused groups
+===================
+
+ >>> import re
+ >>> import re2
+ >>> re2.set_fallback_notification(re2.FALLBACK_EXCEPTION)
+
+Unused vs. empty group:
+
+ >>> re.search( '(foo)?((.*).)(bar)?', 'a').groups()
+ (None, 'a', '', None)
+ >>> re2.search('(foo)?((.*).)(bar)?', 'a').groups()
+ (None, 'a', '', None)
+
+ >>> re.search(r'((.*)?.)', 'a').groups()
+ ('a', '')
+ >>> re2.search(r'((.*)?.)', 'a').groups()
+ ('a', '')
+ >>> re.search(r'((.*)+.)', 'a').groups()
+ ('a', '')
+ >>> re2.search(r'((.*)+.)', 'a').groups()
+ ('a', '')
+
+The following show different behavior for re and re2:
+
+ >>> re.search(r'((.*)*.)', 'a').groups()
+ ('a', '')
+ >>> re2.search(r'((.*)*.)', 'a').groups()
+ ('a', None)
+
+ >>> re.search(r'((.*)*.)', 'Hello').groups()
+ ('Hello', '')
+ >>> re2.search(r'((.*)*.)', 'Hello').groups()
+ ('Hello', 'Hell')
+
+ >>> re2.set_fallback_notification(re2.FALLBACK_QUIETLY)