Python - WindowsError: [Error 2] The system cannot find the file specified
<p>I have a folder full of pdf files. I'm trying to remove all the spaces from files name and replace them with underscores. Here's what I have so far:</p>

<pre><code>import os, sys

folder = path to folder
FileList = os.listdir(folder)

for files in FileList:
    if ' ' in files:
        NewName = files.replace(" ", "_")
        os.rename(files, NewName)
</code></pre>

<p>When I run this script I get the following error:</p>

<pre><code>WindowsError: [Error 2] The system cannot find the file specified
</code></pre>

<p>I'm guessing there is a pretty simple fix, but I've look all over and cannot find a solution for the life of me.</p>

<p>Thanks for the help!</p>