pdfminer python 3.5

Question

我已经学习了一些教程，但我无法让这个代码块运行，我做了从 StringIO 到 BytesIO 的必要切换（我相信？）

我不确定为什么“香蕉”什么也没打印，我认为错误可能是红鲱鱼？是不是跟我学了python2.7的教程，想把它翻译成python3有关？

errors: File "/Users/foo/PycharmProjects/Try/Pdfminer.py", line 28, in <module>
    banana = convert("A1.pdf")
  File "/Users/foo/PycharmProjects/Try/Pdfminer.py", line 19, in convert
    infile = file(fname, 'rb')
NameError: name 'file' is not defined

脚本

from io import BytesIO

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

def convert(fname, pages=None):
    if not pages:
        pagenums = set()
    else:
        pagenums = set(pages)

    output = BytesIO()
    manager = PDFResourceManager()
    converter = TextConverter(manager, output, laparams=LAParams())
    interpreter = PDFPageInterpreter(manager, converter)

    infile = file(fname, 'rb')
    for page in PDFPage.get_pages(infile, pagenums):
        interpreter.process_page(page)
    infile.close()
    converter.close()
    text = output.getvalue()
    output.close
    return text

banana = convert("A1.pdf")
print(banana)

同样的事情发生在这个变体上：

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

def convert_pdf_to_txt(path):
    rsrcmgr = PDFResourceManager()
    retstr = BytesIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
    fp = file(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

Banana = convert_pdf_to_txt("A1.pdf")
print(Banana)

我尝试过搜索（大部分 pdfminer 代码来自 this 或 this）但没有运气。

感谢任何见解。

干杯

Answer 1

pdfminer 不支持 python 3.5 版。它仅适用于 Python 2.6 或更高版本。我遇到了同样的问题，尝试使用 python 2.6 版它会解决你的问题。

Answer 2

有一种适用于 Python 3.5 的解决方案：您需要 pdfminer.six。在 win10 下我可以轻松安装它

pip install pdfminer.six

您可以检查安装的版本

pdfminer.__version__

我还没有对它进行深入测试。但我可以运行以下代码进行转换 pdf→text 和 pdf→html

Answer 3

改进的解决方案（Dez 2016）

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

def convert(case,fname, pages=None):
    if not pages: pagenums = set();
    else:         pagenums = set(pages);      
    manager = PDFResourceManager() 
    codec = 'utf-8'
    caching = True

    if case == 'text' :
        output = io.StringIO()
        converter = TextConverter(manager, output, codec=codec, laparams=LAParams())     
    if case == 'HTML' :
        output = io.BytesIO()
        converter = HTMLConverter(manager, output, codec=codec, laparams=LAParams())

    interpreter = PDFPageInterpreter(manager, converter)   
    infile = open(fname, 'rb')

    for page in PDFPage.get_pages(infile, pagenums,caching=caching, check_extractable=True):
        interpreter.process_page(page)

    convertedPDF = output.getvalue()  

    infile.close(); converter.close(); output.close()
    return convertedPDF

#//////////// main ///////////////////////
filePDF  = 'myDir//myPDF.pdf'     # input
fileHTML = 'myDir//myHTML.html'   # output
fileTXT  = 'myDir//myTXT.txt'     # output

case = "HTML"

if case == 'HTML' :
    convertedPDF = convert('HTML', filePDF, pages=[0,1])
    fileConverted = open(fileHTML, "wb", encoding="utf-8")
if case == 'text' :
    convertedPDF = convert('text', filePDF, pages=[0,1])
    fileConverted = open(fileTXT, "w", encoding="utf-8")

fileConverted.write(convertedPDF)
fileConverted.close()
#print(convertedPDF) 

Answer 4

在我使用 Python 3.7 的情况下，我尝试使用它，它对我来说就像一个魅力！

这是我使用的代码：

def convert_pdf_to_txt(path_to_file):
    rsrcmgr = PDFResourceManager()
    retstr = StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
    fp = open(path_to_file, '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

Answer 5

函数 file() 在 Python 2.7 中是 built-in function。但它不再是 Python 3.5 中的 built-in function。

您应该将file() 更改为open()。