为什么我不能使用scipy.io？ [英] Why can't I use the scipy.io?

问题描述

我一直在努力开始使用scipy，但是这个包给了我一些问题。该教程严重依赖于scipy.io，但是当我导入scypi并尝试使用scipy.io时，我收到错误：

I've been trying to get started with scipy, but the package is giving me some problems. The tutorial leans heavily on scipy.io, but when I import scypi and try to use scipy.io, I get errors:

In [1]: import scipy

In [2]: help(scipy.io)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/home/chris/dev/scipy/<ipython-input-2-ef060398b31c> in <module>()
----> 1 help(scipy.io)

AttributeError: 'module' object has no attribute 'io'

我运行了系统更新，然后我卸载了scipy，然后重新安装了它。

I've run system updates and I uninstalled scipy then installed it again.

有趣的是，我可以这样导入模块：

Interestingly enough, I can import the module this way:

In [1]: import scipy.io

但是当我尝试使用它时，一旦我使用方法，我就会收到错误：

But then when I try to use it, I get an error as soon as I use a method:

In [2]: arr = scipy.array([[1.0,2.0],[3.0,4.0],[5.0,6.0]])
In [3]: outFile = file('tmpdata1.txt', 'w')
In [4]: scipy.io.write_array(outFile, arr)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/home/chris/dev/scipy/<ipython-input-4-46d22e4ff485> in <module>()
----> 1 scipy.io.write_array(outFile, arr)

AttributeError: 'module' object has no attribute 'write_array'

我确定我遗漏了令人尴尬的基本内容，但我无法在Google或stackoverflow档案中找到这个问题的答案。

I'm sure I'm missing something embarrassingly basic, but I've not been able to find an answer to this problem on Google or in the stackoverflow archives.

推荐答案

这里有两件事。首先，通过执行 import package 然后尝试访问 package.module ，通常无法访问包中的模块。你经常要做你做的， import package.module ，或者（如果你不想输入 package.module 所有时间，你可以从包导入模块做。所以你也可以从scipy import io 。

Two things here. First, you cannot in general access a module in a package by doing import package and then trying to access package.module. You often have to do what you did, import package.module, or (if you don't want to type package.module all the time, you can do from package import module. So you can also do from scipy import io.

其次， scipy.io 模块不提供 write_array function。它看起来可能已经习惯了，但是他们摆脱了它。你可能正在看一个过时的教程。（你用的是什么教程？）谷歌搜索，似乎他们建议使用numpy的 savetxt 而不是函数，所以你可能想看一下。

Second, the scipy.io module does not provide a write_array function. It looks like maybe it used to, but they got rid of it. You may be looking at an outdated tutorial. (What tutorial are you using?) Googling around, it seems they suggest to use numpy's savetxt function instead, so you might want to look into that.

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