November 2022
Intermediate to advanced
392 pages
10h 8m
Chinese
Content preview from Python算法交易
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336
｜
附录
有关应用于金融的
Python
的全面概述，请参阅
Hilpisch
（
2018
）。其他更一般的介绍，
主讲科学和数据分析语言
VanderPlas
（
2017
）和
McKinney
（
2017
）。
Python
基础
本节介绍基本的
Python
数据类型和结构、控制结构和一些
Python
习语。
数据类型
值得注意的是，
Python
通常是一个动态类型系统，这意味着对象的类型是从它们的
上下文中推断出来的。让我们从数字开始。
In [1]: a = 3
In [2]: type(a)
Out[2]: int
In [3]: a.bit_length()
Out[3]: 2
In [4]: b = 5.
In [5]: type(b)
Out[5]: float
为变量名分配一个整数值
3
。
查看
a
的类型。
查看用于存储整数值的位数。
给变量名
b
赋一个浮点值
5.0
例如，
Python
可以处理任意大的整数，这对数论应用非常有益。
In [6]: c = 10 ** 100
In [7]: c
Out[7]:
100000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000
Python
、
NumPy
、
matplotlib
和
pandas
｜
337
In [8]: c.bit_length()
Out[8]: 333
分配一个“巨大”的整数值。
显示用于整数表示的位数。 ...
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