file.isatty() Is a tty
Last updated: 2026-09-22
file.isatty() Is a tty
file.isatty() returns whether the stream is connected to a tty device.
| Category | File Methods |
|---|---|
| Kind | Built-in Type Method |
| Python Version | all |
📝 Syntax
file.isatty()Returns：bool. True if the stream is connected to a tty device, else False.
Mutates the original：No (returns a new object)
▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
False💡 Related Cases
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❓ FAQ
QWhat does isatty() check?
AWhether the file stream is connected to a terminal (tty). It returns True when running on a terminal and False when output is redirected to a file or pipe.
QWhat is it useful for?
ADetecting whether the output is interactive, e.g. "colorize output on a terminal, output plain text when redirected".
QWhat does it return for a regular file?
AFalse.
