python打印菱形，要求使用str.center()

Sure, I can help you with that. Here's an example of how you can print a diamond shape using str.center() in Python:

n = int(input("Enter the number of rows for the diamond: "))
for i in range(1, n+1):
    print(' '*(n-i) + ('* ')*i)
for i in range(n-1, 0, -1):
    print(' '*(n-i) + ('* ')*i)

Just enter the number of rows you want for the diamond shape and it will be printed using stars (*) and spaces.