prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Single int indexes param in sample method
  According to docs the `indexes` param in the `sample` method can be a "list of ints or a single int".
  
  However passing a single int raises this exception: `IndexError: too many indices for array`.
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `rasterio/sample.py`
  Content:
  ```
  1 # Workaround for issue #378. A pure Python generator.
  2 
  3 def sample_gen(dataset, xy, indexes=None):
  4     index = dataset.index
  5     read = dataset.read
  6     for x, y in xy:
  7         r, c = index(x, y)
  8         window = ((r, r+1), (c, c+1))
  9         data = read(indexes, window=window, masked=False, boundless=True)
  10         yield data[:,0,0]
  11
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/rasterio/sample.py b/rasterio/sample.py
  --- a/rasterio/sample.py
  +++ b/rasterio/sample.py
  @@ -3,6 +3,10 @@
   def sample_gen(dataset, xy, indexes=None):
       index = dataset.index
       read = dataset.read
  +
  +    if isinstance(indexes, int):
  +        indexes = [indexes]
  +
       for x, y in xy:
           r, c = index(x, y)
           window = ((r, r+1), (c, c+1))
  
verification_info: {"golden_diff": "diff --git a/rasterio/sample.py b/rasterio/sample.py\n--- a/rasterio/sample.py\n+++ b/rasterio/sample.py\n@@ -3,6 +3,10 @@\n def sample_gen(dataset, xy, indexes=None):\n     index = dataset.index\n     read = dataset.read\n+\n+    if isinstance(indexes, int):\n+        indexes = [indexes]\n+\n     for x, y in xy:\n         r, c = index(x, y)\n         window = ((r, r+1), (c, c+1))\n", "issue": "Single int indexes param in sample method\nAccording to docs the `indexes` param in the `sample` method can be a \"list of ints or a single int\".\n\nHowever passing a single int raises this exception: `IndexError: too many indices for array`.\n\n", "before_files": [{"content": "# Workaround for issue #378. A pure Python generator.\n\ndef sample_gen(dataset, xy, indexes=None):\n    index = dataset.index\n    read = dataset.read\n    for x, y in xy:\n        r, c = index(x, y)\n        window = ((r, r+1), (c, c+1))\n        data = read(indexes, window=window, masked=False, boundless=True)\n        yield data[:,0,0]\n", "path": "rasterio/sample.py"}], "after_files": [{"content": "# Workaround for issue #378. A pure Python generator.\n\ndef sample_gen(dataset, xy, indexes=None):\n    index = dataset.index\n    read = dataset.read\n\n    if isinstance(indexes, int):\n        indexes = [indexes]\n\n    for x, y in xy:\n        r, c = index(x, y)\n        window = ((r, r+1), (c, c+1))\n        data = read(indexes, window=window, masked=False, boundless=True)\n        yield data[:,0,0]\n", "path": "rasterio/sample.py"}]}