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@pubpub-zz Sure! I've edited the first comment :-) |
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There is actually another solution: Guarded imports / being really careful with the import order. But I haven't figured it out how to do it without cyclic imports. |
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## main #1303 +/- ##
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Coverage 95.02% 95.02%
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Files 30 30
Lines 4986 4986
Branches 1025 1025
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Hits 4738 4738
Misses 141 141
Partials 107 107
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Version 2.10.5, 2022-09-04 -------------------------- New Features (ENH): - Process XRefStm (#1297) - Auto-detect RTL for text extraction (#1309) Bug Fixes (BUG): - Avoid scaling cropbox twice (#1314) Robustness (ROB): - Fix offset correction in revised PDF (#1318) - Crop data of /U and /O in encryption dictionary to 48 bytes (#1317) - MultiLine bfrange in cmap (#1299) - Cope with 2 digit codes in bfchar (#1310) - Accept '/annn' charset as ASCII code (#1316) - Log errors during Float / NumberObject initialization (#1315) - Cope with corrupted entries in xref table (#1300) Documentation (DOC): - Migration guide (PyPDF2 1.x \xe2\x9e\x94 2.x) (#1324) - Creating a coverage report (#1319) - Fix AnnotationBuilder.free_text example (#1311) - Fix usage of page.scale by replacing it with page.scale_by (#1313) Developer Experience (DEV): - Only run coverage for PyPDF2 Maintenance (MAINT): - PdfReaderProtocol (#1303) - Throw PdfReadError if Trailer can't be read (#1298) - Remove catching OverflowException (#1302) Full Changelog: 2.10.4...2.10.5
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includes also reintroduction of py-pdf#1303 wrongly cancelled in py-pdf#1309
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PyPDF2 has some dependencies that make proper typing hard:
The simplest solution would be to put both classes in the same file, but that makes PRs hard to read. Additionally, bigger files mean merge conflicts happen more often.
Another solution is to just not use type annotations for one of the objects (or use
Anyas the type)The solution implemented in this PR is to define a
Protocol(PEP 544): A protocol just states which methods a class is expected to have (with their function signature). It's duck typing: If it walks like a duck and it quacks like a duck, then it must be a duck.So we define the expected behavior instead of referencing to the specific class.
typing.Iterable is an example for a Protocol. In the Java world, one would call this an interface.