def even$\_$avg$($values$)$:

$"""$

$-------------------------------------------------------$

Returns the average $($integer$,$ rounded down$)$ of all even numbers

in values. If values has no even numbers, the average is $0.$

Use: ea $=$ even$\_$avg$($values$)$

$-------------------------------------------------------$

Parameters:

values $-$ a list of values $($list of int$)$

Returns$$:

ea $-$ the average of the even numbers in values $($int$)$

$-------------------------------------------------------$

$"""$