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Python · Function

open

open() opens a path or file descriptor and returns a file object. Its mode chooses reading, writing, appending, text, binary, or update behavior.

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Syntax

open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None)

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  • io
  • os
  • os.path
  • tempfile
  • shutil
  • read
  • write

Source: Built-in functions — Python 3.15.2 documentation. Checked 2026-11-03.