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Chapter 2 Building Abstract ions with Data Native Data Types 到目前为止，我们使用的值都是 Python 语言中内置的少量的原始数据类型的实例。原始数据类型具有以下属性： ^13b410 有一些可以求解为原始数据类型的表达式，被称为字面量（ 阅读全文
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4_3 Declarative Programming In addition to streams, data values are often stored in large repositories called databases. A database consists of a data 阅读全文
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3_5 Interpreters for Languages with Abstraction The Calculator language provides a means of combination through nested call expressions. However, ther 阅读全文
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2_9 Recursive Objects Objects can have other objects as attribute values. When an object of some class has an attribute value of that same class, it i 阅读全文
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2_7 Object Abstraction The object system allows programmers to build and use abstract data representations efficiently. It is also designed to allow m 阅读全文
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2_5 Object-Oriented Programming Object-oriented programming (OOP) is a method for organizing programs that brings together many of the ideas introduce 阅读全文
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lecture9 Welcome! Static to Dynamic Flask Layout POST Frosh IMs Flask and SQL Session Store API JSON Summing Up Welcome! In previous weeks, you have l 阅读全文
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lecture8 Routers 为了将数据从一个地方转到另一个地方，我们需要做转发决定，也就是说需要某人来决定将数据转发到哪里。这个人就是路由器。 TCP/IP 是两个协议，允许计算机间数据在网上传输。 IP 是 Internet Protocol 的缩写，它是一种协议，它定义了如何将数据从一个计 阅读全文
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lecture7 Flat-File Database 数据常常可以视作表格，每一行是一个记录，每一列是一个属性 电子表格例如Excel，Google Spreadsheet可以导出为csv格式文件。csv文件是纯文本文件，每一行是一个记录，每一列用逗号分隔，可以看作是最简单的数据库 csv文件被称 阅读全文
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lecture5 Queues are one form of abstract data structure. Queues have specific properties. Namely, they are FIFO or “first in first out.” You can imagi 阅读全文