86 lines
2.4 KiB
Python
Executable File
86 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# Exercise pdfminer, looking deeply into a PDF document,
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# print some stats to stdout
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# Usage: pdfstats.py <PDF-filename>
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import sys
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import os
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import collections
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from typing import Any, Counter, Iterator, List
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from pdfminer.pdfparser import PDFParser
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from pdfminer.pdfdocument import PDFDocument, PDFTextExtractionNotAllowed
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from pdfminer.pdfpage import PDFPage
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from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
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from pdfminer.converter import PDFPageAggregator
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from pdfminer.layout import LAParams, LTContainer
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_, SCRIPT = os.path.split(__file__)
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def msg(*args: object, **kwargs: Any) -> None:
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print(' '.join(map(str, args)), **kwargs) # noqa E999
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def flat_iter(obj: object) -> Iterator[object]:
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yield obj
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if isinstance(obj, LTContainer):
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for ob in obj:
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yield from flat_iter(ob)
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def main(args: List[str]) -> int:
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msg(SCRIPT, args)
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if len(args) != 1:
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msg('Parse a PDF file and print some pdfminer-specific stats')
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msg('Usage:', SCRIPT, '<PDF-filename>')
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return 1
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infilename, = args
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lt_types: Counter[str] = collections.Counter()
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with open(infilename, 'rb') as pdf_file:
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# Create a PDF parser object associated with the file object.
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parser = PDFParser(pdf_file)
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# Create a PDF document object that stores the document structure.
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# Supply the password for initialization.
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password = ''
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document = PDFDocument(parser, password)
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# Check if the document allows text extraction.
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if not document.is_extractable:
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raise PDFTextExtractionNotAllowed(infilename)
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# Make a page iterator
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pages = PDFPage.create_pages(document)
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rsrcmgr = PDFResourceManager()
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laparams = LAParams(
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detect_vertical=True,
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all_texts=True,
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)
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device = PDFPageAggregator(rsrcmgr, laparams=laparams)
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interpreter = PDFPageInterpreter(rsrcmgr, device)
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# Look at all (nested) objects on each page
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for page_count, page in enumerate(pages, 1):
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# oh so stateful
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interpreter.process_page(page)
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layout = device.get_result()
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lt_types.update(type(item).__name__ for item in flat_iter(layout))
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msg('page_count', page_count)
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msg('lt_types:', ' '.join('{}:{}'.format(*tc) for tc in lt_types.items()))
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return 0
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if __name__ == '__main__':
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sys.exit(main(sys.argv[1:]))
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