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I am new for the ROS and I am learning the Tutorials.My system is Ubuntu14.04,and My ROS is ROS-INDIGO.And I have installed anaconda3 and python3.7.3.

$PATH:/opt/ros/indigo/bin:/home/hxy/anaconda3/bin:/home/hxy/anaconda3/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games

$PYTHONPATH:/usr/lib/python2.7/dist-packages:/opt/ros/indigo/lib/python2.7/dist-packages

$ROS_PACKAGE_PATH:/home/hxy/tool/catkin_ws/src:/opt/ros/indigo/share:/opt/ros/indigo/stacks

In the "Understanding ROS Topics" chapter,it request me input the following command: rosrun rqt_graph rqt_graph

An error appears after that:

Traceback (most recent call last):

File "/opt/ros/indigo/lib/rqt_graph/rqt_graph", line 5, in <module> from rqt_gui.main import Main

File "/opt/ros/indigo/lib/python2.7/dist-packages/rqt_gui/main.py", line 38, in <module> import rospy

File "/opt/ros/indigo/lib/python2.7/dist-packages/rospy/__init__.py", line 49, in <module> from .client import spin, myargv, init_node, \

File "/opt/ros/indigo/lib/python2.7/dist-packages/rospy/client.py", line 47, in <module> import yaml

File "/usr/lib/python2.7/dist-packages/yaml/__init__.py", line 2, in <module> from error import *

ModuleNotFoundError: No module named 'error'

So I have googled and find the reason:My anaconda3 have a confilict with my ROS. When I remove conda initialize in my .bashrc I can solve the error.

My question is :why they have a conflict?(I guess due to ROS's python version and the anaconda3's python version).

I have searched any question in answers.ros.If there is already an answer,I am sorry for my mistake.

Why my ros-indigo have a conflict with anaconda3 I am new for the ROS and I am learning the Tutorials.My system is Ubunt

Why my ros-indigo have a conflict with anaconda3 I am new for the ROS and I am learning the Tutorials.My system is Ubunt

Hi,I meet the same question.And unfortunately pip and pip3 command couldn't help me. So I back to the root folder by :c