Python set clear()用法及代码示例

clear()方法从集合中删除所有元素。

用法:

set.clear()
parameters:
The clear() method doesn't take any parameters.
返回：
The clear() method doesn't return any value.

# set of letters 
GEEK = {'g', 'e', 'e', 'k', 's'} 
print('GEEK before clear:', GEEK) 
  
# clearing vowels 
GEEK.clear() 
print('GEEK after clear:', GEEK)

输出：

GEEK before clear:set(['s', 'e', 'k', 'g'])
GEEK after clear:set([])

应用：

It is used to clear set.

# set of letters 
GEEK = {6, 0, 4, 1} 
print('GEEK before clear:', GEEK) 
  
# clearing vowels 
GEEK.clear() 
print('GEEK after clear:', GEEK) 

输出：

GEEK before clear:set([0, 1, 4, 6])
GEEK after clear:set([])