Python 图案打印--等腰三角形

 layer = int(input("请输入要打印的层数："))

 for i in range(1, layer + 1):
 	# 计算出空格的个数
 	space_num = layer - i
 	for j in range(0, space_num):
 		print(" ", end="")

 	# 计算*的个数
 	star_num = 2 * i  - 1
 	for j in range(0, star_num):
 		print("*", end="")

 	print("")