python - DataError: unterminated CSV quoted field -

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i'm trying import huge (~2 gb) csv file postgres. below query wrote (in python) this:

q= ("copy {db} '{d}\\{file}' (format csv, null 'null', header)  ;").format(d = directory, db = db_name, file =fname)

now somewhere on line 17632150there integer field starts quotation, not closed:

 "2195961,12855,628,no

i wonder options @ point? constraint should possible psycopg2.


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