change mut arg on None and added checker is None

python-caldav · Jun 12, 2024 · 7681cd9 · 7681cd9
1 parent 2a0e159
commit 7681cd9
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/caldav/davclient.py b/caldav/davclient.py
@@ -618,11 +618,14 @@ def request(
         url: str,
         method: str = "GET",
         body: str = "",
-        headers: Mapping[str, str] = {},
+        headers: Mapping[str, str] = None,
     ) -> DAVResponse:
         """
         Actually sends the request, and does the authentication
         """
+        if headers is None:
+            headers = {}
+
         combined_headers = self.headers.copy()
         combined_headers.update(headers)
         if (body is None or body == "") and "Content-Type" in combined_headers: