8.15.1 Popen3 Objects
Instances of the Popen3 class have the following methods:
- poll ()
-
Returns -1 if 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.
