def check_list(List, CheckValue):
	Result = True
	# Loop
	for Item in List:
		# Check
		if not Item == CheckValue:
			Result = False
	return Result

#
# Example
#

ListA	= [1.0, 0.0, 0.0]
CheckA	= 0.0

print(check_list(ListA, CheckA))
# False

ListB	= [0.0, 0.0, 0.0]
CheckB	= 0.0

print(check_list(ListB, CheckB))
# True