title: Are there any fundamental differences to use numpy.zeros or zeros?
body: <p>I have downloaded the python 2.6 and installed <code>numpy-1.6.1-win32-superpack-python2.6</code> and <code>scipy-0.9.0-win32-superpack-python2.6</code>.  It is running on a Window with window 2000 professional as OS.</p>
  <p>However, when I run python, with the following commands, following error message appear, could you mind to teach me how to solve it?</p>
  <pre><code>&gt;&gt;&gt; x = zeros([K], int32)
  
  Traceback (most recent call last):
  file &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;
  NameError: name 'zeros' is not defined.
  </code></pre>
  <p>I then tried to import <code>numpy</code>:</p>
  <pre><code>&gt;&gt;&gt; import numpy
  &gt;&gt;&gt; x=numpy.zeros([K], int32)
  Traceback (most recent call last):
  file &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;
  NameError: name 'K' is not defined.
  </code></pre>
  <p>Are there any fundamental differences to use <code>numpy.zeros</code> or <code>zeros</code>?  What is the difference between them?</p>
  <p>I also tried to readin a series of files (saved in the same directory) to get python doing analysis for me.  I learnt from the manual that I should use</p>
  <pre><code>f=open('C:/xxx.txt', 'w') # for single file
  </code></pre>
  <p>How to apply this to a series of files?</p>