没有名为scipy.stats的模块-为什么尽管安装了scipy

Question

如何使用python和scipy得到一个poissio随机变量？哇...我安装了scipy，但在文档中我没有得到名为scipy.stats的模块？我在Ubuntu12.04。所以......去想想

http://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.poisson.html

ubuntu@ubuntu:~/Downloads$ sudo apt-get install python-scipy
Reading package lists... Done
Building dependency tree       
Reading state information... Done
python-scipy is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 482 not upgraded.
ubuntu@ubuntu:~/Downloads$ python
Python 2.7.3 (default, Apr 10 2013, 06:20:15) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from scipy.stats import poisson
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named scipy.stats

Answer 1

我觉得scipy是个好办法。您可能有一个简单的名称空间可见性问题。由于stats本身是一个模块，您首先需要导入它，然后可以使用scipy.stats中的函数

import scipy
import scipy.stats
#now you can use
scipy.stats.poisson
#if you want it more accessible you could do what you did above
from scipy.stats import poisson
#then call poisson directly
poisson