Hi Jason,
That's true that it's an invalid character for python variables, but not
for sympy variables. For instance, doing:
s = Symbol('base.length')
works just fine.
I was under the impression that sympify's inputs is treated as a string
version of a sympy expression, *NOT* a Python expression. This seems to be
what the documentation implies: http://docs.sympy.org/dev/modules/core.html.
Shouldn't this work? I feel like either the documentation is
misleading/ambiguous or the function is not matching the specification.
Is there a workaround you would recommend that will properly parse periods
as Symbol does?
-Andy S.
On Tue, Dec 30, 2014 at 1:23 AM, Jason Moore <[email protected]> wrote:
> Andy,
>
> The period is an invalid character for Python variables. The period is
> reserved for accessing attributes and methods of Python objects.
>
>
> Jason
> moorepants.info
> +01 530-601-9791
>
> On Mon, Dec 29, 2014 at 5:48 PM, Andrew Spielberg <[email protected]>
> wrote:
>
>> Hi guys,
>>
>> I have a variable with a period in it (say, 'base.length'). I now wish
>> to sympify an expression, say:
>>
>> 2*base.length
>>
>> This throws an exception,
>>
>> AttributeError: 'Symbol' object has no attribute 'length'
>>
>> due to the period. Is there a way I can have the sympify read the dot as
>> just part of a variable name here?
>>
>> -Andy S.
>>
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