csv.reader で読み込み、各行を読み込んで判定する。
例
import csv
with open('data.csv', 'r') as csv_file:
reader = csv.reader(csv_file)
for row in reader:
if row[2] == '売り':
print(row[0] + ' ' + row[1] + ' ' + row[3])
data.csv
"2021/01/10 02:34:10","JPY","買い","1,713.12"
"2022/03/08 12:20:32","USD","売り","9876"
"2022/12/31 18:07:55","EUR","買い","1,234,888.9"
結果
2022/03/08 12:20:32 USD 9876