我正在尝试使用pdfminer从 pdf 中获取文本数据。我可以使用 pdfminer 命令行工具 pdf2txt.py 成功地将这些数据提取到 .txt 文件中。我目前这样做，然后使用 python 脚本清理 .txt 文件。我想将 pdf 提取过程合并到脚本中并为自己节省一步。
当我找到这个链接时，我以为我正在做某事，但我没有成功使用任何解决方案。也许那里列出的功能需要再次更新，因为我使用的是更新版本的 pdfminer。
我尝试的另一种方法是使用os.system. 这也没有成功。
我正在使用 Python 版本 2.7.1 和 pdfminer 版本 20110227。
这是一个适用于最新版本的新解决方案：
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from cStringIO import StringIO
def convert_pdf_to_txt(path):
rsrcmgr = PDFResourceManager()
retstr = StringIO()
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)
fp.close()
device.close()
str = retstr.getvalue()
retstr.close()
return str
这是我最终制作的对我有用的清理版本。以下只是简单地返回 PDF 中的字符串，给定它的文件名。我希望这可以节省一些时间。
from pdfminer.pdfinterp import PDFResourceManager, process_pdf
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from cStringIO import StringIO
def convert_pdf(path):
rsrcmgr = PDFResourceManager()
retstr = StringIO()
codec = 'utf-8'
laparams = LAParams()
device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
fp = file(path, 'rb')
process_pdf(rsrcmgr, device, fp)
fp.close()
device.close()
str = retstr.getvalue()
retstr.close()
return str
此解决方案在 2013 年 11 月 API 更改之前一直有效。
我知道回答你自己的问题很糟糕，但我想我可能已经想通了，我不希望其他人浪费时间寻找解决我问题的方法。
我遵循了我的问题中发布的链接之一中的建议，并重新利用了 pdfminer 中包含的当前 pdf2txt.py 脚本。这是功能，以防它对其他人有用。感谢用户 skyl 发布该答案，我所要做的就是进行一些更改以使其与当前版本的 pdfminer 一起使用。
此函数采用 pdf 并在同一目录中创建一个具有相同名称的 .txt 文件。
def convert_pdf(path, outtype='txt', opts={}):
import sys
from pdfminer.pdfparser import PDFDocument, PDFParser
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter, process_pdf
from pdfminer.pdfdevice import PDFDevice, TagExtractor
from pdfminer.converter import XMLConverter, HTMLConverter, TextConverter
from pdfminer.cmapdb import CMapDB
from pdfminer.layout import LAParams
import getopt
outfile = path[:-3] + outtype
outdir = '/'.join(path.split('/')[:-1])
# debug option
debug = 0
# input option
password = ''
pagenos = set()
maxpages = 0
# output option
# ?outfile = None
# ?outtype = None
outdir = None
#layoutmode = 'normal'
codec = 'utf-8'
pageno = 1
scale = 1
showpageno = True
laparams = LAParams()
for (k, v) in opts:
if k == '-d': debug += 1
elif k == '-p': pagenos.update( int(x)-1 for x in v.split(',') )
elif k == '-m': maxpages = int(v)
elif k == '-P': password = v
elif k == '-o': outfile = v
elif k == '-n': laparams = None
elif k == '-A': laparams.all_texts = True
elif k == '-V': laparams.detect_vertical = True
elif k == '-M': laparams.char_margin = float(v)
elif k == '-L': laparams.line_margin = float(v)
elif k == '-W': laparams.word_margin = float(v)
elif k == '-F': laparams.boxes_flow = float(v)
elif k == '-Y': layoutmode = v
elif k == '-O': outdir = v
elif k == '-t': outtype = v
elif k == '-c': codec = v
elif k == '-s': scale = float(v)
#
#PDFDocument.debug = debug
#PDFParser.debug = debug
CMapDB.debug = debug
PDFResourceManager.debug = debug
PDFPageInterpreter.debug = debug
PDFDevice.debug = debug
#
rsrcmgr = PDFResourceManager()
outtype = 'text'
if outfile:
outfp = file(outfile, 'w')
else:
outfp = sys.stdout
device = TextConverter(rsrcmgr, outfp, codec=codec, laparams=laparams)
fp = file(path, 'rb')
process_pdf(rsrcmgr, device, fp, pagenos, maxpages=maxpages, password=password,
