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<HTML><HEAD><TITLE>Implementation</TITLE></HEAD><BODY bgcolor="#FFFFFF"> <a href="../index.html" target="_top"><img src="../icons/usins.gif" alt="Logo" align=right></a><b>Data Structures and Algorithms with Object-Oriented Design Patterns in Python</b><br><A NAME="tex2html5372" HREF="page364.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html5370" HREF="page361.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html5364" HREF="page362.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html5374" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <BR><HR><H2><A NAME="SECTION0011320000000000000000">Implementation</A></H2><P>This section presents an implementation of leftist heapsthat is based on the binary tree implementationdescribed in Section&nbsp;<A HREF="page287.html#sectreesbintreeimp"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>.Program&nbsp;<A HREF="page363.html#progleftistHeapa"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A> introduces the <tt>LeftistHeap</tt> class.The <tt>LeftistHeap</tt> class extends the<tt>BinaryTree</tt> class introduced in Program&nbsp;<A HREF="page287.html#progbinaryTreea"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>and the abstract <tt>MergeablePriorityQueue</tt> classdefined in Program&nbsp;<A HREF="page352.html#progmergeablePriorityQueuea"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>.<P><P><A NAME="25607">&#160;</A><A NAME="progleftistHeapa">&#160;</A> <IMG WIDTH=575 HEIGHT=237 ALIGN=BOTTOM ALT="program25510" SRC="img1431.gif"  ><BR><STRONG>Program:</STRONG> <tt>LeftistHeap</tt> class <tt>__init__</tt> method.<BR><P><BR> <HR><UL> <LI> <A NAME="tex2html5375" HREF="page364.html#SECTION0011321000000000000000">Instance Attributes</A></UL><HR><A NAME="tex2html5372" HREF="page364.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html5370" HREF="page361.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html5364" HREF="page362.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html5374" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <P><ADDRESS><img src="../icons/bruno.gif" alt="Bruno" align=right><a href="../copyright.html">Copyright &#169; 2003</a> by <a href="../signature.html">Bruno R. Preiss, P.Eng.</a>  All rights reserved.</ADDRESS></BODY></HTML>

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