Python开发基础(习题卷3).pdf,试卷科目: Python开发基础(习题卷3) 第1部分:单项选择题,共137题,每题只有一个正确答案,多选或少选均不得分。 1.[单选题]ndarry属性shape返回类型是? A)tuple B)list C)dict D)其他都不是 答案:A 解析: 2.[单选题]执行下列程序后,输出结
1.In a new blank document, create a list called “shopping” and in there store three items of shopping.Items in a list can be integers, floats, strings, even another list. Lists can also be created with no items, shopping = [] will create a blank list but we will need to append ...
NumPy 最为核心的数据类型是ndarray,使用ndarray可以处理一维、二维和多维数组,该对象相当于是一个快速而灵活的大数据容器。NumPy 底层代码使用 C 语言编写,解决了 GIL 的限制,ndarray在存取数据的时候,数据与数据的地址都是连续的,这确保了可以进行高效率的批量操作,性能上远远优于 Python 中的list;另一方面ndarray对...
print 'I have', len(shoplist),'items to purchase.' print 'These items are:', # Notice the comma at end of the line for item in shoplist: print item, print '\nI also have to buy rice.' shoplist.append('rice') print 'My shopping list is now', shoplist print 'I will sort my l...
How to remove multiple items/elements from a list in Python? You can remove multiple items from a list in Python using many ways like,ifcontrol statements, list comprehension,enumerate(), list slicing, and for loop. In this article, I will explain how to remove multiple items from a list...
To learn more, see local.settings.file. requirements.txt: Contains the list of Python packages the system installs when it publishes to Azure. Dockerfile: (Optional) Used when publishing your project in a custom container.When you deploy your project to a function app in Azure, the entire ...
In Python, there is a built-in method called, len() that helps you get the number of items in a list. It can also be used for arrays, tuples, dictionaries, etc. The function takes a list as the argument and returns its length. List1 = [“Intellipaat”, “Python”, “Tutorial”...
Similarly, it’s appropriate to use a tuple rather than a list in the following situations: Immutable collections: When you have a fixed collection of items that shouldn’t change, such as coordinates (x, y, z), RGB color values, or other groupings of related values. Fixed size: When ...
If you’re in a scenario where performance is important, then it’s typically best toprofiledifferent approaches and listen to the data. Thetimeitlibrary is useful for timing how long it takes chunks of code to run. You can usetimeitto compare the runtime ofmap(),forloops, and list compr...
Python has two basic function for sorting lists:sortandsorted. Thesortsorts the list in place, while thesortedreturns a new sorted list from the items in iterable. Both functions have the same options:keyandreverse. Thekeytakes a function which will be used on each value in the list being...