GREEN, Blue]) for led,i in LEDs: print('led = ', LEDs[i]) # 22, 27, 17 """ Traceback (most recent call last): File "script.py", line 9, in for led,i in LEDs: TypeError: cannot unpack non-iterable int object Exited with error status 1 """ solution...
Note thatzipwith different size lists will stop after the shortest list runs out of items. You may want to look intoitertools.zip_longestif you need different behavior. Also note thatzipin Python 2 returns a list butzipin Python 3 returns a lazy iterable. In Python 2,itertools.izipis equi...
1)函数,数学定义 y=f(x) y是x的函数,x是自变量。 2)Python函数:Python函数是一种封装了特定任务的可重用代码块。通过将程序分解为更小、更具体的任务,函数提供了一种有效的方式来组织和管理代码,具有很大的灵活性和定制性,可以接受任意数量的参数,并可以有默认值。通过使用函数可以提高代码的可读性、可维护性...
Aloopis a sequence of instructions that is continually repeated until a certain condition is reached. For instance, we have a collection of items and we create a loop to go through all elements of the collection. Loops in Python can be created withfororwhilestatements. Python for statement Py...
Example 1: Print elements of the list with its index number using the enumerate() function In this program, the for loop iterates through the list and displays the elements along with its index number. numbers = [4, 2, 5, 7, 8] for i, v in enumerate(numbers): print('Numbers[',...
Automate the Boring Stuff with Python Programming 彭彭老師所製作的迴圈教學 如果要更巧妙的運用for迴圈,需要增加的知識是: 知道可迭代的資料有哪些,就是在in後面呈現的資料範圍。 迭代後要執行的程式內容,跑迴圈時你希望Python幫你做的事。 控制迴圈的工具:break與continue陳述句。
python loop的用法和例句 目录 1、if语句 2、if嵌套使用 3、for语句 4、列表的操作 4.1 append和extend 4.2 insert() 4.3 remove() 4.4 count() 4.5 list.index() 5、while语句 6、分支和函数 1、if语句 #if条件判断学习 people =20 cats = 30...
Print all items, using a while loop to go through all the index numbers thislist = ["apple", "banana", "cherry"]i = 0 while i < len(thislist): print(thislist[i]) i = i + 1 Try it Yourself » Learn more about while loops in our Python While Loops Chapter.Looping...
efficient solution. In this tutorial, we covered the for loop and while loop with the different combinations and an example to demonstrate the functionalities of looping. All in all, this tutorial, covers everything that you need to know in order to understand and use the looping in Python. ...
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