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📁 Data Structures And Algorithms With Object-Oriented Design Patterns In Python (2003) source code and

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<HTML><HEAD><TITLE>__init__ Method</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="tex2html7979" HREF="page595.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html7977" HREF="page591.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html7971" HREF="page593.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html7981" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <BR><HR><H2><A NAME="SECTION0017430000000000000000"><tt>__init__</tt> Method</A></H2><P>The <em><tt>__init__</tt> method</em><A NAME=57496>&#160;</A> of a class is special.The purpose of a <tt>__init__</tt> method is to <em>initialize</em> an object.The <tt>__init__</tt> method is invoked whenever a new instance of a class is created.The <tt>__init__</tt> method of the <tt>Complex</tt> classis defined in Program&nbsp;<A HREF="page593.html#progcomplexa"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>.<P>Consider the following statement:<PRE>i = Complex(0, 1)</PRE>The effect of this statement isequivalent to the following sequence of statements:<PRE>c = object.__new__(Complex)Complex.__init__(c, 0, 1)</PRE>The <tt>__new__</tt> method of the built-in <tt>object</tt> classis called to create a new object instance.Then <tt>__init__</tt> method of the <tt>Complex</tt> class is calledto initialize that instance.<P><HR><A NAME="tex2html7979" HREF="page595.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html7977" HREF="page591.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html7971" HREF="page593.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html7981" 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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