100万行のFizzBuzzコードをつくります。(f文字列があるのでPython 3.6以上を想定)

fizzbuzz.py

N = 1_000_000
s = f"N = {N}\nfor i in range(N):\n"
with open("FizzBuzz.py", mode='w') as f:
    f.write(s)

for i in range(1, N):
  if i == 1:
    s = f"\tif i == {i}:\n\t\tprint({i})\n"
  elif i % 15 == 0:
    s = f"\telif i == {i}:\n\t\tprint(\"FizzBuzz\")\n"
  elif i % 3 == 0:
    s = f"\telif i == {i}:\n\t\tprint(\"Fizz\")\n"
  elif i % 5 == 0:
    s = f"\telif i == {i}:\n\t\tprint(\"Buzz\")\n"
  else:
    s = f"\telif i == {i}:\n\t\tprint({i})\n"
  with open("FizzBuzz.py", mode='a') as f:
    f.write(s)