Python set add()用法及代碼示例

如果集合中不存在給定元素，則該集合add()方法會將其添加到集合中。

用法:

set.add(elem)
The add() method doesn't add an element to the
set if it's already present in it otherwise it 
will get added to the set.
參數：
add() takes single parameter(elem) which needs to 
be added in the set.
返回：
The add() method doesn't return any value.

# set of letters 
GEEK = {'g', 'e', 'k'} 
  
# adding 's' 
GEEK.add('s') 
print('Letters are:', GEEK) 
  
# adding 's' again 
GEEK.add('s') 
print('Letters are:', GEEK)

輸出：

('Letters are:', set(['k', 'e', 's', 'g']))
('Letters are:', set(['k', 'e', 's', 'g'])

應用：

It is used to add a new element to the set. 

# set of letters 
GEEK = {6, 0, 4} 
  
# adding 1 
GEEK.add(1) 
print('Letters are:', GEEK) 
  
# adding 0  
GEEK.add(0) 
print('Letters are:', GEEK)

輸出：

('Letters are:', set([0, 1, 4, 6]))
('Letters are:', set([0, 1, 4, 6]))

將元組添加到集合中：

# Python code to demonstrate addition of tuple to a set. 
s = {'g', 'e', 'e', 'k', 's'} 
t = ('f', 'o') 
  
# adding tuple t to set s. 
s.add(t) 
  
print(s)

輸出：

{'k', 's', 'e', 'g', ('f', 'o')}