add python example

examples/python/log_file/README.md

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+<!--[metadata]
+title = "Log file example"
+-->
+
+Demonstrates how to log any file from the SDK using the [`DataLoader`](https://www.rerun.io/docs/howto/open-any-file) machinery.
+
+Usage:
+```bash
+python examples/python/log_file/main.py examples/assets
+```
+

examples/python/log_file/main.py

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+#!/usr/bin/env python3
+"""
+Demonstrates how to log any file from the SDK using the `DataLoader` machinery.
+
+See <https://www.rerun.io/docs/howto/open-any-file> for more information.
+
+Usage:
+```
+python examples/python/log_file/main.py -- examples/assets
+```
+"""
+from __future__ import annotations
+
+import argparse
+from pathlib import Path
+
+import rerun as rr  # pip install rerun-sdk
+
+parser = argparse.ArgumentParser(
+    description="Demonstrates how to log any file from the SDK using the `DataLoader` machinery."
+)
+rr.script_add_args(parser)
+parser.add_argument(
+    "--from-contents",
+    action="store_true",
+    default=False,
+    help="Log the contents of the file directly (files only -- not supported by external loaders).",
+)
+parser.add_argument("filepaths", nargs="+", type=Path, help="The filepaths to be loaded and logged.")
+args = parser.parse_args()
+
+rr.script_setup(args, "rerun_example_log_file")
+
+for filepath in args.filepaths:
+    if not args.from_contents:
+        # Either log the file using its path…
+        rr.log_file_from_path(filepath)
+    else:
+        # …or using its contents if you already have them loaded for some reason.
+        try:
+            with open(filepath, "rb") as file:
+                rr.log_file_from_contents(filepath, file.read())
+        except Exception:
+            pass
+
+rr.script_teardown(args)

examples/python/log_file/requirements.txt

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+numpy
+rerun-sdk