On Monday, 22 February 2016 19:05:24 UTC+5:30, Peter Otten wrote:
> Arshpreet Singh wrote:
>
> > Hi, I am converting PDF into text file, I am using following code.
> >
> > from pypdf2 import PdfFileReader
> >
> > def read_pdf(pdfFileName):
> >
> > pdf = PdfFileReader(pdfFileName)
> >
> > yield from (pg.extractText() for pg in pdf.pages)
> >
> > for i in read_pdf('book.pdf'):
> > print(i)
> >
> > I want to avoid for loop , I also tried to create another function and
> > call read_pdf() inside that new function using yield from but I think I am
> > missing real picture here
>
> While it is possible to replace the loop with
>
> next(filter(print, read_pdf("book.pdf")), None)
Why we are w=using filter here?
> or the slightly less convoluted
>
> sys.stdout.writelines(map("{}\n".format, read_pdf("book.pdf")))
Actually I am using this function in Android App which is being built using
Kivy, Where I am returning whole text into a file, So what you think will be
more efficient way?
> the for loop is the obvious and therefore recommended solution. Personally,
> I would also replace
>
> > yield from (pg.extractText() for pg in pdf.pages)
>
> with the good old
>
> for pg in pdf.pages:
> yield pg.extractText()
>
> and reserve the generator expression for occasions where it has a
> demonstrable advantage in readability.
But when I am calling pdf_read() from nother function to avoid for loop why it
is not working?
say:
def hello()
yield from read_pdf('book.pdf')
print(hello()) # still returns memory location instead of text. If I am not
wrong yield from can be used to avoid for loop?
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