Calling the length of a list of inequality strings result in an error

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Cyrille
1409 ●40 ●84 ●146

I wonder if this is a bug

sign=['>=', '<=', '=']
m1=[1 if (v=="<=" or v==">=") else 2 for v in sign]
m1

The len(m1) is defined but

y=var('y_',n=range(len(m1)))

return the error '>' not supported between instances of 'range' and 'int'

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Note that len(m1) will be the same as len(sign). Do you want the length of m1 or the number of distinct elements or the actual distinct elements? For the last of these, you could use var(['y_{}'.format(i) for i in set(m1)]).

John Palmieri ( 3 years ago )

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answered 3 years ago

tmonteil
27493 ●32 ●205 ●519 http://wiki.sagemath.o...

The n option for SR.var is supposed to be an integer, not an iterator. Do you mean the following ?

sage: y = var('y_', n=len(m1))
sage: y
(y_0, y_1, y_2)

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Yes I am stupid

Cyrille ( 3 years ago )

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Last updated: Mar 29 '22

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