[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

src/flask/__init__.py

@@ -24,8 +24,8 @@ from .helpers import get_flashed_messages as get_flashed_messages
 from .helpers import get_template_attribute as get_template_attribute
 from .helpers import make_response as make_response
 from .helpers import safe_join as safe_join
-from .helpers import send_file as send_file
 from .helpers import send_chunked_file as send_chunked_file
+from .helpers import send_file as send_file
 from .helpers import send_from_directory as send_from_directory
 from .helpers import stream_with_context as stream_with_context
 from .helpers import url_for as url_for

src/flask/helpers.py

@@ -626,38 +626,40 @@ def send_file(
         )
     )
 
-def send_chunked_file(filepath:str , chunk_size: int = 8192):
+
-    """ If you serve binary files,
+def send_chunked_file(filepath: str, chunk_size: int = 8192):
+    """If you serve binary files,
     you should not iterate through lines since
     it basically contains only one line, which means you still load the
     whole file all at once into the RAM. The only proper
-    way to read largit checkout files is via chunks with 
+    way to read largit checkout files is via chunks with
     this function: read_file_chunks(path, chunk_size)
     send every chunks with stream_with_context function
     :param filepath: file exists there . If not
         provided, error occured.
     :param chunk_size: defult size is 8192
     """
-    name_splited = filepath.split('/')
+    name_splited = filepath.split("/")
     filename = name_splited[len(name_splited) - 1]
+
     def read_file_chunks(path, chunk_size):
-        with open(path, 'rb') as fd:
+        with open(path, "rb") as fd:
             while 1:
                 buf = fd.read(chunk_size)
                 if buf:
                     yield buf
                 else:
                     break
+
     if os.path.isfile(filepath):
         return current_app.response_class(
             stream_with_context(read_file_chunks(filepath, chunk_size)),
-            headers={
+            headers={"Content-Disposition": f"attachment; filename={filename}"},
-                'Content-Disposition': f'attachment; filename={filename}'
-            }
         )
     else:
         raise NotFound()
 
+
 def safe_join(directory: str, *pathnames: str) -> str:
     """Safely join zero or more untrusted path components to a base
     directory to avoid escaping the base directory.