Self-Modifying Quine

intentional_expanding_quine.py

def f(x,s):
    start =    44
    a =     0
    print(a)
    if x==1:
        start = int(s[24:29])
        s = list(s[:24]) + list('{:>5d}'.format(start+11)) + list(s[29:start]) + list('    a += 1\n') + list(s[start:])
        s = ''.join(s)
    return s

s = "def f(x,s):\n"\
    "    start =    44\n"\
    "    a =     0\n"\
    "    print(a)\n"\
    "    if x==1:\n"\
    "        start = int(s[24:29])\n"\
    "        s = list(s[:24]) + list('{:>5d}'.format(start+11)) + list(s[29:start]) + list('    a += 1\\n') + list(s[start:])\n"\
    "        s = ''.join(s)\n"\
    "    return s"

for x in [1,1,1,1,1,1,1,1,1]:
    s = f(x,s)
    print(s)
    exec(s)

intentional_quine.py

def f(x,s):
    a =     0
    print(a)
    if x==1:
      s = list(s)
      s[20:25] = list('{:>5d}'.format(int(''.join(s[20:25]))+1))
      s = ''.join(s)
    return s

s = 'def f(x,s):\n'\
    '    a =     0\n'\
    '    print(a)\n'\
    '    if x==1:\n'\
    '        s = list(s)\n'\
    "        s[20:25] = list('{:>5d}'.format(int(''.join(s[20:25]))+1))\n"\
    "    s = ''.join(s)\n"\
    "    return s\n"

for x in [1,1,0,0]:
    s = f(x,s)
    print(s)
    exec(s)