fix: remove leading slash from margin delist-schedule path

binance/client.py

@@ -5325,7 +5325,7 @@ def get_margin_delist_schedule(self, **params):
             ]
         """
         return self._request_margin_api(
-            "get", "/margin/delist-schedule", signed=True, data=params
+            "get", "margin/delist-schedule", signed=True, data=params
         )
 
     # Margin OCO

tests/test_delist_schedule.py

@@ -0,0 +1,48 @@
+import re
+
+import pytest
+import requests_mock
+from aioresponses import aioresponses
+
+from binance.client import Client
+from binance.async_client import AsyncClient
+
+EXPECTED = [
+    {
+        "delistTime": 1686161202000,
+        "crossMarginAssets": ["BTC", "USDT"],
+        "isolatedMarginSymbols": ["ADAUSDT", "BNBUSDT"],
+    }
+]
+
+# Exactly one slash between the version and the path segment.
+MARGIN_DELIST_URL = re.compile(
+    r"^https://api\.binance\.com/sapi/v1/margin/delist-schedule(\?.*)?$"
+)
+
+
+def test_get_margin_delist_schedule_url():
+    client = Client("api_key", "api_secret")
+    with requests_mock.mock() as m:
+        m.get(MARGIN_DELIST_URL, json=EXPECTED)
+        response = client.get_margin_delist_schedule()
+
+    assert response == EXPECTED
+    assert m.call_count == 1
+    assert "//margin" not in m.last_request.url
+
+
+@pytest.mark.asyncio()
+async def test_get_margin_delist_schedule_url_async():
+    client = AsyncClient("api_key", "api_secret")
+    try:
+        with aioresponses() as m:
+            m.get(MARGIN_DELIST_URL, payload=EXPECTED)
+            response = await client.get_margin_delist_schedule()
+
+        assert response == EXPECTED
+        requested = [str(key[1]) for key in m.requests]
+        assert len(requested) == 1
+        assert "//margin" not in requested[0]
+    finally:
+        await client.close_connection()