Add doctest for Path in load() and prevent URL fetch for Path objects

Co-authored-by: edgarcosta <[email protected]>

Author: Copilot

src/sage/misc/persist.pyx

@@ -160,6 +160,16 @@ def load(*filename, compress=True, verbose=True, **kwargs):
         sage: load(t)                                                                   # needs numpy
         sage: hello                                                                     # needs numpy
         <fortran ...>
+
+    Path objects are supported::
+
+        sage: from pathlib import Path
+        sage: import tempfile
+        sage: with tempfile.TemporaryDirectory() as d:
+        ....:     p = Path(d) / "test_path"
+        ....:     save(1, p)
+        ....:     load(p)
+        1
     """
     import sage.repl.load
     if len(filename) != 1:
@@ -172,15 +182,17 @@ def load(*filename, compress=True, verbose=True, **kwargs):
         return
 
     filename = filename[0]
-    filename = os.fspath(filename)  # Convert path-like objects to strings
+    is_path_like = hasattr(filename, '__fspath__')
+    filename = os.fspath(filename)
 
     if sage.repl.load.is_loadable_filename(filename):
         sage.repl.load.load(filename, globals())
         return
 
     # Check if filename starts with "http://" or "https://"
+    # (but skip this check if the original input was a Path object)
     lower = filename.lower()
-    if lower.startswith("http://") or lower.startswith("https://"):
+    if not is_path_like and (lower.startswith("http://") or lower.startswith("https://")):
         from sage.misc.remote_file import get_remote_file
         filename = get_remote_file(filename, verbose=verbose)
         tmpfile_flag = True