檔案或文件夾是否存在

from pathlib import Path

my_file = Path("/path/to/file")
if my_file.is_file():
    # file exists
if my_file.is_dir():
    # directory exists
if my_file.exists():
    # path exists
try:
    my_abs_path = my_file.resolve(strict=True)
except FileNotFoundError:
    # doesn't exist
else:
    # exists