"""
    -- Simple calculator for use under Notepad++.
    
    Select text that contains a valid Python arithmetic expression
    and execute this script. 
    
    Result is inserted between selected text and text following it.
    
    I assigned the script to the key combination: `Alt+Num +`
    
    Sample expression: (-(1.0 + 2) * 3 + 55.0) / (8**2) = 0.71875
"""
from Npp import *

expression = editor.getSelText() 
if len(expression) == 0:
    notepad.messageBox('No expression selected') 
else:    
    try:
        answer = str(eval(expression))
    except SyntaxError as err: 
        console.write(err.args[0]+": "+err.args[1][3]+"\r\n")
        editor.addText(' *Error* ')
    else:    
        editor.addText(' = ' + answer)

There is an alpha version of PythonScript which uses a bundled Python 3 DLL instead of a bundled Python 2 DLL – just look at the releases page and grab the most recent alpha.

@Paul-Wormer

I’ve been using the Python Script v3.0.7 for some time now and it works great. The plugin finds your system python libraries in its search path. But as @PeterJones says this is primarily for automating N++ with Python.

Cheers.

I’m sorry for not expressing myself more clearly: I’m not looking for a Python IDE. The point is, I like to work with a personalized editor. For many years I worked with IBM-CMS/Xedit and MS/Kedit and over the years I wrote many, many edit macros in Rexx.

I have no longer access to Xedit and gave up on Kedit, because, unfortunately, it does not support Unicode. So, what I’m looking for, really, is a replacement for my beloved Kedit/Rexx and I hope to find it in the tandem Notepad++/Python. (I will keep on running Python from the cmd line.)

There is an alpha version of PythonScript which uses a bundled Python 3 DLL instead of a bundled Python 2 DLL – just look at the releases page and grab the most recent alpha.

But maybe you are misunderstanding the purpose of PythonScript plugin. It is not primarily for doing your “normal” Python programming. For that, you don’t need the plugin, you just type Python in Notepad++ as normal, and then run your script using your own Python interpreter – you can use a plugin like NppExec to run the script in a console inside Notepad++ itself if that’s what you like, but you don’t even need that.

The purpose of the PythonScript is for automating Notepad++ – like macros, but on steroids: it is using Python 2 as the scripting language for controlling Notepad++. So you’re really just using the Python 2 for the “glue language” for accessing the methods on the notepad and editor objects that they provide. So any differences in syntax would have minimal impact on your pythonscript scripts for NPP. Though, admittedly, sometimes it’s the small differences between what you’re used to and what you have available that make the most annoyances.