csv.Sniffer未检测到转义字符

如何解决csv.Sniffer未检测到转义字符

我有多个csv文件，我想自动检测它们的定界符，引号字符，转义字符等。我文件的字符。例如，我有一个带双引号的文件，并用反斜杠转义，Sniffer返回None作为转义符而不是反斜杠。

import csv
from itertools import islice

csvfile = 'sample_file.csv'

with open(csvfile,"r") as f:
    
    # read first 200 rows
    data = "".join(list(islice(f,200)))
    
    sniffer = csv.Sniffer()
    
    # read file and get info
    dialect = sniffer.sniff(data)
    print("delimiter: ",dialect.delimiter)
    print("escapechar: ",dialect.escapechar)
    print("quoting: ",dialect.quoting)
    print("doublequote: ",dialect.doublequote)
    print("quotechar: ",dialect.quotechar)

输出：

delimiter:,escapechar:  None
quoting:  0
doublequote:  True
quotechar:  "

我的文件看起来像这样：

"ID","Name","City"
"123","Abby","Martha\"s Vineyard"
"456","Brenda","Ike\"s Point"