check_extractable=True)
fp.close()
device.close()
outfp.close()
return
使用最新版本的 pdfminer（截至 2014 年 9 月），这对我有用：
from pdfminer.pdfparser import PDFParser
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdfpage import PDFPage
from pdfminer.pdfpage import PDFTextExtractionNotAllowed
from pdfminer.pdfinterp import PDFResourceManager
from pdfminer.pdfinterp import PDFPageInterpreter
from pdfminer.pdfdevice import PDFDevice
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
import unicodedata, codecs
from io import StringIO
def getPDFText(pdfFilenamePath):
retstr = StringIO()
parser = PDFParser(open(pdfFilenamePath,'r'))
try:
document = PDFDocument(parser)
except Exception as e:
print(pdfFilenamePath,'is not a readable pdf')
return ''
if document.is_extractable:
rsrcmgr = PDFResourceManager()
device = TextConverter(rsrcmgr,retstr, codec='ascii' , laparams = LAParams())
interpreter = PDFPageInterpreter(rsrcmgr, device)
for page in PDFPage.create_pages(document):
interpreter.process_page(page)
return retstr.getvalue()
else:
print(pdfFilenamePath,"Warning: could not extract text from pdf file.")
return ''
if __name__ == '__main__':
words = getPDFText(path)
这是我的解决方案
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
import os
def convert_pdf_to_txt(path, pages=None):
if not pages:
pagenums = set()
else:
pagenums = set(pages)
output = StringIO()
manager = PDFResourceManager()
converter = TextConverter(manager, output, laparams=LAParams())
interpreter = PDFPageInterpreter(manager, converter)
infile = open(path, 'rb')
for page in PDFPage.get_pages(infile, pagenums):
interpreter.process_page(page)
infile.close()
converter.close()
text = output.getvalue()
output.close()
return text
例如，您只想阅读 pdf 文件的前 3 页：
text = convert_pdf_to_txt('../Data/EN-FINAL Table 9.pdf', pages=[0,1,2])
pdfminer.six==20160614
蟒蛇：3.x
这是一个适用于pdfminer.six运行 python 3.6 的答案。pdfminer.high_level如果您只想从简单的 PDF 文件中获取原始文本，它使用的模块可以抽象出许多底层细节。
import pdfminer
import io
def extract_raw_text(pdf_filename):
output = io.StringIO()
laparams = pdfminer.layout.LAParams() # Using the defaults seems to work fine
with open(pdf_filename, "rb") as pdffile:
pdfminer.high_level.extract_text_to_fp(pdffile, output, laparams=laparams)
return output.getvalue()
以下对 non-process_pdf 答案的修改直接从 URL 字符串名称中提取文本，并适用于版本 20140328 和 Python 2.7：
from urllib2 import urlopen
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from cStringIO import StringIO
def convert_pdf_to_txt(url):
rsrcmgr = PDFResourceManager()
retstr = StringIO()
codec = 'utf-8'
laparams = LAParams()
device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
scrape = urlopen(url).read()
fp = StringIO(scrape)
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)
fp.close()
device.close()
textstr = retstr.getvalue()
retstr.close()
return textstr
以下代码适用于我最新版本的 PDFMiner，它采用 pdf 路径并以 .txt 格式返回文本。
PS：这是对上述答案的修改。
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from cStringIO import StringIO
def convert_pdf_to_txt(path, outtype='txt'):
outfile = path[:-3] + outtype
rsrcmgr = PDFResourceManager()
codec = 'utf-8'
laparams = LAParams()
if outfile:
outfp = file(outfile, 'w')
