# listの使い方
li_1d = [1,2,3,4]                  # ベクトルっぽく
li_2d = [ [1,2,3] , [4,5,6] , [7,8,9] ] #行列っぽく

# 取り出し方
li_1d[1]     # 2
li_2d[1][2]  # 6

# 演算は期待できない
li_1d + li_1d  # [1, 2, 3, 4, 1, 2, 3, 4]
li_2d + li_2d  # [[1, 2, 3], [4, 5, 6], [7, 8, 9], [1, 2, 3], [4, 5, 6], [7, 8, 9]]

# max() , min() ,sum() , len() はよく使う
max(li_1d)    # 4
min(li_1d)    # 1
sum(li_1d)    # 10
len(li_1d)    # 4

# for文のシーケンスとしてよく使う
li_str = ["a","b","c"]
for s in li_str:
    print(s)
# a
# b
# c