How to extract the delimiter in large csv file from s3 through pandas

Question

How to extract the delimiter in large csv file from s3 through python pandas.

Input data -

id|name|age|address

Output result -

|

Code tried:

from detect_delimiter import detect

s3 = session.client('s3')
file = s3.get_object(Bucket="test", Key="input/csvfolder/test_123456789.csv")
csv_string = file["Body"].read()
df = pd.read_csv(io.BytesIO(csv_string),sep=",",encoding="cp1252",chunksize=1)
print(detect(df))

Error :

AttributeError: 'TextFileReader' object has no attribute 'splitlines'