def

简明释义

英[def]美[def]

adj. （俚）极好的，首屈一指的

abbr. 被告（defendant）；防卫（defense）；下定义（defined）；定义（definition）；一定的（definite）

英英释义

单词用法

同义词

反义词

例句

1.If you like the photo, the high-def, slow-motion video of the clock exploding is even better.

对图片有意者，可以在高清晰慢动作的时钟爆炸视频中观看到更好的效果。

2.N.B. the keyword "def", used here as an instance variable modifier, indicates that the variables are properties.

请注意，关键字“def”在这儿作为一个实例变量的修饰符使用，指明变量是属性。

3.For example, the regular expression ABC will match the string ABC but not DEF.

例如，正则表达式abc将与字符串abc匹配，但不与def匹配。

4.The solution, of course, is to add the def keyword to numstr in the toString method.

当然，解决方案也是在toString方法中将 def关键字添加到 numstr。

5.The fight for better broadband is important not just so Americans can watch high-def videos of cute cats.

争取更好的宽带网络很重要，它不仅可以让美国人能够看到漂亮小猫的高清视频。

6.The R&B star struck a business deal with Braun; a Def Jam record contract soon followed.

这位R&B歌星和布劳恩签署了一份商业合约，很快DefJam唱片公司的合约也随之而来。

7.The def keyword can be extremely handy when it comes to writing simple scripts.

在编写简单的脚本时，def关键字会非常好用。

8.Be sure that both TripController and AirlineController contain def scaffold.

请确保TripController和AirlineController都包含def scaffold。

9.This is why your TV is so high-def, and your computer monitor is so bright and clear.

这就是为什么你的电视机是高清晰的，你的电脑显示屏又亮又清楚。

10.I can *def*initely say that this is the best pizza in town.

我可以*肯定*地说这是镇上最好的比萨。

11.She is *def*initely going to win the competition.

她*肯定*会赢得比赛。

12.This movie is *def*initely worth watching.

这部电影*绝对*值得一看。

13.We should *def*initely try that new restaurant.

我们*肯定*应该尝试那家新餐厅。

14.I *def*initely need a vacation soon.

我*绝对*需要尽快休假。

作文

In the world of programming, the term def is widely recognized as a keyword used in Python to define a function. Functions are essential components of programming that allow developers to encapsulate code into reusable blocks. The use of def signifies the beginning of a function definition, followed by the function name and its parameters. For example, if we want to create a function that adds two numbers, we would start with def add_numbers(num1, num2):. This simple line of code establishes a new function named 'add_numbers' that takes two inputs, num1 and num2. Understanding how to use def effectively can greatly enhance a programmer's ability to write clean and efficient code. Functions defined with def can be called multiple times throughout a program, which reduces redundancy and improves maintainability. By using def, programmers can break down complex problems into smaller, manageable pieces, making the overall code easier to understand. Moreover, the def keyword is not just limited to basic functions; it can also be used to define more advanced features such as default parameters, variable-length arguments, and even lambda functions. For instance, when defining a function with default parameters, you can specify default values that will be used if no argument is provided. This is done by using the syntax def greet(name='Guest'):. Here, if 'greet' is called without an argument, it will automatically use 'Guest' as the default name. Another powerful aspect of using def is the ability to return values from functions. A function can perform calculations or operations and then return the result to the caller using the return statement. For example, in our earlier function, we could add a return statement to send back the sum of num1 and num2: return num1 + num2. This allows other parts of the program to utilize the output of the function, promoting code reusability. In addition, the organization of code through the use of def contributes to better readability. When functions are clearly defined, it becomes easier for others (or even the original programmer) to follow the logic of the code. Instead of having long, convoluted scripts, breaking the code into functions using def creates a structured layout that enhances collaboration among developers. As programming languages evolve, the importance of understanding keywords like def remains constant. It serves as a fundamental building block for anyone looking to delve into the world of coding. Whether you are a beginner learning the ropes or an experienced developer refining your skills, mastering the use of def is crucial. In conclusion, the keyword def plays a vital role in Python programming by allowing developers to define functions that promote code reusability, clarity, and efficiency. Its ability to handle various complexities in programming makes it indispensable for both novice and seasoned programmers alike. Embracing the use of def in your coding practices will undoubtedly lead to better-designed software and a more enjoyable programming experience.

在编程世界中，术语def被广泛认可为用于在Python中定义函数的关键字。函数是编程的基本组成部分，允许开发人员将代码封装成可重用的块。使用def表示函数定义的开始，后面跟着函数名称及其参数。例如，如果我们想创建一个将两个数字相加的函数，我们可以从def add_numbers(num1, num2):开始。这行简单的代码建立了一个名为'add_numbers'的新函数，该函数接受两个输入，num1和num2。 有效理解如何使用def可以大大增强程序员编写干净高效代码的能力。使用def定义的函数可以在程序中多次调用，从而减少冗余，提高可维护性。通过使用def，程序员可以将复杂的问题分解为更小、更易管理的部分，使整体代码更易于理解。 此外，def关键字不仅限于基本函数；它还可以用于定义更高级的特性，例如默认参数、可变长度参数甚至lambda函数。例如，在定义带有默认参数的函数时，您可以指定默认值，如果不提供参数，则会使用该值。这是通过使用语法def greet(name='Guest'):完成的。在这里，如果没有参数调用'greet'，它将自动使用'Guest'作为默认名称。 使用def的另一个强大方面是能够从函数返回值。函数可以执行计算或操作，然后使用return语句将结果返回给调用者。例如，在我们之前的函数中，我们可以添加一个返回语句，以返回num1和num2的总和：return num1 + num2。这使得程序的其他部分可以利用函数的输出，促进代码的重用。 此外，通过使用def组织代码有助于提高可读性。当函数清晰定义时，其他人（甚至是原始程序员）就能更容易地跟随代码逻辑。与其拥有冗长而复杂的脚本，不如通过使用def将代码分解为函数，从而创建一个结构化的布局，增强开发人员之间的协作。 随着编程语言的发展，理解像def这样的关键字的重要性依然不变。它是任何希望深入编码世界的人的基本构建块。无论您是初学者学习基础知识，还是经验丰富的开发人员完善技能，掌握def的使用都是至关重要的。 总之，关键字def在Python编程中发挥着至关重要的作用，通过允许开发人员定义促进代码重用、清晰和高效的函数。它处理编程中的各种复杂性的能力使其对新手和经验丰富的程序员来说都是不可或缺的。在您的编码实践中拥抱使用def无疑会导致更好的软件设计和更愉快的编程体验。