Python 学习之元组列表

a_tuple = (12,3,5,15,6)
another_tuple = 12,3,5,15,6

print(a_tuple)
print(another_tuple)

"""
(12, 3, 5, 15, 6)
(12, 3, 5, 15, 6)
"""

a_list=[12,3,5,15,6]

print(a_list)

"""
[12, 3, 5, 15, 6]
"""

a_list=[12,3,5,15,6]
a_list.append(0) #在 a_list 后追加一个 0
print(a_list)

"""
[12, 3, 5, 15, 6, 0]
"""

a_list=[12,3,5,15,6]
a_list.insert(1,0) # 在位置1处添加0
print(a_list)
"""
[12, 0, 3, 5, 15, 6, 0]
"""

a_list=[12,3,5,15,6]
a_list.remove(3) # 删除列表中第一个出现的值为 3 的项
print(a_list)
"""
[12, 5, 15, 6]
"""

a_list=[12,3,5,15,6,4,7]
print(a_list[0])  # 显示列表a_list的第0位的值
# 12

print(a_list[-1]) # 显示列表a_list的最末位的值
# 7

print(a_list[0:3]) # 显示列表a_list的从第0位 到 第2位(第3位之前) 的所有项的值
# [12, 3, 5]

print(a_list[5:])  # 显示列表a_list的第5位及以后的所有项的值
# [4, 7]

print(a_list[-3:]) # 显示列表a_list的倒数第3位及以后的所有项的值
# [6, 4, 7]

a_list=[12,3,5,15,6,4,7]
print(a_list.index(3)) # 显示列表a_list中第一次出现的值为3的项的索引
# 1

a_list=[12,3,5,15,6,4,7,6,6,6]
print(a_list.count(6)) # 统计列表a_list中6出现的次数
# 4

_list=[12,3,5,15,6,4,7,6,6,6]
a_list.sort() # 默认从小到大排序
print(a_list)
# [3, 4, 5, 6, 6, 6, 6, 7, 12, 15]

a_list.sort(reverse=True) # 从大到小排序
print(a_list)
# [15, 12, 7, 6, 6, 6, 6, 5, 4, 3]

for list_item in a_list:
   print(list_item)

"""
12
3
5
15
6
"""

for index in range(len(a_list)):
   print("index = ", index, ", number in list = ", a_list[index])
"""
index =  0 , number in list =  12
index =  1 , number in list =  3
index =  2 , number in list =  5
index =  3 , number in list =  15
index =  4 , number in list =  6
"""

for index in range(len(a_tuple)):
   print("index = ", index, ", number in tuple = ", a_tuple[index])
"""
index =  0 , number in tuple =  12
index =  1 , number in tuple =  3
index =  2 , number in tuple =  5
index =  3 , number in tuple =  15
index =  4 , number in tuple =  6
"""