Question

我使用了GitHub中pdfminer软件包中的“ pdf2txt.py”程序来尝试将pdf文件转换为文本。按照说明，我通过键入“ python pdf2txt.py somefile.pdf”来运行该程序。在Mac OS终端中。正确生成了输出并将其打印在终端本身中。现在我的问题是，如何将输出定向到文本文件中，我只了解python的基本知识，而我无法弄清楚程序中的哪一行实际打印输出以及需要更改哪些内容才能定向相同的.txt文件？

import argparse
import logging
import six
import sys
import pdfminer.settings
pdfminer.settings.STRICT = False
import pdfminer.high_level
import pdfminer.layout
from pdfminer.image import ImageWriter


def extract_text(files=[], outfile='-',
        _py2_no_more_posargs=None,  # Bloody Python2 needs a shim
        no_laparams=False, all_texts=None, detect_vertical=None, # LAParams
        word_margin=None, char_margin=None, line_margin=None, boxes_flow=None, # LAParams
        output_type='text', codec='utf-8', strip_control=False,
        maxpages=0, page_numbers=None, password="", scale=1.0, rotation=0,
        layoutmode='normal', output_dir=None, debug=False,
        disable_caching=False, **other):
if _py2_no_more_posargs is not None:
    raise ValueError("Too many positional arguments passed.")
if not files:
    raise ValueError("Must provide files to work upon!")

# If any LAParams group arguments were passed, create an LAParams object and
# populate with given args. Otherwise, set it to None.
if not no_laparams:
    laparams = pdfminer.layout.LAParams()
    for param in ("all_texts", "detect_vertical", "word_margin", "char_margin", "line_margin", "boxes_flow"):
        paramv = locals().get(param, None)
        if paramv is not None:
            setattr(laparams, param, paramv)
else:
    laparams = None

imagewriter = None
if output_dir:
    imagewriter = ImageWriter(output_dir)

if output_type == "text" and outfile != "-":
    for override, alttype in (  (".htm", "html"),
                                (".html", "html"),
                                (".xml", "xml"),
                                (".tag", "tag") ):
        if outfile.endswith(override):
            output_type = alttype

if outfile == "-":
    outfp = sys.stdout
    if outfp.encoding is not None:
        codec = 'utf-8'
else:
    outfp = open(outfile, "wb")


for fname in files:
    with open(fname, "rb") as fp:
        pdfminer.high_level.extract_text_to_fp(fp, **locals())
return outfp


def maketheparser():
parser = argparse.ArgumentParser(description=__doc__, add_help=True)
parser.add_argument("files", type=str, default=None, nargs="+", help="File to process.")
parser.add_argument("-d", "--debug", default=False, action="store_true", help="Debug output.")
parser.add_argument("-p", "--pagenos", type=str, help="Comma-separated list of page numbers to parse. Included for legacy applications, use --page-numbers for more idiomatic argument entry.")
parser.add_argument("--page-numbers", type=int, default=None, nargs="+", help="Alternative to --pagenos with space-separated numbers; supercedes --pagenos where it is used.")
parser.add_argument("-m", "--maxpages", type=int, default=0, help="Maximum pages to parse")
parser.add_argument("-P", "--password", type=str, default="", help="Decryption password for PDF")
parser.add_argument("-o", "--outfile", type=str, default="-", help="Output file (default \"-\" is stdout)")
parser.add_argument("-t", "--output_type", type=str, default="text", help="Output type: text|html|xml|tag (default is text)")
parser.add_argument("-c", "--codec", type=str, default="utf-8", help="Text encoding")
parser.add_argument("-s", "--scale", type=float, default=1.0, help="Scale")
parser.add_argument("-A", "--all-texts", default=None, action="store_true", help="LAParams all texts")
parser.add_argument("-V", "--detect-vertical", default=None, action="store_true", help="LAParams detect vertical")
parser.add_argument("-W", "--word-margin", type=float, default=None, help="LAParams word margin")
parser.add_argument("-M", "--char-margin", type=float, default=None, help="LAParams char margin")
parser.add_argument("-L", "--line-margin", type=float, default=None, help="LAParams line margin")
parser.add_argument("-F", "--boxes-flow", type=float, default=None, help="LAParams boxes flow")
parser.add_argument("-Y", "--layoutmode", default="normal", type=str, help="HTML Layout Mode")
parser.add_argument("-n", "--no-laparams", default=False, action="store_true", help="Pass None as LAParams")
parser.add_argument("-R", "--rotation", default=0, type=int, help="Rotation")
parser.add_argument("-O", "--output-dir", default=None, help="Output directory for images")
parser.add_argument("-C", "--disable-caching", default=False, action="store_true", help="Disable caching")
parser.add_argument("-S", "--strip-control", default=False, action="store_true", help="Strip control in XML mode")
return parser


# main


def main(args=None):

P = maketheparser()
A = P.parse_args(args=args)

if A.page_numbers:
    A.page_numbers = set([x-1 for x in A.page_numbers])
if A.pagenos:
    A.page_numbers = set([int(x)-1 for x in A.pagenos.split(",")])

imagewriter = None
if A.output_dir:
    imagewriter = ImageWriter(A.output_dir)

if six.PY2 and sys.stdin.encoding:
    A.password = A.password.decode(sys.stdin.encoding)

if A.output_type == "text" and A.outfile != "-":
    for override, alttype in (  (".htm",  "html"),
                                (".html", "html"),
                                (".xml",  "xml" ),
                                (".tag",  "tag" ) ):
        if A.outfile.endswith(override):
            A.output_type = alttype

if A.outfile == "-":
    outfp = sys.stdout
    if outfp.encoding is not None:
        # Why ignore outfp.encoding? :-/ stupid cathal?
        A.codec = 'utf-8'
else:
    outfp = open(A.outfile, "wb")

## Test Code
outfp = extract_text(**vars(A))
outfp.close()
return 0


if __name__ == '__main__': sys.exit(main())

Answer 1

尝试

python pdf2txt.py somefile.pd > pdf_text.txt

Answer 2

感谢大家的投入。我加了一行

sys.stdout=open("somefile.txt","w")

在行前

outfp=sys.stdout.

像魅力一样工作。

如何更改python程序以将输出写入文件？

2 个答案: