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<H2><A NAME="SECTION0001330000000000000000"></A><A NAME="PYCHART-OPTIONS"></A><a id='l2h-253' xml:id='l2h-253'></a>
<BR>
13.3 Changing the default behavior via environment variable PYCHART_OPTIONS
</H2>
<P>
The variables in the <tt class="module">theme</tt> module can also be set
via environment variable <code>PYCHART_OPTIONS</code>.
The value of this variable, if set, should be a
sequence of <code>var=val</code>, separated by space. For instance, the below
example tells PyChart to write to file <span class="file">foo.pdf</span> and use
Times-Roman as the default font.
<P>
<div class="verbatim"><pre>
% PYCHART_OPTIONS="output=foo.pdf font-family=Times"
% export PYCHART_OPTIONS
</pre></div>
<P>
The summary of attributes that can be set via <code>PYCHART_OPTIONS</code>
follows.
<P>
<DL>
<DT><STRONG>font-family=<var>name</var>:</STRONG></DT>
<DD><a id='l2h-254' xml:id='l2h-254'></a>family
Same as setting <code>theme.default_font_family</code> variable.
<P>
</DD>
<DT><STRONG>font-size=<var>size</var>:</STRONG></DT>
<DD><a id='l2h-255' xml:id='l2h-255'></a>size
Same as setting <code>theme.default_font_size</code> variable.
<P>
</DD>
<DT><STRONG>line-width=<var>points</var>:</STRONG></DT>
<DD>Same as setting <code>theme.default_line_width</code> variable.
<P>
</DD>
<DT><STRONG>scale=<var>n</var>:</STRONG></DT>
<DD><a id='l2h-256' xml:id='l2h-256'></a>
Same as setting <code>theme.scale_factor</code> variable.
<P>
</DD>
<DT><STRONG>color=[yes|no]:</STRONG></DT>
<DD><a id='l2h-257' xml:id='l2h-257'></a>
Same as setting <code>theme.use_color</code> variable.
<P>
</DD>
<DT><STRONG>debug-level=<var>N</var>:</STRONG></DT>
<DD>Same as setting <code>theme.debug_level</code> variable.
<P>
</DD>
<DT><STRONG>bbox=<var>LEFT</var>,<var>BOTTOM</var>,<var>RIGHT</var>,<var>TOP</var>:</STRONG></DT>
<DD><a id='l2h-258' xml:id='l2h-258'></a>
This option sets <code>theme.bounding_box</code> and/or
<code>theme.delta_bounding_box</code>.
The value of this option is a sequence of four values, separated by
commas. Each value is of the form, <code>+</code><var>num</var>, <code>-</code><var>num</var>,
or <var>num</var>. <code>+</code><var>num</var> and <code>-</code><var>num</var> adds to or subtracts
from the bounding-box value computed by PyChart (the unit is PostScript
points; See Section <A href="unit.html#unit">4</A>.) <var>num</var> sets the bounding box at that value. For
example,
<P>
<div class="verbatim"><pre>
bbox=-10,0,+10,100
</pre></div>
<P>
Extends the bounding box 10 points to both left and right, and sets the
vertical stretch from 0 to 100.
</DD>
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<span class="release-info">Documentation released on July 2, 2005.</span>
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