feat: exception handling about file_count params of File component (#…

…8529)

* feat: exception handling about file_count params of File component

* lint

* add changeset

---------

Co-authored-by: zedd.ai <zedd.ai@kakaomobility.com>
Co-authored-by: freddyaboulton <alfonsoboulton@gmail.com>
Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>

.changeset/tangy-moose-check.md

@@ -0,0 +1,5 @@
+---
+"gradio": minor
+---
+
+feat:feat: exception handling about file_count params of File component

gradio/components/file.py

@@ -69,8 +69,14 @@ def __init__(
             render: If False, component will not render be rendered in the Blocks context. Should be used if the intention is to assign event listeners now but render the component later.
             key: if assigned, will be used to assume identity across a re-render. Components that have the same key across a re-render will have their value preserved.
         """
+        file_count_valid_types = ["single", "multiple", "directory"]
         self.file_count = file_count
-        if self.file_count in ["multiple", "directory"]:
+
+        if self.file_count not in file_count_valid_types:
+            raise ValueError(
+                f"Parameter file_count must be one of them: {file_count_valid_types}"
+            )
+        elif self.file_count in ["multiple", "directory"]:
             self.data_model = ListFiles
         else:
             self.data_model = FileData