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Diffstat (limited to 'Doc/library/subprocess.rst')
| -rw-r--r-- | Doc/library/subprocess.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst index 5ac32df..d260473 100644 --- a/Doc/library/subprocess.rst +++ b/Doc/library/subprocess.rst @@ -189,7 +189,12 @@ Instances of the :class:`Popen` class have the following methods: communicate() returns a tuple (stdout, stderr). - .. note:: + Note that if you want to send data to the process's stdin, you need to create + the Popen object with ``stdin=PIPE``. Similarly, to get anything other than + ``None`` in the result tuple, you need to give ``stdout=PIPE`` and/or + ``stderr=PIPE`` too. + +.. note:: The data read is buffered in memory, so do not use this method if the data size is large or unlimited. |