MobileRead Forums - View Single Post - db.find_identical_books() and large numbers of authors

JimmXinu · 07-12-2012, 06:42 PM

In my FFDL plugin I've been successfully using LibraryDatabase2.find_identical_books(mi) to find existing, matching books for some time, like so:

Code:

            mi = MetaInformation(story.getMetadata("title"),
                                 story.getList("author"))
            identicalbooks = db.find_identical_books(mi)

This works until somewhere between 50 and 120 authors. 50 works, but when there's 120 authors the find fails due to recursion depth exceeded:

Spoiler:

Is there a better way to find matching books?

I hesitate to call it a bug because 120 authors is kind of crazy. But calibre is okay with having books with that many authors, it's just the find_identical_books call that fails.

07-12-2012, 06:42 PM	#1
JimmXinu Plugin Developer Posts: 6,320 Karma: 3966249 Join Date: Dec 2011 Location: Midwest USA Device: Kindle Paperwhite(10th)	db.find_identical_books() and large numbers of authors In my FFDL plugin I've been successfully using LibraryDatabase2.find_identical_books(mi) to find existing, matching books for some time, like so: Code: mi = MetaInformation(story.getMetadata("title"), story.getList("author")) identicalbooks = db.find_identical_books(mi) This works until somewhere between 50 and 120 authors. 50 works, but when there's 120 authors the find fails due to recursion depth exceeded: Spoiler: Traceback (most recent call last): File "site-packages\calibre\library\database2.py", line 1096, in find_identical_books File "site-packages\calibre\utils\search_query_parser.py", line 207, in parse File "site-packages\calibre\utils\search_query_parser.py", line 215, in _parse File "site-packages\calibre\utils\pyparsing.py", line 1021, in parseString File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2623, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2478, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2623, in parseImpl ... File "site-packages\calibre\utils\pyparsing.py", line 2478, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2623, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2351, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2819, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2478, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 894, in _parseNoCache File "site-packages\calibre\utils\pyparsing.py", line 2351, in parseImpl File "site-packages\calibre\utils\pyparsing.py", line 898, in _parseNoCache RuntimeError: maximum recursion depth exceeded Is there a better way to find matching books? I hesitate to call it a bug because 120 authors is kind of crazy. But calibre is okay with having books with that many authors, it's just the find_identical_books call that fails.