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<?xml version="1.0"?>
<!--
###################################################
##Probe Function
###################################################
-->
<block>
<name>Probe Function</name>
<key>probe_function</key>
<import>from grc_gnuradio import blks2 as grc_blks2</import>
<make>grc_blks2.probe_function(
probe_callback=self.$(block_id.eval).$(function_name.eval),
probe_rate=$probe_rate,
)</make>
<callback>set_probe_rate($probe_rate)</callback>
<param>
<name>Block ID</name>
<key>block_id</key>
<value>my_block_0</value>
<type>string</type>
</param>
<param>
<name>Function Name</name>
<key>function_name</key>
<value>get_number</value>
<type>string</type>
</param>
<param>
<name>Probe Rate</name>
<key>probe_rate</key>
<value>10</value>
<type>real</type>
</param>
<source>
<name>out</name>
<type>float</type>
</source>
<doc>
Polls a function of an arbitrary block and writes the value to the output port. \
The block id is the id of another block in the flow graph. \
The function name is the name of a function in the said block. \
The function should take no arguments and return a floating point or integer number.
</doc>
</block>
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