Returns 1 if the unit is in your party group, nil otherwise.

isTrue = UnitPlayerOrPetInParty("unit")

Parameters

Arguments

"unit" 

String - unitId who should be checked

Returns

isTrue 

1 or nil

Note: returns nil for player and pet as of 3.0.2

Example

local TargetInParty = UnitPlayerOrPetInParty("target")

Result

TargetInParty = 1   - If your target is in your party
TargetInParty = nil - If your target is not in party