如何在Python / Django中逐行读取pdf文件？

Question

I am dealing with the text and pdf file equal or less than 5KB . If the file is a text file, I get a file from the form and get the required input in a string to summarize:

 file = file.readlines()
 file = ''.join(file)
 result = summarize(file, num_sentences)

It's easily done but for pdf file it turns out it's not that easy. Is there a way to get the sentences of pdf file as a string like I did with my txt file in Python/Django?

Answer 1

I dont think its possible to read pdfs just the way you are doing it with txt files, you need to convert the pdfs into txt files(refer Python module for converting PDF to text ) and then process it. you can also refer to this to convert pdf to txt easily http://code.activestate.com/recipes/511465-pure-python-pdf-to-text-converter/

Answer 2

In Django you can do this:

views.py :

def upload_pdf():
     if request.method == 'POST' and request.FILES['myfile']:
        pdfFileObj = request.FILES['myfile'].read() 
        pdfReader = PyPDF2.PdfFileReader(io.BytesIO(pdfFileObj))
        NumPages = pdfReader.numPages
        i = 0
        content = []
        while (i<NumPages):
            text = pdfReader.getPage(i)
            content.append(text.extractText())
            i +=1
       # depends on what you want to do with the pdf parsing results
       return render(request, .....) 

html part:

<form method="post" enctype="multipart/form-data" action="/url">
    {% csrf_token %}
      <input  type="file" name="myfile"> # the name is the same as the one you put in FILES['myfile']
    <button class="butto" type="submit">Upload</button>
</form>

In Python you can simply do this :

fileName = "path/test.pdf"
pdfFileObj = open(fileName,'rb')
pdfReader = PyPDF2.PdfFileReader(pdfFileObj)
NumPages = pdfReader.numPages

i = 0
content = []
while (i<NumPages):
    text = pdfReader.getPage(i)
    content.append(text.extractText())
    i +=1