var list with only one variable error

asked 2019-08-14 09:00:37 +0100

ortollj
1341 ●23 ●63 ●96

updated 2023-01-09 23:59:51 +0100

tmonteil
27413 ●31 ●204 ●517 http://wiki.sagemath.o...

SageMath 8.8 notebook OS=W10

why does it fail if L has only one variable ? :

L=['sd_1']
#L=['sd_1','sd_2']
varL=var(L)
show(varL)

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FWIW, when I run var(['x']) I get TypeError: unhashable type 'list'. Is this what you got? When reporting on a behavior please describe exactly the behavior you observed, and the behavior you expected instead.

Iguananaut ( 2019-08-14 12:44:46 +0100 )edit

In any case, whether or not you got what I did, there seems to be a bug here in the treatment of var() on a single-item list or tuple.

Iguananaut ( 2019-08-14 12:59:25 +0100 )edit

yes TypeError: unhashable type 'list' was the error I got

to avoid this error I did this little workaround:

if len(rL)==1 :
    rV=[var(rL[0])]
else :
    rV=var(rL)
cV=var(cL)

ortollj ( 2019-08-14 14:06:15 +0100 )edit

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