def exclusive_in(in_list,master_list):
	"""
	Checks if every element in in_list is in masterlist

	:in_list: (list of any type of object) elements
	:master_list: (list of any type of object) elements

	:returns: (bool) True if every element in in_list is in master_list and
				False otherwise
	"""
	if in_list==[]:
		return True
	else:
		for elem in in_list:
			if elem not in master_list:
				return False
		return True