下面是一个for循环中使用enumerate函数的状态图,展示了循环的过程。 StartEnumerateForLoopCheckConditionFetchElementOutputIndex 关系图 在理解enumerate()的过程中,我们可以借助关系图来表示其和for循环结构之间的关系。 FORLOOPstringelementintindexENUMERATEintstartuses 小结 在Python中,for in循环是处理可迭代对象的一种...
#!/usr/bin/python3 Blue = 17 GREEN = 27 RED = 22 LEDs = list([RED, GREEN, Blue]) # enumerate ✅ for index, led in enumerate(LEDs): print('led = ', LEDs[index]) # 22, 27, 17 # 等价于,start default 0 for index, led in enumerate(LEDs, start=0): print('led = ', LE...
class Solution(object): def circularArrayLoop(self, nums): """ :type nums: List[int] :rtype: bool """ if len(nums) <= 1: return False flag = False for start in range(len(nums)): route = [] indexs = [] while len(route) <= len(nums) + 1: indexs.append(start) if nums...
for循环通常用于从定义循环边界的变量列表中访问成员变量的索引:for index in range(len(tips)):print(...
Python "for" Loops: The Pythonic Way In this quiz, you'll test your understanding of Python's for loop. You'll revisit how to iterate over items in a data collection, how to use range() for a predefined number of iterations, and how to use enumerate() for index-based iteration. Ge...
forindexinrange(n):statement 其中，index 被称为循环计数器（loop counter），n 是循环执行的次数。
/usr/bin/python# -*- coding: UTF-8 -*-fruits=['banana','apple','mango']forindexinrange(len(fruits)):print('当前水果 : %s'%fruits[index])print("Good bye!") 以上实例输出结果: 当前水果:banana当前水果:apple当前水果:mangoGoodbye!
Review: Python’s for loop Python 中的 for 循环不是传统的 for 循环。为了解释我的意思,我们来看一下其他语言的 for 循环是怎么写的。...没有索引初始化、边界检查和索引增加。Python 的 for 循环都把这些工作为我们做了。 所以在 Python 中确实有 for 循环,但不是传统的 C 风格的 for 循环。...Pyth...
This first creates a range corresponding to the indexes in our list (0tolen(colors) - 1). We can loop over this range using Python’s for-in loop (really aforeach). This provides us with the index of each item in ourcolorslist, which is the same way that C-styleforloops work. ...
A for loop is a programming construct that allows a block of code to be executed repeatedly until a certain condition is met.