Python Library Reference

Next: 6.1.3 File Descriptor Operations Up: 6.1 os Previous: 6.1.1 Process Parameters

---

6.1.2 File Object Creation

These functions create new file objects.

fdopen (fd[, mode[, bufsize]])

Return an open file object connected to the file descriptor fd. The mode and bufsize arguments have the same meaning as the corresponding arguments to the built-in open() function. Availability: Macintosh, Unix, Windows.

popen (command[, mode[, bufsize]])

Open a pipe to or from command. The return value is an open file object connected to the pipe, which can be read or written depending on whether mode is 'r' (default) or 'w'. The bufsize argument has the same meaning as the corresponding argument to the built-in open() function. The exit status of the command (encoded in the format specified for wait()) is available as the return value of the close() method of the file object, except that when the exit status is zero (termination without errors), None is returned. Note: This function behaves unreliably under Windows due to the native implementation of popen(). Availability: Unix, Windows.

---

Python Library Reference

Next: 6.1.3 File Descriptor Operations Up: 6.1 os Previous: 6.1.1 Process Parameters