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Next: 8.19 commands Up: 8.18 popen2 Previous: 8.18 popen2
8.18.1 Popen3 Objects
Instances of the Popen3 class have the following methods:
- poll ()
- Returns
-1if child process hasn't completed yet, or its return code otherwise.
- wait ()
- Waits for and returns the return code of the child process.
The following attributes of Popen3 objects are also available:
- fromchild
- A file object that provides output from the child process.
- tochild
- A file object that provides input to the child process.
- childerr
- Where the standard error from the child process goes is capturestderr was true for the constructor, or
None.
- pid
- The process ID of the child process.
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