else:
outfp = sys.stdout
device = TextConverter(rsrcmgr, outfp, 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)
fp.close()
device.close()
outfp.close()
return
如果您正在通过 urllib2 处理抓取的数据，请试试这个（在此处开发和解释）：
def pdf_to_text(scraped_pdf_data):
from pdfminer.pdfinterp import PDFResourceManager, process_pdf
from pdfminer.pdfdevice import PDFDevice
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
import StringIO
fp = StringIO.StringIO()
fp.write(scraped_pdf_data)
fp.seek(0)
outfp = StringIO.StringIO()
rsrcmgr = PDFResourceManager()
device = TextConverter(rsrcmgr, outfp, laparams=LAParams())
process_pdf(rsrcmgr, device, fp)
device.close()
t = outfp.getvalue()
outfp.close()
fp.close()
return t
与其他答案一样，此处的代码适应了 PDFMiner 本身提供的 pdf2txt 实用程序。因此，您也可以转换为 html 或 xml - 只是 subHTMLConverter或XMLConverterforTextConverter上面的任何地方。
以防万一有人仍然需要这个，让它与请求和 python 3.4 一起工作。感谢@bahmait 在上面的回答:)
import requests
from io import StringIO
from pdfminer.pdfinterp import PDFResourceManager, process_pdf
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
def pdf_to_text(url=None):
text = None
pdf = requests.get(url)
if pdf.ok:
fp = StringIO(str(pdf.content, 'utf-8'))
outfp = StringIO()
rsrcmgr = PDFResourceManager()
device = TextConverter(rsrcmgr, outfp, laparams=LAParams())
process_pdf(rsrcmgr, device, fp)
device.close()
text = outfp.getvalue()
outfp.close()
fp.close()
return text
if __name__ == "__main__":
hello_world_text = pdf_to_text("https://bytebucket.org/hsoft/pdfminer3k/raw/28edfc91caed830674ca0b928f42571f7dee6091/samples/simple1.pdf")
no_pdf = pdf_to_text('http://www.google.com/404')
print(hello_world_text)
print(no_pdf)
这是我最终制作的对我有用的清理版本。以下只是简单地返回 PDF 中的字符串，给定它的文件名。我希望这可以节省一些时间。
from pdfminer.pdfinterp import PDFResourceManager, process_pdf
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from cStringIO import StringIO
def convert_pdf(path):
rsrcmgr = PDFResourceManager()
retstr = StringIO()
codec = 'utf-8'
laparams = LAParams()
device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
fp = file(path, 'rb')
process_pdf(rsrcmgr, device, fp)
fp.close()
device.close()
str = retstr.getvalue()
retstr.close()
return str
谁能告诉我：有没有要放置pdf文件的特定位置？
只有当有人仍然需要它时：如何使用 PDFMiner 从 PDF 打印 HTML：
import sys
import getopt
from Core.Interfaces.IReader import IReader
from pdfminer.pdfparser import PDFDocument, PDFParser
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter, process_pdf
from pdfminer.pdfdevice import PDFDevice, TagExtractor
from pdfminer.converter import XMLConverter, HTMLConverter, TextConverter
from pdfminer.cmapdb import CMapDB
from pdfminer.layout import LAParams
from cStringIO import StringIO
class PdfReader(object):
def __init__(self):
pass
def readText(self,path, outtype='text', opts={}):
outfile = path[:-3] + outtype
outdir = '/'.join(path.split('/')[:-1])
# debug option
debug = 0
# input option
password = ''
pagenos = set()
maxpages = 0
# output option
# ?outfile = None
# ?outtype = None
outdir = None
#layoutmode = 'normal'
codec = 'utf-8'
pageno = 1
scale = 1
showpageno = True
laparams = LAParams()
for (k, v) in opts:
if k == '-d': debug += 1
elif k == '-p': pagenos.update( int(x)-1 for x in v.split(',') )
