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Merged revisions 73026,73313,73511,73554 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk ........ r73026 | r.david.murray | 2009-05-29 15:30:27 -0400 (Fri, 29 May 2009) | 3 lines Issue 6141: document that the first item of args is still the command name even when executable is specified. ........ r73313 | r.david.murray | 2009-06-08 20:44:22 -0400 (Mon, 08 Jun 2009) | 4 lines Issue 2947: document how return code handling translates from os.popen to subprocess. Also fixes reference link in the os.spawn documentation. ........ r73511 | r.david.murray | 2009-06-22 18:11:04 -0400 (Mon, 22 Jun 2009) | 2 lines Improve English phrasing. ........ r73554 | r.david.murray | 2009-06-25 10:21:06 -0400 (Thu, 25 Jun 2009) | 2 lines Add a couple of missing function alias declarations to the turtle docs. ........
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4 changed files with 33 additions and 14 deletions
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@ -151,7 +151,7 @@ available. They are listed here in alphabetical order.
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``'exec'`` if *source* consists of a sequence of statements, ``'eval'`` if it
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``'exec'`` if *source* consists of a sequence of statements, ``'eval'`` if it
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consists of a single expression, or ``'single'`` if it consists of a single
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consists of a single expression, or ``'single'`` if it consists of a single
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interactive statement (in the latter case, expression statements that
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interactive statement (in the latter case, expression statements that
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evaluate to something else than ``None`` will be printed).
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evaluate to something other than ``None`` will be printed).
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The optional arguments *flags* and *dont_inherit* control which future
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The optional arguments *flags* and *dont_inherit* control which future
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statements (see :pep:`236`) affect the compilation of *source*. If neither
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statements (see :pep:`236`) affect the compilation of *source*. If neither
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@ -1710,8 +1710,8 @@ written in Python, such as a mail server's external command delivery program.
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(Note that the :mod:`subprocess` module provides more powerful facilities for
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(Note that the :mod:`subprocess` module provides more powerful facilities for
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spawning new processes and retrieving their results; using that module is
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spawning new processes and retrieving their results; using that module is
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preferable to using these functions. Check specially the *Replacing Older
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preferable to using these functions. Check especially the
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Functions with the subprocess Module* section in that documentation page.)
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:ref:`subprocess-replacements` section.)
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If *mode* is :const:`P_NOWAIT`, this function returns the process id of the new
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If *mode* is :const:`P_NOWAIT`, this function returns the process id of the new
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process; if *mode* is :const:`P_WAIT`, returns the process's exit code if it
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process; if *mode* is :const:`P_WAIT`, returns the process's exit code if it
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@ -39,9 +39,12 @@ This module defines one class called :class:`Popen`:
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Arguments are:
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Arguments are:
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*args* should be a string, or a sequence of program arguments. The program
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*args* should be a string, or a sequence of program arguments. The program
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to execute is normally the first item in the args sequence or the string if a
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to execute is normally the first item in the args sequence or the string if
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string is given, but can be explicitly set by using the *executable*
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a string is given, but can be explicitly set by using the *executable*
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argument.
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argument. When *executable* is given, the first item in the args sequence
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is still treated by most programs as the command name, which can then be
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different from the actual executable name. On Unix, it becomes the display
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name for the executing program in utilities such as :program:`ps`.
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On Unix, with *shell=False* (default): In this case, the Popen class uses
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On Unix, with *shell=False* (default): In this case, the Popen class uses
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:meth:`os.execvp` to execute the child program. *args* should normally be a
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:meth:`os.execvp` to execute the child program. *args* should normally be a
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@ -354,8 +357,8 @@ Replacing shell pipeline
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output = p2.communicate()[0]
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output = p2.communicate()[0]
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Replacing os.system()
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Replacing :func:`os.system`
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^^^^^^^^^^^^^^^^^^^^^
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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::
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::
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@ -382,8 +385,8 @@ A more realistic example would look like this::
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print >>sys.stderr, "Execution failed:", e
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print >>sys.stderr, "Execution failed:", e
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Replacing the os.spawn family
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Replacing the :func:`os.spawn <os.spawnl>` family
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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P_NOWAIT example::
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P_NOWAIT example::
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@ -410,8 +413,8 @@ Environment example::
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Popen(["/bin/mycmd", "myarg"], env={"PATH": "/usr/bin"})
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Popen(["/bin/mycmd", "myarg"], env={"PATH": "/usr/bin"})
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Replacing os.popen, os.popen2, os.popen3
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Replacing :func:`os.popen`, :func:`os.popen2`, :func:`os.popen3`
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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::
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::
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@ -453,9 +456,23 @@ Replacing os.popen, os.popen2, os.popen3
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stdin=PIPE, stdout=PIPE, stderr=STDOUT, close_fds=True)
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stdin=PIPE, stdout=PIPE, stderr=STDOUT, close_fds=True)
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(child_stdin, child_stdout_and_stderr) = (p.stdin, p.stdout)
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(child_stdin, child_stdout_and_stderr) = (p.stdin, p.stdout)
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Return code handling translates as follows::
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Replacing functions from the popen2 module
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pipe = os.popen(cmd, 'w')
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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...
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rc = pipe.close()
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if rc != None and rc % 256:
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print "There were some errors"
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==>
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process = Popen(cmd, 'w', stdin=PIPE)
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...
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process.stdin.close()
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if process.wait() != 0:
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print "There were some errors"
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Replacing functions from the :mod:`popen2` module
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. note::
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.. note::
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@ -1140,6 +1140,7 @@ Appearance
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.. function:: shapesize(stretch_wid=None, stretch_len=None, outline=None)
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.. function:: shapesize(stretch_wid=None, stretch_len=None, outline=None)
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turtlesize(stretch_wid=None, stretch_len=None, outline=None)
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:param stretch_wid: positive number
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:param stretch_wid: positive number
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:param stretch_len: positive number
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:param stretch_len: positive number
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@ -1332,6 +1333,7 @@ Special Turtle methods
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.. function:: getturtle()
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.. function:: getturtle()
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getpen()
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Return the Turtle object itself. Only reasonable use: as a function to
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Return the Turtle object itself. Only reasonable use: as a function to
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return the "anonymous turtle":
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return the "anonymous turtle":
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