查看“︁SymPy”︁的源代码

{{Infobox software
| name                   = SymPy
| logo                   = [[Image:sympy-160px.png|160px]]
| developer              = Ondřej Čertík和Aaron Meurer等
| released               = {{Start date and age|2007}}
| latest release version = 1.6.2
| latest release date    = {{Start date and age|2020|08|10|df=yes}}
| status                 = Active
| programming language   = [[Python]]
| operating system       = [[跨平台]]
| genre                  = [[计算机代数系统]]
| license                = 修正的[[BSD许可证]]<ref name="donate">{{Cite web |url=http://sympy.org/en/donate.html |title=Support SymPy Development |accessdate=2013-11-03 |archive-date=2013-11-04 |archive-url=https://web.archive.org/web/20131104103003/http://sympy.org/en/donate.html |dead-url=no }}</ref>
| website                = {{URL|http://sympy.org/}}
}}

'''SymPy'''是一个符号计算的[[Python]][[库 (计算机)|库]]。它的目标是成为一个全功能的[[计算机代数系统]]，同时保持代码简洁、易于理解和扩展。它完全由[[Python语言]]写成，不依赖于外部库。<ref name="sympy.org">{{Cite web |url=http://sympy.org/ |title=SymPy官方网站 |accessdate=2013-11-03 |archive-date=2019-11-20 |archive-url=https://web.archive.org/web/20191120004825/https://www.sympy.org/ |dead-url=yes }}</ref>

SymPy支持符号计算、[[高精度计算]]、[[模式匹配]]、[[圖形計算機|绘图]]、[[解方程]]、[[微积分]]、[[组合数学]]、[[离散数学]]、[[几何学]]、[[概率与统计]]、[[物理学]]等方面的功能。<ref name="sympy.org" /><ref>{{Cite web |url=http://www.oschina.net/p/sympy/ |title=Python代数计算库 SymPy - 开源中国 |accessdate=2013-11-03 |archive-date=2013-11-04 |archive-url=https://web.archive.org/web/20131104031423/http://www.oschina.net/p/sympy/ |dead-url=no }}</ref>

SymPy在新[[BSD许可证]]下开源。<ref name="donate" />

==用例==
求<math>f(x) = \frac{x^2+2x+1+(3x+1)\sqrt{x+\ln x}}{x\,\sqrt{x+\ln x}(x+\sqrt{x+\ln x})}</math>的积分：
<syntaxhighlight lang="python">
>>> from sympy import init_printing, integrate, log, sqrt, symbols
>>> init_printing()
>>> x = symbols('x')
>>> g = sqrt(x + log(x))
>>> f = (x ** 2 + 2 * x + 1 + (3 * x + 1) * g) / (x * g * (x + g))
>>> f
 2           ____________              
x  + 2⋅x + ╲╱ x + log(x) ⋅(3⋅x + 1) + 1
───────────────────────────────────────
   ⎛      ____________⎞   ____________ 
 x⋅⎝x + ╲╱ x + log(x) ⎠⋅╲╱ x + log(x)  
>>> integrate(f, x)
    ____________        ⎛      ____________⎞
2⋅╲╱ x + log(x)  + 2⋅log⎝x + ╲╱ x + log(x) ⎠
</syntaxhighlight>

==参考资料==
<references />

==外部链接==
*[http://live.sympy.org/  SymPy Live]{{Wayback|url=http://live.sympy.org/ |date=20131104110423 }}, 可以在这里在线使用SymPy
*[http://www.sympygamma.com SymPy Gamma]{{Wayback|url=http://www.sympygamma.com/ |date=20200708142019 }}, SymPy版的[[Wolfram Alpha]]
*[https://github.com/sympy/sympy/ SymPy on GitHub]{{Wayback|url=https://github.com/sympy/sympy/ |date=20140704074450 }}, SymPy的[[GitHub]]页面

{{计算机代数系统}}

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