how to remove a specific element in the tuple?
<p>how to remove a specific element in the tuple?</p>

<p>for example:</p>

<pre><code>      L={('a','b','c','d'):1,('a','b','c','e'):2}

      remove='b'
</code></pre>

<p>I want to get a result of :</p>

<pre><code>     {('a','c','d'):1,('a','c','e'):2}
</code></pre>
