File creation and editing in Ignition

Ignition
2

Ignition has system functions for reading and writing files, which will work well for plain text files:

You should be able to use the readFileAsString and writeFile functions.

Word documents require a bit more work. There is a good example here showing how to use Apache POI within Ignition (no external library required):

I've modified it slightly to read a file, modify the ISBN and save it again:

import re
from java.io import FileOutputStream, FileInputStream, IOException
from org.apache.poi.xwpf.usermodel import XWPFDocument


filePath = "someFile.docx" #Modify this with your Word document file path

# New ISBN number to replace with
newISBN = "AAAAAAA"

# Regular expression pattern to match the ISBN number
pattern = re.compile(r'ISBN:\s*([a-zA-Z0-9]+)')

# Initialize file input and output streams outside the try block
fis = None
fos = None

try:
    # Load the Word document
    fis = FileInputStream(filePath)
    doc = XWPFDocument(fis)

    # Iterate through paragraphs
    for paragraph in doc.getParagraphs():
        
        # Concatenate text from all runs within the paragraph. Sometimes the search string isn't always in a single run.
        text = ""
        for run in paragraph.getRuns():
            text += run.getText(0)
		
        if text:
			
			
			# Use regex to find matches
			matches = pattern.findall(text)
			for match in matches:
				
			    # Replace only the ISBN number with the new ISBN
			    modified_text = text.replace(match, newISBN)
			
			# Clear existing runs in the paragraph
			for i in reversed(range(paragraph.getRuns().size())):
			    paragraph.removeRun(i)
			
			# Insert the modified text into a new run in the paragraph
			run = paragraph.createRun()
			run.setText(modified_text)

    # Save the modified document
    fos = FileOutputStream(location)
    doc.write(fos)

    print("ISBN replacement completed successfully.")

except IOException as e:
    e.printStackTrace()

finally:
    # Close streams in finally block to ensure they are always closed, even if an exception is thrown somewhere
    try:
        if fos:
            fos.close()
        if fis:
            fis.close()
    except IOException as e:
        e.printStackTrace()

Here is a link to the Apache POI documentation:
https://poi.apache.org/apidocs/dev/org/apache/poi/xwpf/usermodel/XWPFDocument.html