如何在 Python 中使用 PDFMiner 從 PDF 中提取文字？

Extracting Text from PDFs with PDFMiner in Python

Question:

How can I extract text from a PDF file using PDFMiner in Python?

Answer:

Due to recent updates in PDFMiner's API, some existing documentation may contain outdated code. To extract text from a PDF file using the latest version of PDFMiner, follow these steps:

from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from io import StringIO

def extract_pdf_text(path):
    rsrcmgr = PDFResourceManager()
    retstr = StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
    fp = open(path, 'rb')
    interpreter = PDFPageInterpreter(rsrcmgr, device)
    password = ""
    maxpages = 0
    caching = True
    pagenos = set()

    for page in PDFPage.get_pages(fp, pagenos, maxpages=maxpages, password=password, caching=caching, check_extractable=True):
        interpreter.process_page(page)

    text = retstr.getvalue()

    fp.close()
    device.close()
    retstr.close()
    return text

This updated code addresses the changes in PDFMiner's syntax. It successfully extracts text from PDF files, as verified with Python 3.x, 3.7, and October 3, 2019 Python 3.7 using pdfminer.six, released in November 2018.

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