hamaguchi-amago

# -*- coding: utf-8 -*-

list1 = [1]
list2 = [2, 3]
list3 = [4, 5, 6]
list4 = list1 + list2 + list3

print("list1:" + str(list1))
print("list2:" + str(list2))
print("list3:" + str(list3))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [2, 4, 8]
print("insert前:" + str(list))
list.insert(2, 6)
print("insert後:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [2, 4, 6, 8]
print("削除前:" + str(list))
del list[1]
print("削除後:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [2, 4, 6, 8, 6, 4]
print("削除前:" + str(list))
list.remove(4)
print("削除後:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [2, 4, 6, 8, 6, 4]
print("list内容:" + str(list))
print("listの要素数:" + str(len(list)))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [5, 2, 3, 4, 1]
print("ソート前:" + str(list))
list.sort()
print("ソート後:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [5, 2, 3, 4, 1]
print("ソート前:" + str(list))
list.sort(reverse=True)
print("ソート後:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [5, 2, 3, 4, 1]
print("並び替え前:" + str(list))
list.reverse()
print("並び替え後:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-

list = [5, 2, 3, 4, 1]
print("ソート前:" + str(list))
list.sort()
print("ソート後:" + str(list))
list.reverse()
print("逆順に並び替え:" + str(list))

hamaguchi-amago

# -*- coding: utf-8 -*-
from operator import itemgetter

list = [[300, 40, 9], [100, 60, 8], [200, 50, 7]]
print("ソート前:" + str(list))

list.sort(key=itemgetter(0))
print("ソート後(0番目の要素):" + str(list))

list.sort(key=itemgetter(1))