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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>The Last Axiom</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="tex2html1755" HREF="page49.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html1753" HREF="page37.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html1749" HREF="page47.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html1757" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <BR><HR><H2><A NAME="SECTION0021100000000000000000">The Last Axiom</A></H2><P>In this section we state the last axiom needed for the detailedmodel of the Python virtual machine.This axiom addresses the time required to create a new object instanceof a class:<P><BLOCKQUOTE> <b>Axiom</b><A NAME="axiomvi">&#160;</A>The time required to create a new object instance of a classis a constant,  <IMG WIDTH=29 HEIGHT=14 ALIGN=MIDDLE ALT="tex2html_wrap_inline58033" SRC="img126.gif"  >.This time does not include any time taken to initialize the object.</BLOCKQUOTE><P>By applying Axioms&nbsp;<A HREF="page38.html#axiomi"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>, <A HREF="page38.html#axiomiii"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>, <A HREF="page38.html#axiomiv"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A> and&nbsp;<A HREF="page48.html#axiomvi"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>,we can determine that the running time of the statement<PRE>i = IntType(0)</PRE>is  <IMG WIDTH=324 HEIGHT=24 ALIGN=MIDDLE ALT="tex2html_wrap_inline58035" SRC="img127.gif"  >,where  <IMG WIDTH=112 HEIGHT=24 ALIGN=MIDDLE ALT="tex2html_wrap_inline58037" SRC="img128.gif"  > is the running timeof the <tt>__init__</tt> method of the class <tt>IntType</tt>.<P><HR><A NAME="tex2html1755" HREF="page49.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html1753" HREF="page37.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html1749" HREF="page47.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html1757" 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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