Python 3 Quick Tip: The easy way to deal with file paths on Windows, Mac and Linux - smart1004/doc GitHub Wiki
from pathlib import Path
data_folder = Path("source_data/text_files/")
file_to_open = data_folder / "raw_data.txt"
f = open(file_to_open)
print(f.read())
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https://wikidocs.net/3716