eww clock no longer spawns a new process every 0.5 seconds

.config/eww/modules/clock.yuck

@@ -1,6 +1,6 @@
 ;; -*-lisp-*-
-(defpoll clock--data :interval "500ms"
-   `date +'{"hour": "%H", "minute": "%M", "second": "%S", "year": "%Y", "day": "%d", "month": "%m", "dow": "%A", "month_name": "%B", "unix": %s}'`)
+(deflisten clock--data :initial "{}"
+   `~/.config/eww/scripts/date.py`)
 
 (defvar clock--show "clock")
 

.config/eww/scripts/date.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""A simple Python script to output the current date and time as a JSON object string every 0.5 seconds.
+
+Used instead of the `date` command in order to avoid spawning a new process every 0.5 seconds.
+"""
+
+import datetime
+import sys
+import time
+
+
+def get_date():
+    """Return the current date as a JSON object string."""
+    return datetime.datetime.now().strftime(
+        '{"hour": "%H", "minute": "%M", "second": "%S", "day": "%d", "month": "%m", "year": "%Y", "dow": "%w","month_name": "%B", "unix": %s}'
+    )
+
+
+if __name__ == "__main__":
+    while True:
+        print(get_date())
+        sys.stdout.flush()
+        time.sleep(0.5)