close(), closes the file, print(open("demofile.txt", "r").read()), returns the file content, print(open("demofile.txt", "r").readline()), returns one line from the file, print(open("demofile.txt", "r").readlines(33)), returns a list of lines from the file, open("demofile2.txt", "a").write("See you soon!"), writes the specified string to the file, open("demofile3.txt", "a").writelines(["See you soon!", "Over and out."]), writes a list of strings to the file.

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