Python functions to find union of multiple coordinates and intersection of multiple coordinates

py-coordinateOperations

def tileCoords(coords):
	formatCoords = []
	for coord in coords:
		coord = [int(coord[0]),int(coord[1])]

		formatCoords.append(('s',min(coord)))
		formatCoords.append(('e',max(coord)))

	formatCoords.sort(key = lambda x : x[0], reverse = True)
	formatCoords.sort(key = lambda x : x[1])

	count = 0
	posA = 0
	out = []
	for pos in formatCoords:
		if count == 0:
			posA = pos[1]
		if pos[0] == 's':
			count += 1
		if pos[0] == 'e':
			count -=1

		if count == 0:
			out.append((posA, pos[1]))

	return out

def intersectCoords(coords):
	formatCoords = []
	for coord in coords:
		coord = [int(coord[0]),int(coord[1])]

		formatCoords.append(('s',min(coord)))
		formatCoords.append(('e',max(coord)))

	formatCoords.sort(key = lambda x : x[0], reverse = True)
	formatCoords.sort(key = lambda x : x[1])
	
	count = 0
	posA = 0

	level = 1
	out = []
	for pos in formatCoords:
		if pos[0] == 's':
			count = 1
			level += 1
			posA = pos[1]
		if pos[0] == 'e':
			level -=1
			count -=1

		if count == 0:
			out.append((posA, pos[1], level))

	return out
	
	tileCoords([[5,20],[10,40]]) #output [5,40]
	intersectCoords([[5,20],[10,40]]) #output [10,20],2, 10,20 is where the intersection occurs, and there are 2 pairs that overlap