When trying to latex-print symbolic functions, I have seen the following
weird behavior:
sage: P=function('P',x)
sage: latex(P(x=sin(0)))
Traceback (click to the left of this block for traceback)
...
AttributeError: 'int' object has no attribute '_latex_'
The superficial reason for this behavior is that, if a symbolic function
has arguments without a _latex_ attribute, then its latex printing
fails. This is easy to fix, I have written a (very easy to review) patch
in TRAC 13632.
However, the deeper reason is that, even when 0 is a sage integer,
sin(0) is a Python integer:
sage: type(sin(0))
<type 'int'>
I was wondering if this behavior was by design, or how it could be fixed.
By the way, if I understand things correctly, it can even happen in a
similar situation that the product of two sage integers is a Python integer:
sage: var('x, y, z')
sage: P=function('P', x)
sage: latex(P(x=y*z)(y=0, z=0))
Traceback (click to the left of this block for traceback)
...
AttributeError: 'int' object has no attribute '_latex_'
SG
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