Replacing one character of a string in python
<p>In python, are strings mutable?  The line <code>someString[3] = "a"</code> throws the error </p>

<blockquote>
  <p>TypeError: 'str' object does not
  support item assignment</p>
</blockquote>

<p>I can see why (as I could have written someString[3] = "test" and that would obviously be illegal) but is there a method to do this in python?</p>
