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Viewing changes to exercises/sample/fib.xml

Added module ivle.config, which takes care of some work interfacing with
    configobj, including searching for the file and opening the object.
ivle.conf.conf now uses this instead of having its own search.

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exercises/sample/fib.xml
 
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<exercise name = "Fibonacci numbers">
 
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    <desc>Write a function <code>fib(n)</code> which returns the nth fibonacci
 
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        number.</desc>
 
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    <partial>
 
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<![CDATA[
 
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def fib(n):
 
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  # Write your function here.
 
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]]>
 
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    </partial>
 
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    <solution>
 
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<![CDATA[
 
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def fib(n):
 
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  import numpy
 
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  return int((numpy.matrix([[0, 1], [1, 1]], dtype='object')**(n-1))[1,1])
 
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]]>
 
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    </solution>
 
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    <case name="Low n" function="fib">
 
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        <arg value="10" />
 
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        <function desc="Match">int</function>
 
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    </case>
 
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    <case name="First number" function="fib">
 
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        <arg value="1" />
 
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        <function desc="Match">int</function>
 
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    </case>
 
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    <case name="Zeroth number" function="fib">
 
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         <file name="patch.py">
 
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<![CDATA[
 
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fib_zero = 0 
 
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]]>
 
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        </file>
 
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        <arg value="0" />
 
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        <function desc="Match">int</function>
 
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    </case>
 
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    <case name="High number" function="fib">
 
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        <arg value="30" />
 
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        <function desc="Match">int</function>
 
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    </case>
 
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    <case name="Very high number" function="fib">
 
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        <arg value="1000" />
 
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        <function desc="Match">int</function>
 
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    </case>
 
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</exercise>
 
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