Python List remove()用法及代码示例

列出 remove() 方法

remove() 方法用于删除给定元素的第一次出现，该方法使用此列表(我们必须从中删除元素的列表)调用，并接受要删除的元素作为参数。

用法:

    list_name.remove(element)

参数：

• element– 它代表要删除的元素。

返回值：

这个方法的返回类型是<class 'NoneType'>，它什么都不返回。

范例1：

# Python List remove() Method with Example

# declaring the list
cars = ["BMW", "Porsche", "Audi", "Lexus", "Audi"]

# printing the list
print("cars before remove operations...")
print("cars:", cars)

# removing "BMW"
cars.remove("BMW")
# removing "Audi"
cars.remove("Audi")

# printing the list 
print("cars after remove operations...")
print("cars:", cars)

输出

cars before remove operations...
cars: ['BMW', 'Porsche', 'Audi', 'Lexus', 'Audi']
cars after remove operations...
cars: ['Porsche', 'Lexus', 'Audi']

注意：如果列表中不存在任何元素，则方法返回 "ValueError"。

范例2：

# Python List remove() Method with Example

# declaring the list
x = [10, 20, 30, 40, 50, 60, 70]

# printing the list
print("x before remove operations...")
print("x:", x)

x.remove(10)   # will remove 10
x.remove(70)   # will remove 70

# printing the list
print("x after remove operations...")
print("x:", x)

# removing an element that doesn't exist
# in the list...
x.remove(100) # will generate error

输出

x before remove operations...
x: [10, 20, 30, 40, 50, 60, 70]
x after remove operations...
x: [20, 30, 40, 50, 60]
Traceback (most recent call last):
  File "main.py", line 19, in <module>
    x.remove(100) # will generate error
ValueError:list.remove(x):x not in list