save project

666.csv

 1,2,3
+4,5,6
+7,8,9
+1,2,3
+4,5,6
+7,8,9
+1,2,3
+4,5,6
+7,8,9

my_csv.py

 import csv
-a=[1,2,3]
-b=[4,5,6]
+a=[[1,2,3],
+[4,5,6],
+[7,8,9]]
 
-with open("666.csv","w",encoding="utf=8")as file:
+with open("666.csv","w",encoding="utf=8",newline="")as file:
     f=csv.writer(file)
-    f.writerow(a)
-    f.writerow(b)
\ No newline at end of file
+    for i in range(len(a)):
+        f.writerows(a)
+
+with open("666.csv","r",encoding="utf=8",newline="")as file:
+    f=csv.reader(file)
+    data=list(f)
+    print(data[0][0])
\ No newline at end of file