Python中使用for循环打印菱形，三角形，空心菱形等图形

三角形

def shape1():
for i in range(1, 5):
str1 = "*" * (i * 2 - 1)
print(str1.center(7))

if __name__ == "__main__":
shape1()

实心菱形

def shape2():
for i in range(1, 8):
if i < 4:
str2 = "*" * (i * 2 - 1)
else:
str2 = "*" * (15 - 2 * i)
print(str2.center(7))

if __name__ == "__main__":
shape2()

空心菱形

def shape3():
s = "*"
for i in range(1, 8):
if i == 1 or i == 7:
str1 = s.center(7)
elif i < 5:
str1 = s.rjust(5 - i)
str1 += s.rjust(2 * i - 2)
else:
str1 = s.rjust(i - 3)
str1 += s.rjust(14 - 2 * i)
print(str1)

if __name__ == "__main__":
shape3()

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