elif k == '-m': maxpages = int(v)
elif k == '-P': password = v
elif k == '-o': outfile = v
elif k == '-n': laparams = None
elif k == '-A': laparams.all_texts = True
elif k == '-V': laparams.detect_vertical = True
elif k == '-M': laparams.char_margin = float(v)
elif k == '-L': laparams.line_margin = float(v)
elif k == '-W': laparams.word_margin = float(v)
elif k == '-F': laparams.boxes_flow = float(v)
elif k == '-Y': layoutmode = v
elif k == '-O': outdir = v
elif k == '-t': outtype = v
elif k == '-c': codec = v
elif k == '-s': scale = float(v)
print laparams
#
#PDFDocument.debug = debug
#PDFParser.debug = debug
CMapDB.debug = debug
PDFResourceManager.debug = debug
PDFPageInterpreter.debug = debug
PDFDevice.debug = debug
#
rsrcmgr = PDFResourceManager()
#outtype = 'text'
outfp = StringIO()
device = HTMLConverter(rsrcmgr, outfp, codec=codec, laparams=laparams)
fp = file(path, 'rb')
process_pdf(rsrcmgr, device, fp, pagenos, maxpages=maxpages, password=password,
check_extractable=True)
fp.close()
device.close()
print outfp.getvalue()
outfp.close()
return
reader = PdfReader()
opt = map(None,['-W','-L','-t'],[0.5,0.4,'html'])
reader.readText("/test_data/test.pdf","html",opt)
这个在 python 3 中为我工作。它需要 PDFMiner.six 包
pip install pdfminer.six
代码如下（和大家的代码一样，有小修正）：
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from six import StringIO
def convert_pdf_to_txt(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)
fp.close()
device.close()
str = retstr.getvalue()
retstr.close()
return str.replace("\\n","\n")
完全披露，我是pdfminer.six的维护者之一。它是用于 python 3 的 pdfminer 的社区维护版本。
如今，根据您的需要，它有多个 api 从 PDF 中提取文本。在幕后，所有这些 api 都使用相同的逻辑来解析和分析布局。
（所有示例都假定您的 PDF 文件名为example.pdf）
命令行
如果您只想提取一次文本，可以使用命令行工具 pdf2txt.py：
$ pdf2txt.py example.pdf
高级api
如果要使用 Python 提取文本（属性），可以使用高级 api。如果您想以编程方式从 PDF 中提取信息，这种方法是首选解决方案。
from pdfminer.high_level import extract_text
# Extract text from a pdf.
text = extract_text('example.pdf')
# Extract iterable of LTPage objects.
pages = extract_pages('example.pdf')
可组合的 API
还有一个可组合的 api，它在处理生成的对象时提供了很大的灵活性。例如，它允许您创建自己的布局算法。其他答案中建议使用此方法，但我只会在您需要自定义某些组件时推荐此方法。
from io import StringIO
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.pdfpage import PDFPage
from pdfminer.pdfparser import PDFParser
output_string = StringIO()
with open('example.pdf', 'rb') as in_file:
parser = PDFParser(in_file)
doc = PDFDocument(parser)
rsrcmgr = PDFResourceManager()
device = TextConverter(rsrcmgr, output_string, laparams=LAParams())
interpreter = PDFPageInterpreter(rsrcmgr, device)
for page in PDFPage.create_pages(doc):
interpreter.process_page(page)
print(output_string.getvalue())
以下代码片段能够使用最新版本的 pdfminer（截至 2016 年 3 月 23 日）从 pdf 文档中提取纯文本。希望这可以帮助。
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from cStringIO import StringIO
def convert_pdf_to_txt(path):
rsrcmgr = PDFResourceManager()
retstr = StringIO()
codec = 'utf-8'
laparams = LAParams()
device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
fp = file(path, 'rb')
parser = PDFParser(fp)
doc = PDFDocument(parser)
parser.set_document(doc)
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()
print text
return text
convert_pdf_to_txt(<path_of_the_pdf_file>)