Add local_file example to align with TS SDK repo (#1514)

Author: seratch

examples/basic/local_file.py

@@ -0,0 +1,45 @@
+import asyncio
+import base64
+import os
+
+from agents import Agent, Runner
+
+FILEPATH = os.path.join(os.path.dirname(__file__), "media/partial_o3-and-o4-mini-system-card.pdf")
+
+
+def file_to_base64(file_path: str) -> str:
+    with open(file_path, "rb") as f:
+        return base64.b64encode(f.read()).decode("utf-8")
+
+
+async def main():
+    agent = Agent(
+        name="Assistant",
+        instructions="You are a helpful assistant.",
+    )
+
+    b64_file = file_to_base64(FILEPATH)
+    result = await Runner.run(
+        agent,
+        [
+            {
+                "role": "user",
+                "content": [
+                    {
+                        "type": "input_file",
+                        "file_data": f"data:application/pdf;base64,{b64_file}",
+                        "filename": "partial_o3-and-o4-mini-system-card.pdf",
+                    }
+                ],
+            },
+            {
+                "role": "user",
+                "content": "What is the first sentence of the introduction?",
+            },
+        ],
+    )
+    print(result.final_output)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())