【python基础】List列表中插入多个元素的几种实现方式

• 方法一：+号
• 方法二：insert函数
• 方法三：append方法添加
• 方法4:extend()

a = [1, 2, 3, 9, 10]
b = [4, 5, 6, 7, 8]
c = a[:3] + b + a[3:]
print(c)

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

fruit = ['pineapple','pear']
fruitlist = ['grape', 'uuu', 'ccc']
for x in fruitlist:
    fruit.insert(len(fruit),x) # len(fruit)表示根据fruit的长度动态插入
fruit

fruit = ['pineapple','pear']
fruitlist = ['grape', 'uuu', 'ccc']
for x in fruitlist:
    fruit.append(x)
fruit

extend()方法添加元素，extend() 和 append() 的不同之处在于：extend() 不会把列表或者元祖视为一个整体，而是把它们包含的元素逐个添加到列表中。

l = ['Python', 'C++', 'Java']
#追加元素
l.extend('C')
print(l)
#追加元组，元祖被拆分成多个元素
t = ('JavaScript', 'C#', 'Go')
l.extend(t)
print(l)
#追加列表，列表也被拆分成多个元素
l.extend(['Ruby', 'SQL'])
print(l)

[‘Python’, ‘C++’, ‘Java’, ‘C’]
[‘Python’, ‘C++’, ‘Java’, ‘C’, ‘JavaScript’, ‘C#’, ‘Go’]
[‘Python’, ‘C++’, ‘Java’, ‘C’, ‘JavaScript’, ‘C#’, ‘Go’, ‘Ruby’, ‘SQL’]