Think Python: How to Think Like a Computer Scientist:http://greenteapress.com/thinkpython/html/index.html…

decimal — Decimal fixed point and floating point arithmetic — Python 3.8.0a0 documentation https://docs.python.org/dev/library/decimal.html Eric Price and Facundo Batista’s Python Decimal Class has been in Python since Python 2.4, and was significant…

http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html…

Floating Point Math Your language isn't broken, it's doing floating point math. Computers can only natively store integers, so they need some way of representing decimal numbers. This representation comes with some degree of inaccuracy. That's why, m…

This started out as a list of top Computer Science blogs, but it more closely resembles a set: the order is irrelevant and there are no duplicate elements; membership of this set of blogs satisfies all of the following conditions: they are written by…

Given the expansive growth in the field, it's become challenging to discern what belongs in a modern computer science degree. My own faculty is engaging in this debate, so I've coalesced my thoughts as an answer to the question, "What should every co…

http://javarevisited.blogspot.sg/2014/05/10-articles-every-programmer-must-read.html Being a Java programmer and Software developer, I have learned a lot from articles titled as What Every Programmer Should Know about ..... , they tend to give a lot…

threading — Higher-level threading interface¶ Source code: Lib/threading.py This module constructs higher-level threading interfaces on top of the  lower level thread module. See also the mutex and Queue modules. The dummy_threading module is provide…

@"0.01" 转换成float时, 经常会变成  0.009999799 这种形式, 因为float类型无法精准保存, 系统会选一个接近的值来代替. 而double类型则可以有更好的精度. http://stackoverflow.com/questions/9328260/converting-nsstring-to-float-adds-in-decimal-places Your issue seems to be that you don't understand how f…

01 关于本书 02 代码约定 03 关于例子 04 如何联系我们 1 核心模块 11 介绍 111 内建函数和异常 112 操作系统接口模块 113 类型支持模块 114 正则表达式 115 语言支持模块 12 _ _builtin_ _ 模块 121 使用元组或字典中的参数调用函数 1211 Example 1-1 使用 apply 函数 1212 Example 1-2 使用 apply 函数传递关键字参数 1213 Example 1-3 使用 apply 函数调用基类的构造函数 122…