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rospack depends1 error, rosdep version?

asked 2014-05-01 02:57:34 -0500

mechanicalmanb gravatar image

updated 2014-05-01 14:48:43 -0500

I am trying to install Hydro on Ubuntu 12.04. I follow the directions straight through, everything seems to install perfectly fine. I make my way through the tutorials until I make it to creating an ROS package. (I'd include the link to the tutorial here as the tutorial itself recommends, but I have insufficient karma to do so).

When I try to run the line " $ rospack depends1 beginner_tutorials "

It throws an error, telling me that my rosdep version needs to be at least 0.10.40. (Sorry I'm on a different computer right now...I will try to reproduce the full error message and post it here in an edit ASAP).

I check my rosdep version with " $ rosdep --version ", and it tells me that I have 0.10.27 installed.

First, I'm very confused: following the tutorials from installation all the way here lead me to install versions that are already out of date and can't work. Did I miss something? I spend the next few hours trying to install some kind of newer version of rosdep, but I think there is something majorly wrong with my python installations (I have a couple versions and I haven't tightly controlled PYTHONPATH, etc. -- I'm new to python and basically never use it).

So bottom line, 3 questions:

  1. Did I miss something in the installation tutorial that would automatically install the proper rosdep version?

  2. If not, can the tutorial change to address this issue somehow?

  3. Can anyone recommend a tutorial on proper installation (and removing improper installation!) and PYTHONPATH setup for the python version that ROS Hydro needs?


EDIT 1: The full error message:

$ rospack depends1 beginner_tutorials
ImportError: No module named rosdep2.rospack
ImportError: No module named rosdep2.rospack
[rospack] Error: could not find python module 'rosdep2.rospack'. is rosdep up-to-date (at least 0.10.4)?

EDIT 2: I added to PYTHONPATH PYTHONPATH=/opt/ros/hydro/lib/python2.7/dist-packages:/usr/lib/pymodules/python2.7/rosdep2 because I found rosdep2/rospack.py in that folder. Now I get a different error:

 $ rospack depends1 beginner_tutorials 
    Traceback (most recent call last):
      File "/usr/lib/pymodules/python2.7/rosdep2/__init__.py", line 40, in <module>
        from .installers import InstallerContext, Installer, \
      File "/usr/lib/pymodules/python2.7/rosdep2/installers.py", line 35, in <module>
        from rospkg.os_detect import OsDetect
      File "/usr/lib/pymodules/python2.7/rospkg/__init__.py", line 43, in <module>
        from .rospack import RosPack, RosStack, \
      File "/usr/lib/pymodules/python2.7/rospkg/rospack.py", line 34, in <module>
        from xml.etree.cElementTree import ElementTree
      File "/usr/local/lib/python2.7/xml/etree/cElementTree.py", line 3, in <module>
        from _elementtree import *
    ImportError: /usr/local/lib/python2.7/lib-dynload/_elementtree.so: undefined symbol: PyUnicodeUCS2_DecodeUTF8
    Traceback (most recent call last):
      File "/usr/lib/pymodules/python2.7/rosdep2/__init__.py", line 40, in <module>
        from .installers import InstallerContext, Installer, \
      File "/usr/lib/pymodules/python2.7/rosdep2/installers.py", line 35, in <module>
        from rospkg.os_detect import OsDetect
      File "/usr/lib/pymodules ...
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Comments

The latest rosdep version is 0.10.27. Can you please post your exact error message? I guess the error message just said "at least 0.10.4".

Dirk Thomas gravatar image Dirk Thomas  ( 2014-05-01 06:26:49 -0500 )edit

What instructions are you following? If you follow these instructions http://wiki.ros.org/hydro/Installation/Ubuntu line for line it should work fine. For us to help you more. You need to provide a lot more details about what steps you are following.

tfoote gravatar image tfoote  ( 2014-05-01 13:39:32 -0500 )edit

Those are the exact instructions I used. Line by line.

mechanicalmanb gravatar image mechanicalmanb  ( 2014-05-01 14:12:37 -0500 )edit

You're doing things that are much too complicated. You must have state on the system which is not standard. I notice /usr/local in your tracebacks suggesting you've installed custom modules. Are there other modifications to the system?

tfoote gravatar image tfoote  ( 2014-05-01 21:35:10 -0500 )edit

I had installed python 2.7.6 and python 3.4 with default options before attempting to install ROS hydro. I agree with you, I think that there are some serious low level conflicts going on here that are beyond my skill. I installed Ubuntu 14.04 and installed ROS Indigo first, which works fine so far.

mechanicalmanb gravatar image mechanicalmanb  ( 2014-05-02 02:18:17 -0500 )edit

5 Answers

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answered 2014-09-23 15:40:27 -0500

messidona gravatar image

updated 2014-09-23 16:06:05 -0500

I got the exact same error after installing Indigo on Ubuntu 14.04. All I have done so far is follow exactly the instructions for installing ROS Indigo and the first few pages of the tutorial.

$ rospack depends1 beginner_tutorials 
ImportError: No module named rosdep2.rospack
ImportError: No module named rosdep2.rospack
[rospack] Error: could not find python module 'rosdep2.rospack'. is rosdep up-to-date (at least 0.10.4)?

I ran rosdep --version and I have 0.10.30. I also ran rosdep update but to no avail. Any help would be appreciated.

EDIT: The only other program that had been installed on my Ubuntu distribution was the anaconda ipython distribution. This seemed to be what was causing the problem. I ran $ rm -rf ~/anaconda to remove it and now

$ rospack depends1 beginner_tutorials 
std_msgs
rospy
roscpp

is function. So the problem was that https://www.youtube.com/watch?v=LDZX4... .

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Thank you for your answer, you saved me!

Haifei gravatar image Haifei  ( 2015-09-23 23:32:07 -0500 )edit
5

answered 2016-09-20 04:26:30 -0500

M_Allam gravatar image

pip install rosdep solved it for me

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Comments

Yeah me too. I didn't want to uninstall anaconda so I think this is the way to go

samuelwg gravatar image samuelwg  ( 2017-02-09 21:45:41 -0500 )edit

Ditto. I'm not interested in giving up anaconda as a "fix". First I used "which pip" to make sure my pip was the anaconda version and then using 'pip install rosdep' resolved this for me as well.

philglau gravatar image philglau  ( 2017-03-17 01:02:27 -0500 )edit

$ pip install rosdep solved the problem for me on ubuntu 18.

hafizas101 gravatar image hafizas101  ( 2019-09-11 15:38:01 -0500 )edit

You should not install packages with pip if there is a Debian package available. It would overlay the Debian package and therefore you would get newer updates so will likely run into problems in the future.

Dirk Thomas gravatar image Dirk Thomas  ( 2019-09-11 18:17:12 -0500 )edit
0

answered 2015-06-13 01:52:42 -0500

https://docs.python.org/2.7/faq/exten...

Because the python version . maybe you have update the python version , and the default how many chars representation unicode have chaged.

only you recompile the ros or python ,make them unicode chars the same.

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0

answered 2014-11-20 18:16:00 -0500

candidcypher gravatar image

I am experiencing the same exact thing and haven't installed ipyhon-notebook or anaconda yet.... Very interesting indeed.

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0

answered 2014-06-09 04:30:36 -0500

I got same problem. hic I installed python 2.7.6

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Asked: 2014-05-01 02:57:34 -0500

Seen: 5,402 times

Last updated: Nov 20 '14