How do I create a incrementing filename in Python?

Question

I\'m creating a program that will create a file and save it to the directory with the filename sample.xml. Once the file is saved when i try to run the program again it over

Answer 1

My 2 cents: an always increasing, macOS-style incremental naming procedure

• get_increased_path("./some_new_dir").mkdir() creates ./some_new_dir ; then
• get_increased_path("./some_new_dir").mkdir() creates ./some_new_dir (1) ; then
• get_increased_path("./some_new_dir").mkdir() creates ./some_new_dir (2) ; etc.

---

If ./some_new_dir (2) exists but not ./some_new_dir (1), then get_increased_path("./some_new_dir").mkdir() creates ./some_new_dir (3) anyways, so that indexes always increase and you always know which is the latest

---

from pathlib import Path
import re

def get_increased_path(file_path):
    fp = Path(file_path).resolve()
    f = str(fp)

    vals = []
    for n in fp.parent.glob("{}*".format(fp.name)):
        ms = list(re.finditer(r"^{} \(\d+\)$".format(f), str(n)))
        if ms:
            m = list(re.finditer(r"\(\d+\)$", str(n)))[0].group()
            vals.append(int(m.replace("(", "").replace(")", "")))
    if vals:
        ext = " ({})".format(max(vals) + 1)
    elif fp.exists():
        ext = " (1)"
    else:
        ext = ""

    return fp.parent / (fp.name + ext + fp.suffix)