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validation: mention ISO 639-2 to give people a clue about how to find the appropriate code

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James R. Barlow
2021-06-28 15:19:59 -07:00
parent c935ba070b
commit 0b834411fe
1 changed files with 4 additions and 3 deletions
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7
src/ocrmypdf/_validation.py
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@@ -65,13 +65,14 @@ def check_options_languages(options, ocr_engine_languages):
log.debug("No language specified; assuming --language %s", DEFAULT_LANGUAGE)
if not ocr_engine_languages:
return
if not options.languages.issubset(ocr_engine_languages):
missing_languages = options.languages - ocr_engine_languages
if missing_languages:
msg = (
f"OCR engine does not have language data for the following "
"requested languages: \n"
)
for lang in options.languages - ocr_engine_languages:
msg += lang + '\n'
msg += '\n'.join(lang for lang in missing_languages)
msg += '\nNote: most languages are identified by a 3-digit ISO 639-2 Code'
raise MissingDependencyError(msg)