1 files changed, 27 insertions, 25 deletions
diff --git a/Lib/compression/zstd/__init__.py b/Lib/compression/zstd/__init__.py
index e7b2f427164..84b25914b0a 100644
--- a/Lib/compression/zstd/__init__.py
+++ b/Lib/compression/zstd/__init__.py
@@ -2,28 +2,28 @@
 
 __all__ = (
     # compression.zstd
-    "COMPRESSION_LEVEL_DEFAULT",
-    "compress",
-    "CompressionParameter",
-    "decompress",
-    "DecompressionParameter",
-    "finalize_dict",
-    "get_frame_info",
-    "Strategy",
-    "train_dict",
+    'COMPRESSION_LEVEL_DEFAULT',
+    'compress',
+    'CompressionParameter',
+    'decompress',
+    'DecompressionParameter',
+    'finalize_dict',
+    'get_frame_info',
+    'Strategy',
+    'train_dict',
 
     # compression.zstd._zstdfile
-    "open",
-    "ZstdFile",
+    'open',
+    'ZstdFile',
 
     # _zstd
-    "get_frame_size",
-    "zstd_version",
-    "zstd_version_info",
-    "ZstdCompressor",
-    "ZstdDecompressor",
-    "ZstdDict",
-    "ZstdError",
+    'get_frame_size',
+    'zstd_version',
+    'zstd_version_info',
+    'ZstdCompressor',
+    'ZstdDecompressor',
+    'ZstdDict',
+    'ZstdError',
 )
 
 import _zstd
@@ -43,6 +43,7 @@ COMPRESSION_LEVEL_DEFAULT = _zstd.ZSTD_CLEVEL_DEFAULT
 
 class FrameInfo:
     """Information about a Zstandard frame."""
+
     __slots__ = 'decompressed_size', 'dictionary_id'
 
     def __init__(self, decompressed_size, dictionary_id):
@@ -125,13 +126,13 @@ def finalize_dict(zstd_dict, /, samples, dict_size, level):
     chunks = b''.join(samples)
     chunk_sizes = tuple(_nbytes(sample) for sample in samples)
     if not chunks:
-        raise ValueError("The samples are empty content, can't finalize the"
+        raise ValueError("The samples are empty content, can't finalize the "
                          "dictionary.")
-    dict_content = _zstd.finalize_dict(zstd_dict.dict_content,
-                                        chunks, chunk_sizes,
-                                        dict_size, level)
+    dict_content = _zstd.finalize_dict(zstd_dict.dict_content, chunks,
+                                       chunk_sizes, dict_size, level)
     return ZstdDict(dict_content)
 
+
 def compress(data, level=None, options=None, zstd_dict=None):
     """Return Zstandard compressed *data* as bytes.
 
@@ -147,6 +148,7 @@ def compress(data, level=None, options=None, zstd_dict=None):
     comp = ZstdCompressor(level=level, options=options, zstd_dict=zstd_dict)
     return comp.compress(data, mode=ZstdCompressor.FLUSH_FRAME)
 
+
 def decompress(data, zstd_dict=None, options=None):
     """Decompress one or more frames of Zstandard compressed *data*.
 
@@ -162,12 +164,12 @@ def decompress(data, zstd_dict=None, options=None):
         decomp = ZstdDecompressor(options=options, zstd_dict=zstd_dict)
         results.append(decomp.decompress(data))
         if not decomp.eof:
-            raise ZstdError("Compressed data ended before the "
-                            "end-of-stream marker was reached")
+            raise ZstdError('Compressed data ended before the '
+                            'end-of-stream marker was reached')
         data = decomp.unused_data
         if not data:
             break
-    return b"".join(results)
+    return b''.join(results)
 
 
 class CompressionParameter(enum.IntEnum):