使用pdfminer水平读取pdf文件

Question

我想用pdfminer（版本20140328）提取pdf。

这是提取pdf的代码：

import sys
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.pdfpage import PDFPage
from pdfminer.converter import XMLConverter, HTMLConverter, TextConverter
from pdfminer.layout import LAParams
from cStringIO import StringIO
import urllib2

def pdf_to_string(data):
    fp = StringIO(data)
    rsrcmgr = PDFResourceManager()
    retstr = StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
    # Create a PDF interpreter object.
    interpreter = PDFPageInterpreter(rsrcmgr, device)

    # Process each page contained in the document.
    for page in PDFPage.get_pages(fp):
        interpreter.process_page(page)
        data =  retstr.getvalue()

    return data

pdf_url="http://www.consilium.europa.eu/uedocs/cms_data/docs/pressdata/en/ecofin/140836.pdf"
file_object = urllib2.urlopen(urllib2.Request(pdf_url)).read()
string=pdf_to_string(file_object)

这是pdf的截图：

问题是pdfminer没有水平读取（人然后位置）但是在列中（所有人都是他们各自的位置）：

Belgium: 
Mr Koen GEENS 

Bulgaria: 
Mr Petar CHOBANOV 

Czech Republic: 
Mr Radek URBAN 


Minister for Finance, with responsibility for the Civil 
Service 

Minister for Finance 

Deputy Minister for Finance 

如何让pdfminer水平阅读文字？

Answer 1

我找到了一个使用 pdftotext 的工作解决方案：

import tempfile, subprocess

def pdf_to_string(file_object):
    pdfData = file_object.read()
    tf = tempfile.NamedTemporaryFile()
    tf.write(pdfData)
    tf.seek(0)
    outputTf = tempfile.NamedTemporaryFile()

    if (len(pdfData) > 0) :
        out, err = subprocess.Popen(["pdftotext", "-layout", tf.name, outputTf.name ]).communicate()
        return outputTf.read()
    else :
        return None

pdf_file="files/2014_1.pdf"
file_object = file(pdf_file, 'rb')
print pdf_to_string(file_object)

这会产生正确的输出，人名然后位置:)。

<强>解决！