def food$\_$search$($foods$,$ origin, max$\_$cals, is$\_$veg$)$:

$"""$

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

Searches for Food objects that fit certain conditions.

foods is unchanged.

Use: results $=$ food$\_$search$($foods$,$ origin, max$\_$cals, is$\_$veg$)$

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

Parameters:

foods $-$ a list of Food objects $($list of Food$)$

origin $-$ the origin of the food; if $-1,$ accept any origin $($int$)$

max$\_$cals $-$ the maximum calories for the food; if $0,$ accept any calories value $($int$)$

is$\_$veg $-$ whether the food is vegetarian or not; if False accept any food $($boolean$)$

Returns:

result $-$ a list of foods that fit the conditions $($list of Food$)$

foods parameter must be unchanged

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

$"""$