Difference between revisions of "Python-for-Automation/C2/File-Conversion/English"

Welcome

Learning Objectives

• Convert JPG images to PNG format
• Extract text from PDF file and convert to audio
• Convert a PDF file to DOCX format

System Requirements

• Ubuntu Linux OS version 22.04
• Python 3.12.3

https://www.spoken-tutorial.org

• You must have basic knowledge of using Linux Terminal and Python
• For pre-requisite Linux and Python Tutorials, please visit this website
• Python libraries required for automation must be installed

Code Files

• The files used in this tutorial are provided in the Code files link.
• Please download and extract the files.
• Make a copy and then use them while practicing.

This can involve changing the file type, the structure of its contents, or both.

This makes the file compatible with different applications and user requirements.

File Conversion - Libraries

• PyPDF2 to handle PDF manipulation
• Pyttsx3 to help with extracting content
• Pdfplumber to convert the text to speech
• PILfor image processing and manipulation
• pdf2docx to convert PDF files to DOCX format
• os handles file manipulation and operating system interactions

Install - espeak package

• sudo apt-get update
• sudo apt-get install espeak

Please install it using the following commands.

Files App Downloads Folder logo.jpg

Logo.jpg is the file which we use for this demonstration.

Right Click on the image and then select properties to see the type of image.

This is a JPG.

Files App Downloads Folder imgconversion.py

Open the Text Editor with the source file

Now, we will go through the source code in the text editor.

from PIL import Image

def conversion(input_file, output_file):

Here input_file is a JPG file and the output_file will be in PNG format.

with Image.open(input_file) as img:

img.save(output_file, "PNG")

print("Conversion successful.")

except FileNotFoundError:

print("Error: Input file not found.")

except Exception as e:

print(f"An error occurred: {str(e)}")

input_file = "logo.jpg"

output_file = "logo_converted.png"

conversion(input_file, output_file)

Let us execute the program and see the result.

Start Virtual Environment

Type

source Automation/bin/activate

We will open the virtual environment we created for the Automation series. Type source space Automation forward slash bin forward slash activate. Then press enter.

Type

cd Downloads

python3 imgconversion.py

Then type python3 imgconversion.py and press Enter to run the code.

Let us check the output image.

Files App Downloads Folder logo_converted.png

The image is the same as the one we provided as input.

However, the format is saved as PNG.

Let us check the properties of this image as well to confirm the image type.

This is a PNG.

Files App Downloads Folder test.pdf

You can download it from the code file section and use it or you can create one with some basic text.

Files App Downloads Folder pdftoaudio.py

Open the Text Editor with the source file

Let us review it in the text editor.

import pyttsx3

import pdfplumber

from PyPDF2 import PdfReader

file = 'test.pdf'

all_text = []

s = pyttsx3.init()

pdf_reader = PdfReader(file)

pages = len(pdf_reader.pages)

with pdfplumber.open(file) as pdf:

for i in range(pages): page = pdf.pages[i] text = page.extract_text()

if text:

all_text.append(text)

print(f"\n{text}\n")

audio_file_name = f'audio_page_{i + 1}.mp3'

s.save_to_file(text, audio_file_name)

s.runAndWait()

except FileNotFoundError:

print('File not found. Please check the file path and name.')

except Exception as e:

print(f'An error occurred: {str(e)}')

print('Audio files saved successfully.')

python3 pdftoaudio.py

Let us execute the program.

Now, type python3 pdftoaudio.py to run your code.

Listen to the Output

The text from thePDF is converted to audio using the text to speech engine.

Files App Downloads Folder audio_page_1.mp3

Play the audio File

The saved file being an audio file, we can play and pause the MP3 file as we please.

Let us play the audio file.

Files App Downloads Folder newsletter.pdf

Let us now look at the code that will convert this PDF to a word document.

from pdf2docx import Converter

def pdf_to_docx(pdf_file, docx_file):

cv = Converter(pdf_file)

cv.convert(docx_file)

cv.close()

print(f'Conversion complete: {pdf_file} to {docx_file}')

pdf_file = newsletter.pdf' docx_file = 'doc_output_text.docx'

pdf_to_docx(pdf_file, docx_file)

Type:

python3 pdftodoc.py

Highlight:Conversion Complete

Once the code is executed, we see a message which indicates the conversion was completed.

Files App Downloads Folder

As we can see, it has the same content as the PDF had earlier but in a doc file.

Earlier, it was not editable because it was in a PDF format.

Now that it is a doc file, we can edit it.

Let us change the date to August 2024.

Type

deactivate

Type deactivate.

Summary

In this tutorial, we have learnt to

• Convert JPG images to PNG format
• Extract text from PDF file and convert to audio
• Convert a PDF file to DOCX format

Assignment

• Take a GIF and convert it to an image in PNG format.
• Take a PDF of your favorite book and convert it to an audio book.

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Acknowledgement

Thank You

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