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fb2a1d42ce
### Summary Closes #1798 Fixes language detection of elements with empty strings: This resolves a warning message that was raised by `langdetect` if the language was attempted to be detected on an empty string. Language detection is now skipped for empty strings. ### Testing on the main branch this will log the warning "No features in text", but it will not log anything on this branch. ``` from unstructured.documents.elements import NarrativeText, PageBreak from unstructured.partition.lang import apply_lang_metadata elements = [NarrativeText("Sample text."), PageBreak("")] elements = list( apply_lang_metadata( elements=elements, languages=["auto"], detect_language_per_element=True, ), ) ``` ### Other Also changes imports in test_lang.py so imports are explicit --------- Co-authored-by: cragwolfe <crag@unstructured.io>
98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
import pytest
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from unstructured.documents.elements import (
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NarrativeText,
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PageBreak,
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)
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from unstructured.partition.lang import (
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apply_lang_metadata,
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detect_languages,
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prepare_languages_for_tesseract,
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)
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def test_prepare_languages_for_tesseract_with_one_language():
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languages = ["en"]
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assert prepare_languages_for_tesseract(languages) == "eng"
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def test_prepare_languages_for_tesseract_special_case():
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languages = ["osd"]
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assert prepare_languages_for_tesseract(languages) == "osd"
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languages = ["equ"]
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assert prepare_languages_for_tesseract(languages) == "equ"
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def test_prepare_languages_for_tesseract_removes_empty_inputs():
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languages = ["kbd", "es"]
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assert prepare_languages_for_tesseract(languages) == "spa+spa_old"
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def test_prepare_languages_for_tesseract_includes_variants():
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languages = ["chi"]
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assert prepare_languages_for_tesseract(languages) == "chi_sim+chi_sim_vert+chi_tra+chi_tra_vert"
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def test_prepare_languages_for_tesseract_with_multiple_languages():
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languages = ["ja", "afr", "en", "equ"]
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assert prepare_languages_for_tesseract(languages) == "jpn+jpn_vert+afr+eng+equ"
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def test_prepare_languages_for_tesseract_warns_nonstandard_language(caplog):
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languages = ["zzz", "chi"]
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assert prepare_languages_for_tesseract(languages) == "chi_sim+chi_sim_vert+chi_tra+chi_tra_vert"
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assert "not a valid standard language code" in caplog.text
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def test_prepare_languages_for_tesseract_warns_non_tesseract_language(caplog):
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languages = ["kbd", "eng"]
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assert prepare_languages_for_tesseract(languages) == "eng"
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assert "not a language supported by Tesseract" in caplog.text
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def test_detect_languages_english_auto():
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text = "This is a short sentence."
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assert detect_languages(text) == ["eng"]
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def test_detect_languages_english_provided():
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text = "This is another short sentence."
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languages = ["en"]
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assert detect_languages(text, languages) == ["eng"]
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def test_detect_languages_korean_auto():
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text = "안녕하세요"
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assert detect_languages(text) == ["kor"]
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def test_detect_languages_gets_multiple_languages():
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text = "My lubimy mleko i chleb."
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assert detect_languages(text) == ["ces", "pol", "slk"]
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def test_detect_languages_warns_for_auto_and_other_input(caplog):
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text = "This is another short sentence."
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languages = ["en", "auto", "rus"]
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assert detect_languages(text, languages) == ["eng"]
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assert "rest of the inputted languages will be ignored" in caplog.text
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def test_detect_languages_raises_TypeError_for_invalid_languages():
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with pytest.raises(TypeError):
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text = "This is a short sentence."
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detect_languages(text, languages="eng") == ["eng"]
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def test_apply_lang_metadata_has_no_warning_for_PageBreak(caplog):
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elements = [NarrativeText("Sample text."), PageBreak("")]
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elements = list(
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apply_lang_metadata(
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elements=elements,
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languages=["auto"],
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detect_language_per_element=True,
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),
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)
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assert "No features in text." not in [rec.message for rec in caplog.records]
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