Python List extend() 方法
Python 的列表扩展() 方法迭代字符串、列表、元组等可迭代对象,并将可迭代对象的每个元素添加到 List 的末尾。列表的长度随着迭代中存在的元素数量而增加。
Syntax: list.extend(iterable)
Parameters:
- iterable: Any iterable (list, set, tuple, etc.)
Returns:
The extend() method modifies the original list. It doesn’t return any value.
示例 1:使用extend() 方法
Python
# my_list
my_list = ['geeks', 'for']
# Another list
another_list = [6, 0, 4, 1]
# Using extend() method
my_list.extend(another_list)
print my_list
Python
# My List
my_list = ['geeks', 'for', 'geeks']
# My Tuple
my_tuple = ('DSA', 'Java')
# My Set
my_set = {'Flutter', 'Android'}
# Append tuple to the list
my_list.extend(my_tuple)
print(my_list)
# Append set to the list
my_list.extend(my_set)
print(my_list)
Python
# My list
my_list = ['geeks', 'for', 6, 0, 4, 1]
# My string
my_list.extend('geeks')
print my_list
输出:
['geeks', 'for', 6, 0, 4, 1]
示例 2:添加元组元素并设置为列表
Python
# My List
my_list = ['geeks', 'for', 'geeks']
# My Tuple
my_tuple = ('DSA', 'Java')
# My Set
my_set = {'Flutter', 'Android'}
# Append tuple to the list
my_list.extend(my_tuple)
print(my_list)
# Append set to the list
my_list.extend(my_set)
print(my_list)
输出:
['geeks', 'for', 'geeks', 'DSA', 'Java']
['geeks', 'for', 'geeks', 'DSA', 'Java', 'Android', 'Flutter']
示例 3:将字符串扩展到列表
字符串是可迭代的,因此如果您使用字符串扩展列表,您将在迭代字符串附加每个字符。
Python
# My list
my_list = ['geeks', 'for', 6, 0, 4, 1]
# My string
my_list.extend('geeks')
print my_list
输出:
['geeks', 'for', 6, 0, 4, 1, 'g', 'e', 'e', 'k', 's']