Headers = {'content-disposition': 'inline; filename="out.pdf"'} in Python fastapi file not opening in browser

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Python

I have the following code in Python:

l_statement = "select srno,attachment from dbo.attachments where srno = 1"
   print(l_statement)
   sqlcursor.execute(l_statement)
   for row in sqlcursor.fetchall():
       print(type(row[1]))
       print(row[1])

       headers = {'Content-Disposition': 'inline; filename="out.pdf"'}
       #headers = {'Content-Disposition': 'attachment; filename="out.pdf"'}
       return Response(row[1], headers=headers, media_type='application/pdf')

When I run this program from FastAPI, I get the correct result for attachment. It gives me an option to Download file and I can download PDF file.

However, for inline option, it gives a message as:

Unrecognized response type; displaying content as text.

And shows as response in Response Body instead of opening PDF file in Browser:

%PDF-1.3
1 0 obj
<<
/Count 1
/Kids [3 0 R]
/MediaBox [0 0 595.28 841.89]
/Type /Pages
>>
endobj
2 0 obj
<<
/OpenAction [3 0 R /FitH null]
/PageLayout /OneColumn
/Pages 1 0 R
/Type /Catalog
>>
endobj
3 0 obj
<<
/Contents 4 0 R
/Parent 1 0 R
/Resources 6 0 R
/Type /Page
>>
endobj
4 0 obj
<<
/Filter /FlateDecode
/Length 74
>>
stream
x�3R��2�35W(�r
Q�w3T04�30PISp

	�Z(����)��(hx����+���(j*�d��
#M
endstream
endobj
5 0 obj
<<
/BaseFont /Helvetica-Bold
/Encoding /WinAnsiEncoding
/Subtype /Type1
/Type /Font
>>
endobj
6 0 obj
<<
/Font <>
/ProcSet [/PDF /Text /ImageB /ImageC /ImageI]
>>
endobj
7 0 obj
<<
/CreationDate (D:20230929150353Z15'03')
>>
endobj
xref
0 8
0000000000 65535 f 
0000000009 00000 n 
0000000096 00000 n 
0000000199 00000 n 
0000000279 00000 n 
0000000424 00000 n 
0000000526 00000 n 
0000000613 00000 n 
trailer
<<
/Size 8
/Root 2 0 R
/Info 7 0 R
/ID [<4527CC16A77C85F8369BA38DDA715212><4527CC16A77C85F8369BA38DDA715212>]
>>
startxref
674
%%EOF

What I have tried:

I have tried to create a PDF file in Python in memory and try to open in browser with Content-Disposition with Inline and attachment option.

It works for attachment but it does not work for inline.