Comment #1 on issue 2133 by asmeurer: Merge new polynomials manipulation
module
http://code.google.com/p/sympy/issues/detail?id=2133
I don't know how to run cythonized tests. Otherwise, I have tested every
combination, except that I do not have 64-bit Python 2.4 and I do not have
gmpy installed for Python 2.4.
All the test failures that I see in the ode module can be changed. They
are simply a result of dsolve returning a different solution due to better
simplification (things like sqrt(2 + a) instead of sqrt(8 + 4*a)/2).
Actually, you don't have to worry too much about updating dsolve tests in
cases like this because each test is verified with checkodesol().
I also get a failure with ratint. Basically, we are now getting:
In [36]: ratint(1/(x**2 + 1), x, real=False)
Out[36]:
⎛ 2 ⎞
RootSum⎝4⋅t + 1, Λ(t, t⋅log(x + 2⋅t))⎠
instead of
In [37]: ratint(1/(x**2 + 1), x, real=False)
Out[37]:
ⅈ⋅log(x + ⅈ) ⅈ⋅log(x - ⅈ)
──────────── - ────────────
2 2
which I guess is wrong. This is probably similar to the issue in comment
16 of issue 2132.
I get this failure with python ground types in 32-bit Python 2.6 and 64-bit
Python 2.7 (just those two),
______________ sympy/polys/tests/test_polytools.py:test_intervals
______________
File "/users/aaronmeurer/documents/python/sympy/sympy/sympy/polys/tests/test_polytools.py",
line 1841, in test_intervals
[((-S(71)/5, -S(85)/6), {1: 1}), ((-S(85)/6, -14), {0: 1}), ((14,
S(85)/6), {0: 1}), ((S(85)/6, S(71)/5), {1: 1})]
AssertionError
I too get the failure in Python 2.4. This is the traceback:
Traceback (most recent call last):
File "setup.py", line 262, in ?
cmdclass = {'test': test_sympy,
File "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/distutils/core.py",
line 149, in setup
dist.run_commands()
File "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/distutils/dist.py",
line 946, in run_commands
self.run_command(cmd)
File "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/distutils/dist.py",
line 966, in run_command
cmd_obj.run()
File "setup.py", line 159, in run
if sympy.test():
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/utilities/runtests.py",
line 141, in test
return t.test(sort=sort)
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/utilities/runtests.py",
line 316, in test
self.test_file(f)
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/utilities/runtests.py",
line 351, in test_file
if isgeneratorfunction(funcs[i]):
IndexError: list index out of range
However, there is a failure in Python 2.4 that you won't see when you run
all the tests because of this. You can get it by running python2.4
bin/test sympy/polys/tests/test_polyroots.py. The failure is
____________ sympy/polys/tests/test_polyroots.py:test_roots_quartic
____________
File "/users/aaronmeurer/documents/python/sympy/sympy/sympy/polys/tests/test_polyroots.py",
line 68, in test_roots_quartic
assert all([eq.subs(x, ai).n(chop=True) == 0 for ai in ans])
NameError: global name 'all' is not defined
Actually, this failure also exists in master, but it's in the polys module,
so you might as well fix it.
There are four additional doctest failures not related to issue 2041. The
ode ones just need to be updated to show the new thing (similar to the ode
failures above). For the other, you just need to update the symbols()
syntax:
____________________ sympy.core.function.expand_multinomial
____________________
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/core/function.py",
line
1036, in sympy.core.function.expand_multinomial
Failed example:
x, y = symbols('xy', positive=True)
Exception raised:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/doctest.py",
line 1248, in __run
compileflags, 1) in test.globs
File "<doctest sympy.core.function.expand_multinomial[1]>", line 1,
in ?
x, y = symbols('xy', positive=True)
TypeError: unpack non-sequence
**********************************************************************
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/core/function.py",
line
1037, in sympy.core.function.expand_multinomial
Failed example:
expand_multinomial((x + exp(x + 1))**2)
Exception raised:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/doctest.py",
line 1248, in __run
compileflags, 1) in test.globs
File "<doctest sympy.core.function.expand_multinomial[2]>", line 1,
in ?
expand_multinomial((x + exp(x + 1))**2)
NameError: name 'x' is not defined
________________________________________________________________________________
_______________________ sympy.solvers.ode.ode_Liouville
________________________
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/solvers/ode.py",
line
2130, in sympy.solvers.ode.ode_Liouville
Failed example:
pprint(dsolve(diff(f(x), x, x) + diff(f(x), x)**2/f(x) +
diff(f(x), x)/x, f(x), hint='Liouville'))
Expected:
________________ ________________
[f(x) = -\/ C1 + C2*log(x) , f(x) = \/ C1 + C2*log(x) ]
Got:
___ ________________ ___ ________________
[f(x) = -\/ 2 *\/ C1 + C2*log(x) , f(x) = \/ 2 *\/ C1 + C2*log(x) ]
________________________________________________________________________________
________ sympy.solvers.ode.ode_1st_homogeneous_coeff_subs_indep_div_dep
________
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/solvers/ode.py",
line
1756, in sympy.solvers.ode.ode_1st_homogeneous_coeff_subs_indep_div_dep
Failed example:
pprint(dsolve(genform, f(x),
hint='1st_homogeneous_coeff_subs_indep_div_dep_Integral'))
Expected:
x
----
f(x)
/
|
| -g(u2)
| ---------------- d(u2)
| u2*g(u2) + h(u2)
|
/
f(x) = C1*e
Got:
x
----
f(x)
/
|
| g(u2)
| ----------------- d(u2)
| -h(u2) - u2*g(u2)
|
/
<BLANKLINE>
f(x) = C1*e
________________________________________________________________________________
__________________________ sympy.solvers.ode.odesimp
___________________________
File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/solvers/ode.py",
line
136, in sympy.solvers.ode.odesimp
Failed example:
pprint(eq)
Expected:
x
----
f(x)
/
|
| /1 \
| 1 + u2*sin|--|
| \u2/ /f(x)\
- | -------------------------- d(u2) + log|----| = 0
| / /1 \\ \ C1 /
| - |1 + u2*sin|--||*u2 + u2
| \ \u2//
|
/
<BLANKLINE>
Got:
x
----
f(x)
/
|
| / /1 \\
| -|1 + u2*sin|--||
| \ \u2// /f(x)\
- | ----------------- d(u2) + log|----| = 0
| 2 /1 \ \ C1 /
| u2 *sin|--|
| \u2/
|
/
<BLANKLINE>
============ tests finished: 779 passed, 4 failed, in 88.63 seconds
============
There is an XPass test in test_ode.py that passes everywhere, so it can
probably be converted to a regular test (there must be a bug in the test
runner, because it won't tell me which test it is).
Finally, consider cherry-picking the remaining polys related fixes from my
integration3 branch. The remaining doctests aren't too important for the
release, but the remainder are bug fixes that would be nice to have.
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