abc8cf09aa
* moving in test, misc, code, io directories and py/__init__.py * py/bin/_find.py does not print to stderr anymore * a few fixes to conftest files in other dirs some more fixes and adjustments pending --HG-- branch : trunk
46 lines
883 B
Plaintext
46 lines
883 B
Plaintext
=======
|
|
py.io
|
|
=======
|
|
|
|
.. contents::
|
|
.. sectnum::
|
|
|
|
The 'py' lib provides helper classes for capturing IO during
|
|
execution of a program.
|
|
|
|
IO Capturing examples
|
|
===============================================
|
|
|
|
:api:`py.io.StdCapture`
|
|
---------------------------
|
|
|
|
Basic Example:
|
|
|
|
>>> import py
|
|
>>> capture = py.io.StdCapture()
|
|
>>> print "hello"
|
|
>>> out,err = capture.reset()
|
|
>>> out.strip() == "hello"
|
|
True
|
|
|
|
For calling functions you may use a shortcut:
|
|
|
|
>>> import py
|
|
>>> def f(): print "hello"
|
|
>>> res, out, err = py.io.StdCapture.call(f)
|
|
>>> out.strip() == "hello"
|
|
True
|
|
|
|
:api:`py.io.StdCaptureFD`
|
|
---------------------------
|
|
|
|
If you also want to capture writes to the stdout/stderr
|
|
filedescriptors you may invoke:
|
|
|
|
>>> import py, sys
|
|
>>> capture = py.io.StdCaptureFD()
|
|
>>> sys.stderr.write("world")
|
|
>>> out,err = capture.reset()
|
|
>>> err
|
|
'world'
|