pdf automation using python

[sagarbangade]

I want to automat process of pdf data extraction using python
it should extract headings and there contents Dictionary
output should looks like this :
{ '1st heading' : '1st heading content', '2nd heading' : '2nd heading content'}

pdfs will be in random structure

give me suggestions how can I do this work

[goldenflo]

Creating PDFs:

Report Lab: This library allows you to create[]( PDF documents (https://vytcdc.us/python-online-training/)))from scratch.
python
**Copy code**
from reportlab. pdf gen import canvas

def create_pdf(file_path):
c = canvas.Canvas(file_path)
c.drawString(100, 750, "Hello, world!")
c.save()

create_pdf("example.pdf")
Reading PDFs:

PyPDF2: This library allows you to manipulate existing PDF files.
python
Copy code
import PyPDF2

def read_pdf(file_path):
with open(file_path, 'rb') as file:
pdf_reader = PyPDF2.PdfFileReader(file)
num_pages = pdf_reader.numPages
for page_num in range(num_pages):
page = pdf_reader.getPage(page_num)
print(page.extractText())

read_pdf("example.pdf")
Editing PDFs:

PyPDF2: You can also use PyPDF2 to edit existing PDF files, such as merging or rotating pages.
python
Copy code
import PyPDF2

def merge_pdfs(input_paths, output_path):
pdf_merger = PyPDF2.PdfFileMerger()
for path in input_paths:
pdf_merger.append(path)
with open(output_path, 'wb') as output_file:
pdf_merger.write(output_file)

merge_pdfs(["file1.pdf", "file2.pdf"], "merged.pdf")
PDF Text Extraction:

PyMuPDF (MuPDF): This library is good for extracting text from PDF files.
python
Copy code
import fitz # PyMuPDF

def extract_text(file_path):
doc = fitz.open(file_path)
text = ""
for page_num in range(doc.page_count):
page = doc[page_num]
text += page.get_text()
return text

text_content = extract_text("example.pdf")
PDF Form Filling:

PyPDF2 or pdfrw: You can use these libraries to fill out form fields in a PDF.
python
Copy code
import PyPDF2

def fill_form(input_path, output_path, field_data):
pdf_reader = PyPDF2.PdfFileReader(input_path)
pdf_writer = PyPDF2.PdfFileWriter()

page = pdf_reader.getPage(0)
page.updatePageFormFieldValues(field_data)

pdf_writer.addPage(page)

with open(output_path, 'wb') as output_file:
    pdf_writer.write(output_file)

form_data = {'FieldName': 'New Value'}
fill_form("form_template.pdf", "filled_form.pdf", form_data)
Remember to install the necessary libraries using pip install library_name before using them. Adjust the code according to your specific needs and PDF structure.

[sagarbangade]

My Question was how can I extract headings and there respective paragraphs from pdf file using python.

[goldenflo]

If you want to simplify the approach and make it more straightforward, you can use the PyMuPDF library to extract text from each page and then manually iterate through the text to identify headings and paragraphs. Here's a simplified version:

python
Copy code
import fitz # PyMuPDF

def extract_ headings_ https://vytcdc.us/python-online-training/ and_ paragraphs(pdf_ path):
headings and paragraphs = []
doc = fitz. open (pdf_path)

for page_number in range(doc.page_count):
    page = doc[page_number]
    text = page.get_text()

    # Split the text into lines and identify headings and paragraphs
    lines = text.split('\n')
    current_heading = None
    current_paragraph = ""

    for line in lines:
        # Adjust the condition to identify headings based on your PDF structure
        if line.startswith("Heading"):
            # Save the previous heading and paragraph
            if current_heading is not None:
                headings_and_paragraphs.append({'heading': current_heading, 'paragraph': current_paragraph.strip()})

            # Update the current heading
            current_heading = line.strip()
            current_paragraph = ""
        else:
            # Concatenate lines to form the paragraph
            current_paragraph += line + ' '

    # Save the last heading and paragraph on each page
    if current_heading is not None:
        headings_and_paragraphs.append({'heading': current_heading, 'paragraph': current_paragraph.strip()})

doc.close()
return headings_and_paragraphs

Example usage

pdf_path = 'path/to/your/pdf_file.pdf'
result = extract_headings_and_paragraphs(pdf_path)

for entry in result:
print(f"Heading: {entry['heading']}")
print(f"Paragraph: {entry['paragraph']}")
print()
This approach simplifies the use of regular expressions and relies on basic string manipulation. Adjust the conditions and logic inside the loop based on the specific structure of your PDF files. Keep in mind that this simplified method assumes a straightforward structure and may not cover all possible variations in PDF formats.

[jsvine]

Hi @sagarbangade, PDFs come in many layouts, and many/most do not make their headings programmatically explicit. For this, you'll need to write custom code/heuristics to identify the parts of the PDF you care about. pdfplumber can help by providing access to useful attributes of each character (via page.chars), such as fontname, size, non_stroking_color, mcid, etc.