将 PDF 文件转换为 .txt python 3

Question

from io import StringIO
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter

from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
import os
import sys, getopt

#converts pdf, returns its text content as a string
def convert(fname, 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)

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

def convertMultiple(pdfDir, txtDir):
    if pdfDir == "": pdfDir = os.getcwd() + "\\" #if no pdfDir passed in 
    for pdf in os.listdir(pdfDir): #iterate through pdfs in pdf directory
        fileExtension = pdf.split(".")[-1]
        if fileExtension == "pdf":
            pdfFilename = pdfDir + pdf 
            text = convert(pdfFilename) #get string of text content of pdf
            textFilename = txtDir + pdf + ".txt"
            textFile = open(textFilename, "w") #make text file
            textFile.write(text) #write text to text file
            #textFile.close

pdfDir = (r"FK_EPPS")
txtDir = (r"FK_txt")
convertMultiple(pdfDir, txtDir)

I tried to convert multiple pdf files called FK_EPPS into txt files and write it in different folder called FK_txt. But it says that there is no such files or directory. I put the folder exactly in those path. I try find the solution but still there is an error. Can you help me why this is happen?

/usr/local/lib/python2.7/dist-packages/pdfminer/__init__.py:20: UserWarning: On January 1st, 2020, pdfminer.six will stop supporting Python 2. Please upgrade to Python 3. For more information see https://github.com/pdfminer/pdfminer.six/issues/194
  warnings.warn('On January 1st, 2020, pdfminer.six will stop supporting Python 2. Please upgrade to Python 3. For '
Traceback (most recent call last):
  File "/home/a1-re/Documents/pdftotext/1.py", line 44, in <module>
    convertMultiple(pdfDir, txtDir)
  File "/home/a1-re/Documents/pdftotext/1.py", line 36, in convertMultiple
    text = convert(pdfFilename) #get string of text content of pdf
  File "/home/a1-re/Documents/pdftotext/1.py", line 21, in convert
    filepath = file(fname, 'rb')
IOError: [Errno 2] No such file or directory: 'pdf1831150030.pdf'

Answer 1

(There is no way the traceback that you show is correct. With your sample input, the error should have contained FK_EPPS at the start.)

You forget that a path and filename must be separated from each other with the appropriate separator for your OS.

You could immediately have seen this if you had printed out the value of fname at the start of that convert function. You make the same mistake for the text output filename, but that would be harder to notice because it would not yield an error, but only create a wrong filename.