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copied!<p>On first thought you might try using the unix find and sed commands. However, doing so would require strong knowledge of regex and likely would end up being a lot more than a simple one-liner. Due to the fact that you are not simply replacing one known string and need to avoid replacing spaces outside of the filenames I would recommend to do this by writing a script using an xml parser.</p> <p>Here's the basic outline of what you would need to do if you were to write such a script in Python:</p> <p>1) Import the <a href="http://docs.python.org/2/library/os.html" rel="nofollow">OS</a> and <a href="http://docs.python.org/2/library/xml.etree.elementtree.html" rel="nofollow">ElementTree lib</a>: <code>import os</code> and <code>from optparse import OptionParser import xml.etree.ElementTree as ET</code><br> 2) Get the list of HTML files you would like to modify using Python's "<a href="http://docs.python.org/2/library/os.html" rel="nofollow">listdir</a>" or "<a href="http://docs.python.org/2/library/glob.html" rel="nofollow">glob</a>". 3) For each file get all <code>img</code> or <code>a</code> tags depending on which tags contain the <code>href</code> attributes which need to be changed. For example, you can get all <code>img</code> tags in a file like this:</p> <pre><code>file = ET.parse(filename) doc = file.getroot() imgs = doc.findall('.//img') </code></pre> <p>4) And finally, for each <code>img</code> or <code>a</code> tag, replace all spaces with underscores in the tags <code>href</code> attribute.</p> <p>I hope this helps. Let me know if I've misunderstood your question. Additionally, it might be possible to solve this using the tool you mentioned or a similar one, although I find it unlikely and it will likely require a fair amount of regex.</p>

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