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异常处理 异常就是程序运行时发生错误的信号（在程序出现错误时，则会产生一个异常，若程序没有处理它，则会抛出该异常，程序的运行也随之终止). 这种错误有两种, 一为语法错误, 二为逻辑错误 逻辑错误: #TypeError:int类型不可迭代 for i in 3: pass #ValueError 阅读全文
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Object-Oriented Programming Fundamental - Part 1 Object: can be quantified to mean one specific item - is an entity that has a state and a set of oper 阅读全文
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Process Description and Control How are processes represented and controlled by the OS? All modern OS is built around the concept of process OS fundam 阅读全文