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<h3>
<tt cLASS="monofont">jpythonc</tt>
</h3>
<p>The JPython distribution provides a tool called <TT CLass="monofont">jpythonc</tT> that works like a Python compiler for Java. This tool, which is actually just a JPython script, operates by taking a JPython source code (extension <TT Class="monofont">.py</tt>), and compiling it to real Java class bytecodes, which are executed by the <i>Java Runtime Environment (JRE).</i> Therefore you can write your code in JPython, and later use <tt class="monofont">jpythonc</tt> to generate a simple class, a JavaBean, a servlet, or an applet. Note that you need full access to a Java compiler in order to use <tt cLasS="monofont">jpythonc.</tt> Internally, the <tT clasS="monofont">jpythonc</tt> tool creates a Java source file file, but it needs an external compiler to generate the compiled Java <tT CLAss="monofont">.class</tt> file.</P>
<P>Check the installation directory where you installed the JPython package. That's where the tool is located.</P>
<P>The <tt clASS="monofont">jpythonc</Tt> tool is very useful for embedding your JPython application in a Java application. After you generate the <tt cLASS="monofont">.class</tt> file, you are able to subclass Python classes in Java, and also to create JavaBeans, Servlets, and Applets from a Python class file.</p>
<p>The <tt class="monofont">jpythonc</tt> script accepts several command line options, as listed next. The general format of the command's syntax is as follows:</p>
<pre>
jpythonc [options] [module]*
</pre>
<P>The available options are listed as follows. Note that the information provided between parenthesis shows a short way to say the same thing that the long name's <a nAme="idx1073750732"></a>option says.</P>
<blocKquoTE>
<P><P><tt clASS="monofont">--package package (-p package)</Tt>棤
Puts all compiled code into the named Java package.</p>
</p>
<p><P><TT Class="monofont">--jar jarfile (-j jarfile)</TT>棤
Specifies a <TT class="monofont">.jar</tt> file to create and put the results of the freeze into. This option implies the <tt class="monofont">--deep</tt> option.</p>
</p>
<p><p><Tt cLass="monofont">--deep (-d)</Tt>棤
Compiles all Python dependencies of the module. This is used for creating applets.</p>
</p>
<p><P><tt cLASS="monofont">--core (-c)</tt>棤
Includes the core JPython libraries (about 130K). Needed for applets because Netscape doesn't yet support multiple archives. This option implies the <tt CLASs="monofont">--deep</tt> option.</p>
</P>
<P><P><Tt claSS="monofont">--all (-a)</TT>棤
Includes all the JPython libraries (everything in core + compiler and parser). This option implies the <tt class="monofont">--</tt>deep option.</p>
</p>
<p><p><tt class="monofont">--bean jarfile (-b jarfile)</Tt>棤
Compiles into <tT claSs="monofont">jarfile,</tt> including the correct manifest for the bean.</p>
</P>
<p><p><tT CLAss="monofont">--addpackages pkgs (-A pkgs)</tt>棤
Includes Java dependencies from this list of packages. Default is <TT CLass="monofont">org.python.modules</tT> and <TT Class="monofont">com.oroinc.text.regex.</TT>
</P>
</P>
<p><p><tt class="monofont">--workdir directory (-w directory)</tt>棤
Specifies the working directory where the generated Java source code is placed. The default value is <tt class="monofont">./jpywork.</tt>
</P>
</p>
<p><P><tt cLass="monofont">--skip modules (-s modules)</tT>棤
Doesn't include any of these modules in compilation. This is a comma-separated list of modules.</p>
</p>
<p><P><TT Class="monofont">--compiler path (-C path)</TT>棤
Uses a compiler different from <TT clasS="monofont">javac.</TT> If this is set to <Tt claSS="monofont">NONE,</TT> compiles end with the generation of the Java source file. Alternatively, you can set the property <tt class="monofont">python.jpythonc.compiler</tt> in the registry file.<a name="idx1073750733"></a>
<a name="idx1073750734"></A>
<a nAme="idx1073750735"></a>
<A name="idx1073750736"></A>
<a naME="idx1073750737"></A>
<A name="idx1073750738"></A>
</P>
</P>
<P><p><tt cLASS="monofont">--compileropts options-- (-J options)</tt>棤
Passes options directly to the Java compiler. Alternatively, you can set the property <tt CLASs="monofont">python.jpythonc.compileropts</tt> in the registry file.</p>
</p>
<p><p><tt class="monofont">--falsenames names (-f names)</tt>棤
A comma-separated list of names that are always false. Can be used to short-circuit if clauses.</p>
</p>
<p><p><Tt cLass="monofont">--help (-h)</Tt>棤
Prints a usage message and exits.</p>
</p>
<p><P><tt cLASS="monofont">[module]*</tt>棤
A list of Python modules to freeze. Can be either module names that are located on the <tt CLASs="monofont">python.path</tt> or <tT CLAss="monofont">.py</tt> files.<A NAMe="idx1073750739"></a>
</p>
</p>
</blockquote>
<p>In order to <a name="idx1073750740"></A>
<a nAme="idx1073750741"></a>
<A name="idx1073750742"></A>create an applet, the following syntax is suggested. Note that you need to use the <tt cLASS="monofont">-core</tt> option in order to include the JPython libraries as part of the applet.</p>
<pRE>
jpythonc -core -deep -jar <appletapp.jar> *.py
</PRe>
<p>In order to <a nAME="idx1073750743"></A>
<a namE="idx1073750744"></A>
<A Name="idx1073750745"></a>create a simple class, the following syntax is suggested:</p>
<pre>
jpythonc <yourapp.py>
</pre>
<p>Now, if you just need to <a name="idx1073750746"></a>
<a nAme="idx1073750747"></A>
<a naMe="idx1073750748"></a>create a bean, the following syntax should be used:</p>
<pRe>
jpythonc -deep -bean <filename.jar> <beenname>
</prE>
</FONt>
<P><TABLE width="100%" border=0><TR valign="top"><TD><font size=1 color="#C0C0C0"><br></font></TD><TD align=right><font size=1 color="#C0C0C0">Last updated on 1/30/2002<br>Python Developer's Handbook, © 2002 Sams Publishing</font></TD></TR></TABLE></P>
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</TD></TR></TABLE>
<br><TABLE width=100% bgcolor=white border=0 cellspacing=0 cellpadding=5><TR><TD><H4 class=Title>Index terms contained in this section</H4>
<font size=2>
applets<BR>
<a href="#idx1073750741">creating</a><BR>
beans<BR>
<a href="#idx1073750747">creating</a><BR>
classes<BR>
<a href="#idx1073750744">creating</a><BR>
creating<BR>
<a href="#idx1073750740">applets</a><BR>
<a href="#idx1073750746">beans</a><BR>
<a href="#idx1073750743">classes</a><BR>
JPython<BR>
<a href="#idx1073750733">jpythonc tool</a><BR>
<a href="#idx1073750735">jpythonc tool</a><BR>
options<BR>
<a href="#idx1073750732">jpythonc tool</a> <a href="#idx1073750738">2nd</a> <a href="#idx1073750739">3rd</a><BR>
programming languages<BR>
JPython<BR>
<a href="#idx1073750734">jpythonc tool</a><BR>
tools<BR>
<a href="#idx1073750736">jpythonc</a><BR>
utilities<BR>
<a href="#idx1073750737">jpythonc</a><BR>
writing<BR>
<a href="#idx1073750742">applets</a><BR>
<a href="#idx1073750748">beans</a><BR>
<a href="#idx1073750745">classes</a><BR>
<BR>
</font></TD></TR></TABLE>
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