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Is there a command like Mathematica's Dynamic[] in Sage?

asked 2016-09-27 22:34:44 -0600

barrybr gravatar image

updated 2016-09-27 22:37:01 -0600

I'm on a Mac with OS 10.11.6 and I'm using Sage 7.2's notebook interface. I did things in Mathematica that I want to check in Sage, but I'm a beginner at Sage. In Mathematica it's possible to keep track of the execution of my code, especially to detect when it's hanging, by using the Mathematica Dynamic[] command. Is there anything like this command in Sage, or is there perhaps another way to track the progress of the execution of a lengthy computation that will let me know in real time if and when it hangs? At the moment I insert print commands in my code that result in thousands of tuples of values of a tuple of variables streaming vertically down my screen. Messy. I'd rather see the values of such a tuple simply update in place as they do, say, on a digital clock. (This is what Dynamic[] achieves in Mathematica.)

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There is a "profiling" section in the tutorial http://doc.sagemath.org/pdf/en/tutori... which could be helpful.

Mafra gravatar imageMafra ( 2016-09-30 06:17:21 -0600 )edit

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answered 2016-10-01 13:08:04 -0600

tmonteil gravatar image

updated 2016-10-01 14:47:24 -0600

Sage in written in Python, so you can benefit of any good things from it. Searching a couple of seconds on the web led me to the following:

sage: from time import sleep
sage: from sys import stdout
sage: for i in range(10):
....:     stdout.write("\rDoing thing %i" % i)
....:     stdout.flush()
....:     sleep(1)

There might even be dedicated libraries.

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This is fine for the command line, but not effective in the notebook. Output on stdout is appended to the cell rather than replacing its contents.

paulmasson gravatar imagepaulmasson ( 2016-10-01 14:49:33 -0600 )edit

Hmm, indeed. It works in the jupyter notebook however.

tmonteil gravatar imagetmonteil ( 2016-10-01 15:43:02 -0600 )edit

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Asked: 2016-09-27 22:34:44 -0600

Seen: 121 times

Last updated: Oct 01 '16