Python next() 函数

实例

创建一个迭代器，并逐一打印项目：

mylist = iter(["apple", "banana", "cherry"])
x = next(mylist)
print(x)
x = next(mylist)
print(x)
x = next(mylist)
print(x)

定义和用法

next() 函数返回迭代器中的下一项。

您可以添加默认的返回值，以在迭代结束时返回。

语法

next(iterable, default)

参数值

更多实例

当迭代结束时返回一个默认值：

mylist = iter(["apple", "banana", "cherry"])
x = next(mylist, "orange")
print(x)
x = next(mylist, "orange")
print(x)
x = next(mylist, "orange")
print(x)
x = next(mylist, "orange")
print(x)