小编Mil*_*d M的帖子

当我跑:

sudo pip install ipython

我收到以下错误

OSError:[Errno:1]不允许操作:'/System/Library/Frameworks/Python.framework/Versions/2.7/share'

执行的最后一个命令尝试创建上面给出的目录.

此外,以下命令无法在不提供任何错误的情况下安装iPython.

sudo pip install --user python

(我在Mac OS X El Capitan上,以防此操作系统上的其他人看到同样的问题.)

我想使用 cross_val_score 来验证我的 OneClassSVM 训练集。这样做会导致以下错误消息。

难道是因为OneClassSVM是无监督算法，没有“y”向量传递给cross_val_score，所以算法失败了？

clf = svm.OneClassSVM(nu=_nu, kernel=_kernel, gamma=_gamma, random_state=_random_state, cache_size=_cache_size)
scores = cross_val_score(estimator=clf, X=X_scaled, scoring='accuracy', cv=5)

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PS：我意识到“y”向量在cross_val_score中是可选的。但这个错误仍然让我假设“y”向量导致了错误。

File "/usr/local/lib/python2.7/site-packages/sklearn/model_selection/_validation.py", line 140, in cross_val_score
    for train, test in cv_iter)
  File "/usr/local/lib/python2.7/site-packages/sklearn/externals/joblib/parallel.py", line 758, in __call__
    while self.dispatch_one_batch(iterator):
  File "/usr/local/lib/python2.7/site-packages/sklearn/externals/joblib/parallel.py", line 608, in dispatch_one_batch
    self._dispatch(tasks)
  File "/usr/local/lib/python2.7/site-packages/sklearn/externals/joblib/parallel.py", line 571, in _dispatch
    job = self._backend.apply_async(batch, callback=cb)
  File "/usr/local/lib/python2.7/site-packages/sklearn/externals/joblib/_parallel_backends.py", line 109, in apply_async
    result = ImmediateResult(func)
  File "/usr/local/lib/python2.7/site-packages/sklearn/externals/joblib/_parallel_backends.py", line 326, in __init__
    self.results = batch()
  File "/usr/local/lib/python2.7/site-packages/sklearn/externals/joblib/parallel.py", line 131, in __call__ …