rqt_bag: cannot import name qInfo

asked 2017-11-01 07:07:39 -0600

Yousof
63 ●3 ●6 ●7

Hi,

Today rqt_bag doesn't want to work. Giving me this error:

$ rqt_bag
Traceback (most recent call last):
  File "/opt/ros/kinetic/bin/rqt_bag", line 5, in <module>
    from rqt_bag.bag import Bag
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_bag/bag.py", line 39, in <module>
    from .bag_widget import BagWidget
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_bag/bag_widget.py", line 40, in <module>
    from python_qt_binding.QtCore import Qt, qInfo, qWarning, Signal
ImportError: cannot import name qInfo

I am running ROS kinetic on Ubuntu 16.04 and Ros just got updated today morning with apt upgrade.

Any idea how can I solve it?

answered 2017-11-08 02:43:03 -0600

VictorLamoine

1495 ●35 ●57 ●69

updated 2017-11-09 01:46:13 -0600

Please read the comments for more information about the resolution of this bug

Temporary fix

Edit the file:

sudo nano /opt/ros/kinetic/lib/python2.7/dist-packages/rqt_bag/bag_widget.py

Modify the line producing the error from:

from python_qt_binding.QtCore import Qt, qInfo, qWarning, Signal

from python_qt_binding.QtCore import Qt, qWarning, Signal

Then comment every call to qInfo in the code, you can find them with:

grep -rn "qInfo" /opt/ros/kinetic/lib/python2.7/dist-packages/rqt_bag/

Use nano or any other editor to comment the calls inside this python code.

You can then use rqt_bag again!

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Comments

Works as a charm. Tks!

Guilherme Schvarcz Franco ( 2017-11-08 08:19:19 -0600 )edit

Note that as @VictorLamoine already writes: this is really a temporary fix. As soon as you receive an updated .deb (through apt-get update fi) the changes will be overwritten.

gvdhoorn ( 2017-11-08 08:21:04 -0600 )edit

Bug where this is tracked: ros-visualization/rqt_bag#15.

And PR that (presumably) fixes it: ros-visualization/rqt_bag#16.

gvdhoorn ( 2017-11-08 08:22:02 -0600 )edit

And a PR that fixes the previous PR: ros-visualization/rqt_bag#17.

To quote @Dirk Thomas:

rqt_bag version 0.4.11 will fix the problem. I have just released that version so it might be a bit until it is available from Debian packages.

gvdhoorn ( 2017-11-08 08:23:45 -0600 )edit

For me, the temporary fix allows rqt_bag to start; however, attempting to load a bag file results in the same qInfo error. (Ubuntu 16.04, Kinetic)

Marvin ( 2017-11-12 09:40:55 -0600 )edit

@Marvin make sure you have done the last steps (grep + edit the file)

VictorLamoine ( 2017-11-13 02:20:33 -0600 )edit

Another option is to enable the Shadow Repository and install rqt and related pkgs from there. Don't forget to switch back to the default repository after doing that.

gvdhoorn ( 2017-11-13 02:40:10 -0600 )edit

I tried @VictorLamoine temporary fix and it worked for me, thanks

tonyParker ( 2017-12-01 05:58:26 -0600 )edit

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