handle frozenset

Author: quangngd

pandas/io/formats/printing.py

@@ -111,6 +111,8 @@ def _pprint_seq(
     """
     if isinstance(seq, set):
         fmt = "{{{body}}}"
+    elif isinstance(seq, frozenset):
+        fmt = "frozenset({body})"
     else:
         fmt = "[{body}]" if hasattr(seq, "__setitem__") else "({body})"