Python 列表的添加-append函数

列表的添加-append函数

功能

• 将一个元素添加到当前列表中

用法

• list.append(new_item)

参数

• new_item:添加进列表的新的元素(成员)

注意事项

• 被添加的元素只会被添加到末尾
• append函数是在原有列表的基础上添加,不需要额外添加新的变量

代码

# coding:utf-8

books = []
print(id(books))
books.append('python入门课程')
print(books)
print(id(books))

number = 1.1
tuple_test = (1, )
dict_test = {'name': 'dewei'}

books.append(number)
books.append(tuple_test)
books.append(dict_test)
books.append('diango')
books.append(1)

books.append('')
books.append(True)

print(books)
print(id(books))

book_1 = ['西游记', '红楼梦']
book_2 = ['三国演义', '水浒传']
print(id(book_1))
book_1 = book_1 + book_2  # id改变
book_1 += book_2  # id不变
print(book_1)
print(id(book_1))