Python next() 函数
Python基础 2022-06-06 14:35:05小码哥的IT人生shichen
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)
完整实例：
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
| 参数 | 描述 |
|---|---|
| iterable | 必需。可迭代对象。 |
| default | 可选。在迭代结束时返回的默认值。 |
更多实例
示例代码：
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)
完整实例：
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)