在Python中,字典(dictionary)是一种无序的数据结构,其中包含键(key)和对应的值(value)。当需要对字典中的键值对进行遍历时,通常会使用for循环来实现。在本文中,我们将探讨如何使用for循环倒序输出字典中的键值对。 字典(Dictionary)概述 字典是Python中一种非常重要的数据结构,它使用花括号{}表示,其中每个元素包含一...
2.You can also use aforloop on a dictionary to loop through itskeyswith the following:可以使用for循环通过key值去遍历一个字典 webster ={"Aardvark":"A star of a popular children's cartoon show.","Baa":"The sound a goat makes.","Carpet":"Goes on the floor.","Dab":"A small amount....
您可以使用for循环遍历字典。 遍历字典时,返回值是字典的键,但也有返回值的方法。 实例 一一打印字典中的所有键名: forxinthisdict: print(x) 亲自试一试 » 实例 一一打印字典中的所有值: forxinthisdict: print(thisdict[x]) 亲自试一试 »
(either by the loop or by another thread) are not violated. Add methods to dictionaries that return different kinds of iterators explicitly: 1 2 3 4 5 forkeyindict.iterkeys(): ... forvalueindict.itervalues(): ... forkey,valueindict.iteritems(): ... This means thatfor x in dictis s...
as long as the restriction on modifications to the dictionary (either by the loop or by another thread) are not violated. Add methods to dictionaries that return different kinds of iterators explicitly: for key in dict.iterkeys(): ... for value in dict.itervalues(): ... for key, value ...
If you need to iterate through a dictionary to inspect all of its keys or values, there are a few different ways to do it. The most common is to use a for loop on the dictionary—e.g., for item in the_dict. This yields up the keys in the dictionary, which can then be used to...
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 such as range. With the help of for loop, we can iterate over each item present in the sequence and executes...
For more information onrange(), see the Real Python articlePython’srange()Function (Guide). Remove ads AlteringforLoop Behavior You saw in the previous tutorial in this introductory series how execution of awhileloop can be interrupted withbreakandcontinuestatementsand modified with anelseclause. ...
Alice Bob Charlie Diana Ethan Fiona George Hannah >>> for student in students.keys(): ... print(student) ... Alice Bob Charlie Diana Ethan Fiona George Hannah In these examples, you first iterate over the keys of a dictionary using the dictionary directly in the loop header. In the ...
在Python 文档中找到 dictionary (又被称作 dicts, dict)的相关的内容,学着对 dict 做更多的操作。 找出一些 dict 无法做到的事情。例如比较重要的一个就是 dict 的内容是无序的,你可以检查一下看看是否真是这样。 试着把for-loop执行到 dict 上面,然后试着在 for-loop 中使用 dict 的items()函数,看看会有...