从列表python中删除所有元素

Question

我已经编写了这段代码，但它并没有从列表中删除所有元素，而是只删除了 3 个项目。请检查我做错了什么names = ["John","Marry","Scala","Micheal","Don"]if names: for name in names:  print(name)  print(f"Removing {name} from the list")  names.remove(name)print("The list is empty")

Answer 1

要实际就地清除列表，您可以使用以下任何一种方式：

alist.clear()  # Python 3.3+, most obvious

del alist[:]

alist[:] = []

alist *= 0     # fastest

并且您的代码的问题是名称必须是names[:] 因为当 for 循环遍历列表时它认为是一个索引号并且当您删除一些索引时您会更改它，因此它会跳过一些索引

Answer 2

names = ["John","Marry","Scala","Micheal","Don"]

if names:

 for name in names[:]:

  print(name)

  print(f"Removing {name} from the list")

  names.remove(name)

print("The list is empty")

只需在 for 循环中按名称 [:] 分配全名列表

John

Removing John from the list

Marry

Removing Marry from the list

Scala

Removing Scala from the list

Micheal

Removing Micheal from the list

Don

Removing Don from the list

The list is empty

Answer 3

只需使用names.clear()它就会清除整个列表