pythonで菱形を印刷する

タイトル:下記の図案(菱形)を印刷する:

'''
        *

      * * *

    * * * * *

  * * * * * * *

* * * * * * * * *

  * * * * * * *

    * * * * *

      * * *

        *
'''
num = 1
while num <= 18:
    if num in list(range(1,18,2)):
        if num >= 11:
            col = 1
            while col <= (18-num):
                if col == 1:
                    print(" " * (num - 9), end='')
                print('*', end=' ')
                col += 1
            print('
')
            num += 1


        else:
            col = 1
            while col <= num:
                if col == 1:
                    print(" "*(9 - num), end='')
                print('*', end=' ')
                col += 1
            print('
')
            num += 1

    else:
        continue
    num += 1