BUG: Restore duck typing

Restore duck typing for fname
pandas-dev · Jan 16, 2020 · 3780cbe · 3780cbe
1 parent 8043174
commit 3780cbe
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
@@ -1881,12 +1881,12 @@ def _open_file_binary_write(fname: FilePathOrBuffer) -> Tuple[BinaryIO, bool]:
     own : bool
         True if the file was created, otherwise False
     """
-    if isinstance(fname, IOBase):
-        return fname, False
+    if hasattr(fname, "write"):
+        return fname, False  # type: ignore
     elif isinstance(fname, (str, Path)):
         return open(fname, "wb"), True
     else:
-        raise ValueError("fname must be a binary file, buffer or path-like.")
+        raise TypeError("fname must be a binary file, buffer or path-like.")
 
 
 def _set_endianness(endianness: str) -> str: