I'm trying to modify sympy to retain the restriction on log(exp(arg))
applying to only real args. I have most things worked out but have a
curious problem with Order where the order of addition is affecting
the result.
________________ sympy\series\tests\test_order.py:test_simple_6
________________
File "c:\documents and settings\chris\sympy\sympy\series\tests
\test_order.py",
line 53, in test_simple_6
assert Order(x)+Order(exp(1/x)) == Order(exp(1/x))
AssertionError
________________________________________________________________________________
_______________ sympy\series\tests\test_order.py:test_contains_1
_______________
File "c:\documents and settings\chris\sympy\sympy\series\tests
\test_order.py",
line 74, in test_contains_1
assert not Order(x).contains(Order(exp(1/x)))
AssertionError
============= tests finished: 24 passed, 2 failed, in 0.94 seconds
=============
DO *NOT* COMMIT!
C:\Documents and Settings\chris>\py
Here, I show the problem:
C:\Documents and Settings\chris>\python26\python.exe
Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit
(Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from sympy import *
>>> var('x')
x
>>> Order(x)
O(x)
>>> Order(exp(1/x))
O(exp(1/x))
>>> _+O(x) <<<----adding on the right
O(exp(1/x))
>>> O(x)+_ <<<----adding on the left gives a different result
O(x)
Does anyone have an idea why this might be happening?
If you want to take a look, this is in my "2 failing..." commit
a9856fe in t2 at github/smichr
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