2017年6月8日
scipy
摘要： scipy 阅读全文
posted @ 2017-06-08 23:45 papering 阅读(168) 评论(0) 推荐(0)
字符串 编码 utf-8 unicode asicc
摘要： http://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001386819196283586a37629844456ca7e5a7faa9b94ee8000 阅读全文
posted @ 2017-06-08 23:09 papering 阅读(212) 评论(0) 推荐(0)
python比C程序相比非常慢
摘要： w http://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/0013747381369301852037f35874be2b85aa318aad57bda000 第一个缺点就是运行速度慢，和 阅读全文
posted @ 2017-06-08 22:44 papering 阅读(566) 评论(0) 推荐(0)
装饰器函数 包装函数 包裹函数
摘要： import reimport tracebackfrom itertools import chainfrom functools import partialfrom timeit import default_timer as timerfrom .decorators import deco 阅读全文
posted @ 2017-06-08 22:43 papering 阅读(477) 评论(0) 推荐(0)
刚性方程 Stiff equation
摘要： In mathematics, a stiff equation is a differential equation for which certain numerical methods for solving the equation are numerically unstable, unl 阅读全文
posted @ 2017-06-08 19:19 papering 阅读(477) 评论(0) 推荐(0)
matlab
摘要： x = 0 :0.02:pi y = sin(x).*exp((2*x+3)) plot(x,y) 阅读全文
posted @ 2017-06-08 18:46 papering 阅读(149) 评论(0) 推荐(0)
if isinstance(obj, int):
摘要： http://legacy.python.org/dev/peps/pep-0008/ Object type comparisons should always use isinstance() instead of comparing types directly. When checking 阅读全文
posted @ 2017-06-08 18:30 papering 阅读(625) 评论(0) 推荐(0)
''.startswith() and ''.endswith() instead of string slicing to check for prefixes or suffixes.
摘要： w http://legacy.python.org/dev/peps/pep-0008/ Yes: if foo.startswith('bar'):No: if foo[:3] == 'bar': 阅读全文
posted @ 2017-06-08 18:29 papering 阅读(156) 评论(0) 推荐(0)