Hello,
I am trying to use a recently installed module "control" in Sage. However, I run into issues with what seems like the variable type.
Below is an image of me running the same code side-by-side. Left is in Sage. Right is in the Sage repository's python kernel. I think the issue is regarding the variable types but I am not sure. Does someone have any insight to offer?
It looks like the control module is restrictive, I would say too restrictive, on the classes it allows. The error arises in a function _clean_part, which starts
valid_types = (int, float, complex, np.number)
so it will not accept Sage integers, which have type sage.rings.integer.Integer. You can fix this by just using Python ints, and this has to be done either explicitly:
tf(int(1), [int(1), int(10), int(20)])
or by turning off Sage's preparser:
preparser(False)
tf(1, [1, 10, 20])
(The preparser automatically converts an integer like "7" to a Sage integer, it converts ^ to the exponentiation operator, and does a few other things which are natural for a mathematical audience.)
@Sébastien: yes, good point, and should also work for floats.
Asked: 2022-09-15 01:27:20 +0100
Seen: 588 times
Last updated: Sep 15 '22
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