Python Set clear()用法及代码示例

设置 clear() 方法

clear() 方法用于清除/删除集合中的所有元素。

用法:

    set_name.clear()

参数：

• 它不接受任何参数。

返回值：

这个方法的返回类型是None。

例：

# Python Set clear() Method with Example

# declaring a set
cities = {"New Delhi", "Mumbai", "Indore", "Gwalior"}

# printing set before clearing the element
print("cities = ", cities)

# clearing all elements
cities.clear()

# printing set after clearing the element
print("cities = ", cities)

输出

cities =  {'Indore', 'Gwalior', 'New Delhi', 'Mumbai'}
cities =  set()