マンガでわかるPython

# 3p __1__ 猫野： 次は ＣＳＶファイルを 書き込んでみよう １行ずつ 書き込む方法と まとめて 書き込む方法を 示す __2__ main.py　１行ずつ ```py import csv p = 'sample.csv' # CWDのsample.csv with open(p, 'w', encoding='utf-8') as f: writer = csv.writer(f, lineterminator='\n') writer.writerow([10, 20, 30]) writer.writerow(['rat', 'cat', 'dog']) ``` --- __3__ main.py　まとめて ```py import csv p = 'sample.csv' # CWDのsample.csv l = [[10, 20, 30], ['rat', 'cat', 'dog']] with open(p, 'w', encoding='utf-8') as f: writer = csv.writer(f, lineterminator='\n') writer.writerows(l) ``` rowsとsが付く --- __4__ 出力 sample.csv ```csv 10,20,30 rat,cat,dog ```