Question

我正在尝试使用以下页面中的示例学习scikit：

http://scikit-learn.org/stable/auto_examples/neighbors/plot_kde_1d.html#example-neighbors-plot-kde-1d-py

我的机器上安装了Python2.7和3.2（Ubuntu 12.04）。当我在2.7中尝试以下行时，

from sklearn.neighbors import KernelDensity

我收到以下错误：

Python 2.7.3 (default, Feb 27 2014, 20:00:17) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sklearn.neighbors import KernelDensity
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name KernelDensity

当我在3.2中运行它时，我收到以下错误：

Python 3.2.3 (default, Feb 27 2014, 21:33:50) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sklearn.neighbors import KernelDensity
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.2/dist-packages/sklearn/neighbors/__init__.py", line 6, in <module>
    from .ball_tree import BallTree
  File "numpy.pxd", line 155, in init sklearn.neighbors.ball_tree (sklearn/neighbors/ball_tree.c:34290)
ValueError: numpy.dtype has the wrong size, try recompiling

我的版本是：

>>> import sklearn
>>> sklearn.__version__
'0.15-git'

我还运行了以下内容：

sudo -E pip install -U scikit-learn

然后它返回：

Requirement already up-to-date: scikit-learn in /usr/local/lib/python3.2/dist-packages
Cleaning up...

我最近一直在学习python，随着我在理解语言方面取得进步，我开始学习`sklearn'但是由于这个错误，我被困住了。我该如何解决？

在尝试不同的选项时，我还升级了numpy（到版本1.8.1），并在卸载并重新安装scikit-learn之后使用pip建议，我收到以下错误：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.2/dist-packages/sklearn/__init__.py", line 38, in <module>
    from .base import clone
  File "/usr/local/lib/python3.2/dist-packages/sklearn/base.py", line 10, in <module>
    from scipy import sparse
  File "/usr/lib/python3/dist-packages/scipy/__init__.py", line 124, in <module>
    pkgload(verbose=SCIPY_IMPORT_VERBOSE,postpone=True)
  File "/usr/local/lib/python3.2/dist-packages/numpy/_import_tools.py", line 177, in __call__
    for package_name in self._get_sorted_names():
  File "/usr/local/lib/python3.2/dist-packages/numpy/_import_tools.py", line 114, in _get_sorted_names
    for name in depend_dict.keys():
RuntimeError: dictionary changed size during iteration

在Python2.7和3.2中导入KernelDensity

0 个答案: