Pythonista editor script to paste clipboard to buffer.

paste.py

#paste clipboard to buffer.
import clipboard
import editor

cliptext = clipboard.get()
if cliptext != '':
	text = editor.get_text()
	selection = editor.get_selection()
	selected_text = text[selection[0]:selection[1]]
	replacement = cliptext + selected_text
	
	editor.replace_text(selection[0], selection[1], replacement)
#	editor.set_selection(selection[0], selection[0] + len(replacement) - 1)

I find it easier to paste with this command rather than attempting to use the popup menu.

# Paste the current clipboard text into the editor replacing the current selection.
import clipboard, editor
cliptext = clipboard.get()
if cliptext:
    selection = editor.get_selection()
    editor.replace_text(selection[0], selection[1], cliptext)