Shift leading number for sql migration files

shift.py

from pathlib import Path


start = 3
gap = 1

for p in sorted(Path().glob("*.sql"), key=lambda p: p.name, reverse=True):
    s = p.name.split("_", maxsplit=1)
    num = int(s[0])
    name = s[1]
    if num < start:
        continue
    else: 
        num = num + gap
    new_name = f"{str(num).zfill(4)}_{name}"
    print(f"{p.name} -> {new_name}")
    p.rename(new_name)