金字塔python打印

Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> str=input()
I
>>> number=ord(str)
>>> i=65
>>> while i<=number:
    for j in range(0,code-i):
        print(" ",end"")
        
SyntaxError: invalid syntax
>>> str=input()
I
>>> number=ord(str)
>>> i=65
>>> while j<=number:
    for j in range(0,code-i):
        print(" ",end="")
    for s in range(i,64,-1):
        print(chr(s),end="")
    for k in range(66,i+1):
        print(chr(k),end="")
    i+=1
    print("\n")

    
Traceback (most recent call last):
  File "", line 1, in
    while j<=number:
NameError: name 'j' is not defined
>>> str=input()
I
>>> number=ord(str)
>>> i=65
>>> while i<=number:
    for j in range(0,code-i):
        print(" ",end="")
    for s in range(i,64,-1):
        print(chr(s),end="")
    for k in range(66,i+1):
        print(chr(k),end="")
    i+=1
    print("\n")

    
Traceback (most recent call last):
  File "", line 2, in
    for j in range(0,code-i):
NameError: name 'code' is not defined
>>> str=input()
I
>>> number=ord(str)
>>> i=65
>>> while i<=number:
    for j in range(0,number-i):
        print(" ",end="")
    for s in range(i,64,-1):
        print(chr(s),end="")
    for k in range(66,i+1):
        print(chr(k),end="")
    i+=1
    print("\n")

    
        A

       BAB

      CBABC

     DCBABCD

    EDCBABCDE

   FEDCBABCDEF

  GFEDCBABCDEFG

 HGFEDCBABCDEFGH

IHGFEDCBABCDEFGHI

>>>