Problem With Closing Python Pypdf - Writing. Getting A ValueError: I/O Operation On Closed File

can't figure this up this function (part of class for scraping internet site into a pdf) supposed to merge the pdf file generated from web pages using pypdf. this is the method co

Solution 1:

OK, I found your problem. You were right to call file(). Don't try to call open() at all.

Your problem is the input file still needs to be open when you call self.pdfoutput.write(self._pdfstream), so you need to remove the line self._filestream.close().

Edit: This script will trigger the problem. The first write will succeed and the second will fail.

from pyPdf import PdfFileReader as PfR, PdfFileWriter as PfW

input_filename = 'in.PDF' # replace with a real file
output_filename = 'out.PDF' # something that doesn't exist

infile = file(input_filename, 'rb')
reader = PfR(infile)
writer = PfW()

writer.addPage(reader.getPage(0))
outfile = file(output_filename, 'wb')
writer.write(outfile)
print "First Write Successful!"
infile.close()
outfile.close()

infile = file(input_filename, 'rb')
reader = PfR(infile)
writer = PfW()

writer.addPage(reader.getPage(0))
outfile = file(output_filename, 'wb')
infile.close() # BAD!

writer.write(outfile)
print "You'll get an IOError Before this line"
outfile.close()