weirdest bug ever

Martin R

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Mar 9, 2024, 5:22:48 PM3/9/24

to sage-devel

Consider the following innocent definition:

def bug():

"""
sage: c = bug()
sage: c.coefficients_mononomials()
"""
R.<x1, x2, x3> = QQ[]
p = 20*x1^2 + 20*x1*x2 + 20*x2^2 + 20*x1*x3 + 20*x2*x3 + 20*x3^2

return Sequence([p])

If I store this in a file "bug.sage" I can do:

sage: load('/home/martin/bug.sage')
sage: c = bug()
sage: c.coefficients_mononomials()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)

...

However, if I use tab-completion in the last line (i.e., to get `coefficients_monomials`), it is found and I obtain the correct result.

Why? How can I debug this?

Martin

Gareth Ma

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Mar 9, 2024, 5:24:20 PM3/9/24

to 'Martin R' via sage-devel

You typed `mononomials` instead of `monomials`. That's a nono.

Martin R

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Mar 10, 2024, 4:45:55 AM3/10/24

to sage-devel

Oh no! Thank you!

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