The following function demonstrates a hang problem in 2.9.3 (and
2.10.alpha4)
and a question about return types.
Kate
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def madness(n, func):
r"""
Test floor(func(n)) for strange behaviour...
EXAMPLES:
sage: version()
'SAGE Version 2.9.3, Release Date: 2008-01-05'
# one hangs
sage: madness(10.0,exp)
<type 'sage.rings.integer.Integer'> <type
'sage.rings.integer.Integer'>
'Life is sane.'
sage:madness(10,exp)
<class 'sage.calculus.calculus.SymbolicComposition'> <type
'sage.rings.integer.Integer'>
... hangs indefinitely ...
# One says Integer other says SymbolicComposition - is this
expected?
sage: madness(10.0,log)
<type 'sage.rings.integer.Integer'> <type
'sage.rings.integer.Integer'>
'Life is sane.'
sage: madness(10,log)
<class 'sage.calculus.calculus.SymbolicComposition'> <type
'sage.rings.integer.Integer'>
'This is madness.' # In sage-2.10.alpha4 returns 'Life is sane'
"""
ff = floor(func(n))
Iff = Integer(ff)
assert ff == Iff
print type(ff), type(Iff)
f = 0
while f < ff:
f = f + 1
if f == ff:
return "Life is sane."
else:
return "This is madness."
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