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'DeprecationWarning' when using list comprehension

asked 2020-06-13 09:58:33 +0200

banksiaboy gravatar image

updated 2020-06-14 13:52:20 +0200

FrédéricC gravatar image

input_range = srange(-3,3,.02)

[sigmoid(x) for x in input_range]

gives warning:

DeprecationWarning: Substitution using function-call syntax and unnamed arguments is deprecated and will be removed from a future release of Sage; you can use named arguments instead, like EXPR(x=..., y=...)
    See _blah_ trac.sagemath.org/5930 for details.

Am I really doing something wrong here?

List comprehension syntax is prefered idiom in Python AFAIK

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markup keeps failing :-(

banksiaboy gravatar imagebanksiaboy ( 2020-06-13 10:03:51 +0200 )edit

list_plot(list(map(sigmoid,input_range)))

is ok

banksiaboy gravatar imagebanksiaboy ( 2020-06-13 10:14:21 +0200 )edit

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answered 2020-06-13 10:26:54 +0200

Sébastien gravatar image

The deprecation message is trying to tell you to do:

[sigmoid(x=x) for x in input_range]

where x= is the name of the symbolic variable inside of the expression sigmoid.

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OK, Thank-you.

banksiaboy gravatar imagebanksiaboy ( 2020-06-14 21:39:10 +0200 )edit

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Asked: 2020-06-13 09:58:33 +0200

Seen: 76 times

Last updated: Jun 14 '20