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saving calculated results problem

asked 2012-10-16 22:11:55 -0600

anonymous user

Anonymous

I have a few vectors as calculated results, how do I write them to a file/files so I can retrieve them in the notebook later?

I tried save and load, but whenever I restart the workbook, I cannot get my objects back.

The examples in Sage always use SAGE_TMP as the file name, if I change the name, I cannot even save the object.

If I do use SAGE_TMP, is it kind of like a clipboard, can only store one object at a time?

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answered 2012-10-16 23:39:37 -0600

Volker Braun gravatar image

SAGE_TMP is the Sage temp directory. This will always be deleted after you quit Sage, so as the name implies you should only use it for temporary files.

You need sufficient permissions to save a file anywhere else. If you run the sage server yourself then you should be able to save files anywhere in your home directory. On sagenb.org you obviously can't write files anywhere outside of SAGE_TMP

If the data you want to store is not too long then you can just pickle them into a string:

sage: v = vector([1,2/3,4/5])
sage: v
(1, 2/3, 4/5)
sage: v.dumps()
'x\x9cu\x8f\xbbN\x031\x10E\x958\x810\x10\x1e\x7f\x01\x8d\xa3\xe5\xf1\x0biVPX\xda2\xb2\x1c\xefd\xb1\xd6\xb13~D\xa2@\xa2A\xc0_\xb3\tK*\xe8\xce-\xce\x9d;oC\x1dU\x83|\xed\xebl1\xf2-\xea\xe4\x83\x0c*\x19\xef\x94\x955\xba\x88\x90\xdd\xc6\xe8\xd6\xa2\xdc\x16@\x83\xeb\x1f%\xa6\x90u\xca\x01\xf9J\xed\xa4\x17h\xd0a0Z\xf6Y\xfej@\xc3\x7f\x1d\xeb}\x9b7\xb2\xb1~\xa9,\x10\xab`\x1e\x10\x1f\xf7sh\xf4.h\\\x8e\xcbQ\xc5\x82.>\xe8\xa8\xaf\t\xc65\x91\x1fF\xae\x0c\xda\x1aD\x1f\xe7\xfbD\xc77\x82&%\xfbzJt\xf2\x9a\x08\x04\x9d.\xe8\xec\xcf\x02X\xab\x16\x0f?\x03M\xabA\xd1]>\x7f\x9eV\xecvv\xd7\xe1\xc5\x0e\xefg\x0f\x1d^b\xc9>\x93\xa0+\xfe\rV\x95m\xe3'

Restart...

sage: loads('x\x9cu\x8f\xbbN\x031\x10E\x958\x810\x10\x1e\x7f\x01\x8d\xa3\xe5\xf1\x0biVPX\xda2\xb2\x1c\xefd\xb1\xd6\xb13~D\xa2@\xa2A\xc0_\xb3\tK*\xe8\xce-\xce\x9d;oC\x1dU\x83|\xed\xebl1\xf2-\xea\xe4\x83\x0c*\x19\xef\x94\x955\xba\x88\x90\xdd\xc6\xe8\xd6\xa2\xdc\x16@\x83\xeb\x1f%\xa6\x90u\xca\x01\xf9J\xed\xa4\x17h\xd0a0Z\xf6Y\xfej@\xc3\x7f\x1d\xeb}\x9b7\xb2\xb1~\xa9,\x10\xab`\x1e\x10\x1f\xf7sh\xf4.h\\\x8e\xcbQ\xc5\x82.>\xe8\xa8\xaf\t\xc65\x91\x1fF\xae\x0c\xda\x1aD\x1f\xe7\xfbD\xc77\x82&%\xfbzJt\xf2\x9a\x08\x04\x9d.\xe8\xec\xcf\x02X\xab\x16\x0f?\x03M\xabA\xd1]>\x7f\x9eV\xecvv\xd7\xe1\xc5\x0e\xefg\x0f\x1d^b\xc9>\x93\xa0+\xfe\rV\x95m\xe3')
(1, 2/3, 4/5)
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Comments

To clarify, the examples in the reference use `SAGE_TMP` so that Sage doesn't create nasty extra files while doctesting.

kcrisman gravatar imagekcrisman ( 2012-10-17 02:04:59 -0600 )edit

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Asked: 2012-10-16 22:11:55 -0600

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Last updated: Oct 16 '12