[deploy] delay tkinter import when calling neurojgui, bump 0.8.1

Author: fangq

README.md

@@ -4,7 +4,7 @@
 
 - Copyright: (C) Qianqian Fang (2019-2025) <q.fang at neu.edu>
 - License: Apache License, Version 2.0
-- Version: 0.8.0
+- Version: 0.8.1
 - URL: https://github.com/NeuroJSON/pyjdata
 - Acknowledgement: This project is supported by US National Institute of Health (NIH)
   grant [U24-NS124027](https://reporter.nih.gov/project-details/10308329)

jdata/__init__.py

@@ -121,7 +121,7 @@
 
 from .neurojson import neuroj, neurojgui
 
-__version__ = "0.8.0"
+__version__ = "0.8.1"
 __all__ = [
     "loadjson",
     "savejson",

jdata/neurojson.py

@@ -284,10 +284,13 @@ class neurojgui:
     GUI class for NeuroJSON browser
     """
 
-    import tkinter as tk
-    from tkinter import messagebox
-
     def __init__(self):
+        import tkinter as tk
+        from tkinter import messagebox
+
+        self.tk = tk
+        self.messagebox = messagebox
+
         self.root = self.tk.Tk()
         self.root.title("NeuroJSON.io Dataset Browser")
         self.root.geometry("800x600")

setup.py

@@ -6,7 +6,7 @@
 setup(
     name="jdata",
     packages=["jdata"],
-    version="0.8.0",
+    version="0.8.1",
     license="Apache license 2.0",
     description="JSON/binary JSON formats for exchanging Python and Numpy data",
     long_description=readme,