transport, pw = yield from asyncio.get_event_loop() - SyntaxError: invalid syntax

[nagappan]

In Ubuntu 14.04, any suggestions to fix ?

/usr/bin/python setup.py install
running install
running build
running build_py
running install_lib
creating /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/screen.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/init.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/replwrap.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/expect.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/async.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/FSM.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/pxssh.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/fdpexpect.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/ANSI.py -> /usr/local/lib/python2.7/dist-packages/pexpect
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/screen.py to screen.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/init.py to init.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/replwrap.py to replwrap.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/expect.py to expect.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/async.py to async.pyc
File "/usr/local/lib/python2.7/dist-packages/pexpect/async.py", line 15
transport, pw = yield from asyncio.get_event_loop()
^
SyntaxError: invalid syntax

byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/FSM.py to FSM.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/pxssh.py to pxssh.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/fdpexpect.py to fdpexpect.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/ANSI.py to ANSI.pyc
running install_egg_info
Writing /usr/local/lib/python2.7/dist-packages/pexpect-3.3.egg-info

[takluyver]

It should install fine anyway. That module is only relevant on python 3, but the rest of pexpect will work without it.

[nagappan]

git clone git://github.com/pexpect/pexpect.git
Cloning into 'pexpect'...
remote: Counting objects: 5407, done.
remote: Total 5407 (delta 0), reused 0 (delta 0), pack-reused 5407
Receiving objects: 100% (5407/5407), 8.33 MiB | 5.57 MiB/s, done.
Resolving deltas: 100% (3114/3114), done.
Checking connectivity... done.

/pexpect# /usr/bin/python setup.py build
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'install_requires'
warnings.warn(msg)
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
copying pxssh.py -> build/lib.linux-x86_64-2.7
copying fdpexpect.py -> build/lib.linux-x86_64-2.7
copying FSM.py -> build/lib.linux-x86_64-2.7
copying screen.py -> build/lib.linux-x86_64-2.7
copying ANSI.py -> build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/pexpect
copying pexpect/screen.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/pty_spawn.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/init.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/utils.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/replwrap.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/spawnbase.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/expect.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/async.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/FSM.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/pxssh.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/fdpexpect.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/ANSI.py -> build/lib.linux-x86_64-2.7/pexpect
copying pexpect/exceptions.py -> build/lib.linux-x86_64-2.7/pexpect
root@promc-2s-109-dhcp174:/pexpect# /usr/bin/python setup.py install
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'install_requires'
warnings.warn(msg)
running install
running build
running build_py
running install_lib
copying build/lib.linux-x86_64-2.7/screen.py -> /usr/local/lib/python2.7/dist-packages
copying build/lib.linux-x86_64-2.7/pexpect/screen.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/pty_spawn.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/init.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/utils.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/replwrap.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/spawnbase.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/expect.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/async.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/FSM.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/pxssh.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/fdpexpect.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/ANSI.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/pexpect/exceptions.py -> /usr/local/lib/python2.7/dist-packages/pexpect
copying build/lib.linux-x86_64-2.7/FSM.py -> /usr/local/lib/python2.7/dist-packages
copying build/lib.linux-x86_64-2.7/pxssh.py -> /usr/local/lib/python2.7/dist-packages
copying build/lib.linux-x86_64-2.7/fdpexpect.py -> /usr/local/lib/python2.7/dist-packages
copying build/lib.linux-x86_64-2.7/ANSI.py -> /usr/local/lib/python2.7/dist-packages
byte-compiling /usr/local/lib/python2.7/dist-packages/screen.py to screen.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/screen.py to screen.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/pty_spawn.py to pty_spawn.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/init.py to init.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/utils.py to utils.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/replwrap.py to replwrap.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/spawnbase.py to spawnbase.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/expect.py to expect.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/async.py to async.pyc
File "/usr/local/lib/python2.7/dist-packages/pexpect/async.py", line 16
transport, pw = yield from asyncio.get_event_loop()
^
SyntaxError: invalid syntax

byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/FSM.py to FSM.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/pxssh.py to pxssh.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/fdpexpect.py to fdpexpect.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/ANSI.py to ANSI.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pexpect/exceptions.py to exceptions.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/FSM.py to FSM.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/pxssh.py to pxssh.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/fdpexpect.py to fdpexpect.pyc
byte-compiling /usr/local/lib/python2.7/dist-packages/ANSI.py to ANSI.pyc
running install_egg_info
Writing /usr/local/lib/python2.7/dist-packages/pexpect-4.0.dev.egg-info

[takluyver]

Just ignore the error and use it anyway. That part of the code is not for Python 2, so it doesn't matter.

[nagappan]

Thanks

[didrocks]

Hey, however, this is an issue for distributions like ubuntu which pre-compiles the .py in .pyc at install time (once for python2, once for python3).
python-pexpect will fail to install (like in https://bugs.launchpad.net/ubuntu/+source/ubuntu-make/+bug/1507871) due to this. It seems the "yield from" python2 shims are not straightforward, any suggestions?

[sagarpanchal]

@nagappan I got solution!
run following command,
mv /usr/local/lib/python2.7/dist-packages/pexpect/async.py /usr/local/lib/python2.7/dist-packages/pexpect/async.py.old && sudo apt-get dist-upgrade && mv /usr/local/lib/python2.7/dist-packages/pexpect/async.py.old /usr/local/lib/python2.7/dist-packages/pexpect/async.py

[jquast]

@sagarpanchal @didrocks you may also patch MANIFEST.in to exclude the same. The project works fine with the file removed, as it is conditionally imported for only python 3:

echo 'exclude pexpect/async.py' >> MANIFEST.in