for i in range(0, 7):

    for j in range(0, i + 1):

        print('*', end = '')

    print()

 

print()

 

for i in range(0, 7):

    for j in range(0, 6 - i):

        print(' ', end = '')

    for k in range(0, i + 1):

        print('*', end = '')

    print()

 

print()

 

for i in range(0, 7):

    for j in range(0, i):

        print(' ', end = '')

    for k in range(0, 7 - i):

        print('*', end = '')

    print()

 

print()

 

for i in range(0, 5):

    for j in range(0, 4 - i):

        print(' ', end = '')

    for k in range(0, 1 + i * 2):

        print('*', end = '')

    print()

 

print()

 

for i in range(0, 5):

    for j in range(0, i):

        print(' ', end = '')

    for k in range(0, 9 - i * 2):

        print('*', end = '')

    print()

 

결과

 

*

**

***

****

*****

******

*******

 

      *

     **

    ***

   ****

  *****

 ******

*******

 

*******

 ******

  *****

   ****

    ***

     **

      *

 

    *

   ***

  *****

 *******

*********

 

*********

 *******

  *****

   ***

    *