1.4 形式和自然语言(formal and natural language) 自然语言(natural languages)是人所说的语言,如汉语、英语、西班牙语、法语等。 形式语言(formal languages)是由人为特定应用而设计的语言,有严格的语法规则,如数学应用中的符号(3 + 3 = 6),化学中代表分子结构的符号(H2O)等。 编程语言是为表达计算而设计的形...
程序员用许多不同的编程语言来编写代码。在过去,编程的难度更大,因为程序员必须要使用晦涩难懂的底层编程语言( low-level programming language ) ,如汇编语言( assembly language )。说一门编程语言是底层语言,指的是其与高级编程语言(读起来更像英语的编程语言)相比,更接近用二进制(0和1)编写指令,因此也更难理...
8— Finding good utility code You’ve heard the expression “standing on the shoulders of giants.” Python is an exceedingly well-resourced language. You can speed up your data science discoveries by recognizing you don’t have to go it alone — you can and should reuse the utility code of...
Building a similar structure in a low-level language like C would be tedious and require much more code: we would have to lay out and declare structures and arrays, fill out values, link everything together, and so on. In Python, this is all automatic—running the expression creates the ...
C: C, being a low-level language, may not witness groundbreaking innovations like Python and Java. However, its strong foundation in system programming ensures its relevance in emerging technologies such as the Internet of Things (IoT) and embedded systems. ...
As a high-level “glue” language, Python is increasingly being used for rapid visualization of big datasets and to coordinate large-scale computations that run in compiled languages like C and FORTRAN. It’s now relatively common to deal with datasets hundreds of gigabytes or even terabytes in...
The book covers key language concepts that must be understood to program effectively, especially for data analysis applications. Certain low-level language features are discussed in detail, especially Python memory management and data structures. Using Python effectively means taking advantage of its vast...
l ow-level language: A programming language that is designed to be easy for a computer to run; also called “machine language” or “assembly language”. 低级语言:设计初衷为易于被计算机运行的语言,比如机器语言和汇编语言。 portability: A property of a program that can run on more than one ki...
这是用汇编语言编写的一段代码,可以输出0到9。汇编语言是一种Low-level programming language。这种语言不易编写和阅读,因为这种语言是为计算机设计的而不是人类。 没有人愿意使用这种编程语言,但在过去它是有必要的。上世纪90年代的一些speed-critical computer games, 例如Doom和Quake就是用汇编语言编写的。