add uuid4 basic functionality

client_code/uuid.py

@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright (c) 2021 The Anvil Extras project team members listed at
+# https://github.com/anvilistas/anvil-extras/graphs/contributors
+#
+# This software is published at https://github.com/anvilistas/anvil-extras
+
+from anvil.js.window import Function as _F
+
+from .utils._component_helpers import _add_script
+
+__version__ = "1.3.1"
+
+from time import time
+
+js_uuid4, js_uuid_parse = _F(
+    """
+return new Promise(resolve => {
+    window.anvilExtrasResolve = resolve;
+    const s = document.createElement('script');
+    s.type = "module";
+    s.textContent = `
+        import { v4, parse } from 'https://jspm.dev/uuid@8.3.2';
+        window.anvilExtrasResolve([v4, parse]);
+    `
+    document.body.appendChild(s);
+  });
+"""
+)()
+
+
+class UUID(str):
+    def __repr__(self):
+        return "UUID('" + self + "')"
+
+    @property
+    def bytes(self):
+        return js_uuid_parse(self)
+
+
+def uuid4():
+    """returns a uuid"""
+    return UUID(js_uuid4())