【发布时间】：2012-05-29 10:34:58
【问题描述】：
Scipy 新手。
我已经安装了 scipy 和 numpy，但是当我运行 scipy.test() 时，我得到很多测试失败。 我试图找到一些常见的原因，我找到了几个：
>>> import scipy
>>> scipy.test()
Running unit tests for scipy
NumPy version 1.6.2
NumPy is installed in /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy
SciPy version 0.10.1
SciPy is installed in /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy
Python version 2.7.3 (default, Apr 19 2012, 00:55:09) [GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)]
nose version 1.1.2
...
AssertionError:
Arrays are not almost equal to 7 decimals
...
AssertionError:
Not equal to tolerance rtol=1e-10, atol=1e-305
...
AssertionError:
Arrays are not almost equal to 4 decimals
...
AssertionError:
Max |adiff|: 92783.6
Max |rdiff|: 0.353942
听起来像是 MPI 问题之类的，但我真的不知道。
任何帮助将不胜感激。
最好的，乔纳森。
-------- 编辑 --------- 用 scipy.test(verbose=10) 试了一下。 大多数测试似乎工作正常。 失败以错误开始。这就是我得到的：
ERROR: Failure: DeprecationWarning (
The scipy.maxentropy module is deprecated in scipy 0.10, and scheduled to be
removed in 0.11.
If you are using some of the functionality in this module and are of the
opinion that it should be kept or moved somewhere - or you are even interested
to maintain/improve this whole module - please ask on the scipy-dev mailing
list.
The logsumexp function has already been moved to scipy.misc.)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/loader.py", line 390, in loadTestsFromName
addr.filename, addr.module)
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/importer.py", line 39, in importFromPath
return self.importFromDir(dir_path, fqname)
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/importer.py", line 86, in importFromDir
mod = load_module(part_fqname, fh, filename, desc)
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/maxentropy/__init__.py", line 19, in <module>
DeprecationWarning)
DeprecationWarning:
The scipy.maxentropy module is deprecated in scipy 0.10, and scheduled to be
removed in 0.11.
If you are using some of the functionality in this module and are of the
opinion that it should be kept or moved somewhere - or you are even interested
to maintain/improve this whole module - please ask on the scipy-dev mailing
list.
The logsumexp function has already been moved to scipy.misc.
======================================================================
FAIL: test_asum (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/lib/blas/tests/test_blas.py", line 58, in test_asum
assert_almost_equal(f([3,-4,5]),12)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: 0.0
DESIRED: 12
======================================================================
FAIL: test_dot (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/lib/blas/tests/test_blas.py", line 67, in test_dot
assert_almost_equal(f([3,-4,5],[2,5,1]),-9)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: 0.0
DESIRED: -9
======================================================================
FAIL: test_nrm2 (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/lib/blas/tests/test_blas.py", line 78, in test_nrm2
assert_almost_equal(f([3,-4,5]),math.sqrt(50))
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: 0.0
DESIRED: 7.0710678118654755
======================================================================
FAIL: test_basic.TestNorm.test_overflow
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
self.test(*self.arg)
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/linalg/tests/test_basic.py", line 581, in test_overflow
assert_almost_equal(norm(a), a)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 451, in assert_almost_equal
return assert_array_almost_equal(actual, desired, decimal, err_msg)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 846, in assert_array_almost_equal
header=('Arrays are not almost equal to %d decimals' % decimal))
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 677, in assert_array_compare
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
(mismatch 100.0%)
x: array(-0.0)
y: array([ 1.00000002e+20], dtype=float32)
======================================================================
FAIL: test_basic.TestNorm.test_stable
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
self.test(*self.arg)
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/linalg/tests/test_basic.py", line 586, in test_stable
assert_almost_equal(norm(a) - 1e4, 0.5)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: -10000.0
DESIRED: 0.5
======================================================================
FAIL: test_basic.TestNorm.test_types
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
self.test(*self.arg)
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/linalg/tests/test_basic.py", line 568, in test_types
assert_allclose(norm(x), np.sqrt(14), rtol=tol)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 1213, in assert_allclose
verbose=verbose, header=header)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 677, in assert_array_compare
raise AssertionError(msg)
AssertionError:
Not equal to tolerance rtol=2.38419e-06, atol=0
(mismatch 100.0%)
x: array(1.0842021724855044e-19)
y: array(3.7416573867739413)
======================================================================
FAIL: test_asum (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/linalg/tests/test_blas.py", line 99, in test_asum
assert_almost_equal(f([3,-4,5]),12)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: 0.0
DESIRED: 12
======================================================================
FAIL: test_dot (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/linalg/tests/test_blas.py", line 109, in test_dot
assert_almost_equal(f([3,-4,5],[2,5,1]),-9)
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: 0.0
DESIRED: -9
======================================================================
FAIL: test_nrm2 (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/linalg/tests/test_blas.py", line 127, in test_nrm2
assert_almost_equal(f([3,-4,5]),math.sqrt(50))
File "/Library/Python/2.7/site-packages/numpy/testing/utils.py", line 467, in assert_almost_equal
raise AssertionError(msg)
AssertionError:
Arrays are not almost equal to 7 decimals
ACTUAL: 0.0
DESIRED: 7.0710678118654755
----------------------------------------------------------------------
Ran 5101 tests in 56.140s
FAILED (KNOWNFAIL=12, SKIP=42, errors=1, failures=9)
<nose.result.TextTestResult run=5101 errors=1 failures=9>
很抱歉，我不知道这些错误是什么意思。
【问题讨论】：
-
似乎 numoy 也失败了。问题是它需要小数点后7-8位，而精度为3。知道吗？我以为可能是 Fortran 编译器，但我认为 numpy 不使用 Fortran。
-
Scipy 失败似乎是在 OSX 上使用错误（= ABI 与 Veclib 不兼容）Fortran 编译器所导致的典型结果。任何 Numpy 失败都可能与这些无关——如果没有看到它们就很难说。您可能会发现这些有用：projects.scipy.org/scipy/ticket/1476projects.scipy.org/scipy/ticket/1496
标签： numpy python-3.x scipy macports