在SageMath中绘制椭圆曲线

时间:2016-03-23 18:45:26

标签: sage python

我从未在生活中使用过SageMath,我依靠互联网进行速成课程,了解如何从SageMath中获取我想要的东西(在有限域上绘制椭圆曲线)。

我使用this code,粘贴在下面:

@interact
def f(label='37a', p=tuple(prime_range(1000))):
 try: E = EllipticCurve(label)
 except:
 print "invalid label %s"%label; return
 try:
show(graphics_array([plot(E,thickness=3),plot(E.change_ring(GF(p)))]),frame=True)
 except Exception, msg:
 print msg

似乎缺少一个支架,但我没有经验知道它应该去哪里。我得到的错误信息是:

Error in lines 1-6
Traceback (most recent call last):
  File "/projects/sage/sage-6.10/local/lib/python2.7/site-packages/smc_sagews/sage_server.py", line 905, in execute
    exec compile(block+'\n', '', 'single') in namespace, locals
  File "<string>", line 4
    except:
          ^
IndentationError: unindent does not match any outer indentation level

1 个答案:

答案 0 :(得分:1)

您提供的错误似乎表明except:之后的行不缩进超过except:。 Python非常关注缩进级别。

您可以尝试以下操作。

@interact
def f(label='37a', p=tuple(prime_range(1000))):
    try:
        E = EllipticCurve(label)
    except:
        print "invalid label %s"%label; return
    try:
        show(graphics_array([plot(E,thickness=3), plot(E.change_ring(GF(p)))]), frame=True)
    except Exception, msg:
        print msg

除此之外:您应该在代码之前使用四个空格将它们显示为代码块。有关更多信息,请参阅How do I format My Code Blocks?