remove()方法用于删除给定元素的第一次出现,该方法用此列表(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。
语法:
list_name.remove(element)
Parameter(s):
element –它表示要删除的元素。
返回值:
此方法的返回类型为<class'NoneType'>,它不返回任何内容。
范例1:
# 带有示例的Python列表remove()方法 # 宣布名单 cars = ["BMW", "Porsche", "Audi", "Lexus", "Audi"] # 打印清单 print("cars before remove operations...") print("cars: ", cars) # 删除“宝马”"BMW" cars.remove("BMW") # 删除“宝马”"Audi" cars.remove("Audi") # 打印清单 print("cars after remove operations...") print("cars: ", cars)
输出结果
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:
# 带有示例的Python列表remove()方法 # 宣布名单 x = [10, 20, 30, 40, 50, 60, 70] # 打印清单 print("x before remove operations...") print("x: ", x) x.remove(10) # 将删除10 x.remove(70) # 将删除70 # 打印清单 print("x after remove operations...") print("x: ", x) # 删除“宝马”an element that doesn't exist # 在列表中... x.remove(100) # 会产生错误
输出结果
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) # 会产生错误 ValueError: list.remove(x): x not in list