In this Python tutorial, you will understandPython for loop with index. I use the for loop with index while iterating over the iterable object to reverse the item of the iterable object. But you can’t access that index using the Python for loop only; you will need to tweak the for lo...
python for loop with index #!/usr/bin/python3 Blue = 17 GREEN = 27 RED = 22 LEDs = list([RED, GREEN, Blue]) 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...
If you’re moving to Python from C or Java, you might be confused by Python’sforloops.Python doesn’t actually have for loops… at least not the same kind offorloop that C-based languages have. Python’sforloops are actuallyforeach loops. In this article I’ll compare Python’sforloo...
for loop in one line Accessing the index in for loop Iterate String using for loop Iterate List using for loop Iterate Dictionary using for loop What is for loop in Python In Python, the for loop is used to iterate over a sequence such as a list, string, tuple, other iterable objects ...
1.for-loop和列表 在开始使用 for 循环之前,你需要在某个位置存放循环的结果。最好的方法是使用列表(list),顾名思义,它就是一个按顺序存放东西的容器。如 何创建列表: hairs = [‘brown’, ‘blond’, ‘red’] eyes = [‘brown’, ‘blue’, ‘green’] ...
Find out how to access the index in a for loop in Python. 1) Useenumerate()¶ This can be done with theenumeratefunction: my_list=["apple","banana","cherry"]forindex,iteminenumerate(my_list):print(index,item) 0 apple 1 banana 2 cherry ...
Loop Through the Index NumbersYou can also loop through the list items by referring to their index number.Use the range() and len() functions to create a suitable iterable.Example Print all items by referring to their index number: thislist = ["apple", "banana", "cherry"]for i in ...
statement # for loop body 列表必须是有限的，否则你会创建一个无限循环，这很少是你所需要的。另一...
LoopsSometimes, you need to perform code on each item in a list. This is called iteration, and it can be accomplished with a while loop and a counter variable.For example: words = ["hello", "world", "spam", "eggs"]
In Python, you can have an else block with a for loop, which is executed when the loop is finished. for i in range(3): print(i) else: print("Done") Iterating with index To iterate through a sequence along with the index, you can use the enumerate() function. ...