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How to turn lines of text in PyQt6 QTextEdit into clickable links that call a function

A while back, I made [this post](https://software.codidact.com/posts/293660) about reading specified sections in a text file formatted a particular way.

I've since updated the format for that file to include links at the start of arbitrary lines within the section text, formatted as `{sectionNumber some text}`. The problem is, I now need to make those links actually work. The idea is that when someone clicks on a link, it calls the readSection() function with the section number specified in the link passed as a parameter.

For example: the line formatted as `{2 Go to section 2}` would show up as `Go to section 2` (already handled; see below) and when it's clicked, it would invoke tthe function `readSection(2)`.

Here's the code I have so far:

```
def readSection(sectionNumber):
	global myFile
	with open(myFile) as file: # Open the file
		firstLineNumber = None # Create a variable for the first line number of the section
		sectionLines = [] # Create a variable for listing all the lines in the section
		for lineNumber, line in enumerate(file, start=1): # Iterate over every line and line number in the file
			if line.startswith('[' + str(sectionNumber)): # If the line starts with a [ and the section number...
				firstLineNumber = lineNumber # Mark the first line number as found
				sectionLines.append(line) # Add the line to the list
			elif line[0] == ']' and firstLineNumber: # If the line starts with a ] and the first line number is marked as found...
				sectionLines.append(line) # Add the line to the list
				break # Break the for loop, since first and last line numbers have been found
			elif firstLineNumber is not None: # If the first line has been added and the last one hasn't...
				if line.startswith('{'): # If the line is a link...
					line = line[3:] # Slice the first three characters from it (the opening bracket, page number, and extra space)
					line = line.replace('}', '') # Remove the closing bracket
				sectionLines.append(line) # Add the line to the list
		sectionLines.pop(0) # Remove the line starting with [ and the section number from the section lines
		sectionLines.pop(-1) # Remove the line starting with ] from the section lines
		newSection = "".join(sectionLines) # Turn the list of lines into a prettier looking section
		window.buffer.setText(newSection) # Insert it into the QTextEdit
```

I was thinking I could use toMarkdown() or toHtml() on the QTextEdit, replace the links with those respective formats, and then intercept the link activation events somehow, but I've done a lot of experimenting and researching and can't get this to work.