pathlib

https://medium.com/@ageitgey/python-3-quick-tip-the-easy-way-to-deal-with-file-paths-on-windows-mac-and-linux-11a072b58d5f

- system dependent raw path

Windows filenames:
C:\some_folder\some_file.txt

Most other operating systems:
/some_folder/some_file.txt

- pathlib rise

from pathlib import Path

data_folder = Path("source_data/text_files/")
file_to_open = data_folder / "raw_data.txt"

print(file_to_open.read_text())

filename = Path("source_data/text_files/raw_data.txt")

print(filename.name)
# prints "raw_data.txt"

print(filename.suffix)
# prints "txt"

print(filename.stem)
# prints "raw_data"

if not filename.exists():
    print("Oops, file doesn't exist!")
else:
    print("Yay, the file exists!")