# Program is working but "Print"/"rospy.logwarn" or "rospy.loginfo" doesnt appear in shell

**URL:** <https://get-help.theconstruct.ai/t/program-is-working-but-print-rospy-logwarn-or-rospy-loginfo-doesnt-appear-in-shell/2620>\
**Category:** Using OpenAI With ROS\
**Tags:** howto, shell\
**Created:** [March 20, 2020, 7:47am UTC](https://get-help.theconstruct.ai/t/program-is-working-but-print-rospy-logwarn-or-rospy-loginfo-doesnt-appear-in-shell/2620 "2020-03-20T07:47:40Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![gayda.julian](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/gayda.julian/32/10_2.png) [@gayda.julian](https://get-help.theconstruct.ai/u/gayda.julian)\
**Post date:** [March 20, 2020, 7:47am UTC](https://get-help.theconstruct.ai/t/program-is-working-but-print-rospy-logwarn-or-rospy-loginfo-doesnt-appear-in-shell/2620/1 "2020-03-20T07:47:40Z")

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Hello,

first of all my programm works! 🙂  
But i am missing the output of the parameters in the shell:  
rospy.logwarn (("\n|"+str(nepisodes)+"|"+str(sarsa.alpha)+"|"+str(sarsa.gamma)+"|"+str(  
initial\_epsilon)+"\*"+str(epsilon\_discount)+"|"+str(highest\_reward)+"| PICTURE |"))

Why it doesnt appear in the shell? Also there appears no “print” or “rospy.loginfo”.  
The only thing that appears is “EPISODE=\>1…”  
Sorry for my bad english and thank you for your help. 🙂

This is the message:

roslaunch cartpole\_v0\_training start\_training.launch  
… logging to /home/user/.ros/log/3a54fb10-6a7d-11ea-ad4e-02fb4e3d1be2/roslaunch-rosdscomputer-3109.log  
Checking log directory for disk usage. This may take awhile.  
Press Ctrl-C to interrupt  
Done checking log file disk usage. Usage is \<1GB.

started roslaunch server [http://rosdscomputer:35213/](http://rosdscomputer:35213/)

# SUMMARY

PARAMETERS

- /cartpole\_v0/alpha: 0.1
- /cartpole\_v0/control\_type: velocity
- /cartpole\_v0/epsilon: 0.9
- /cartpole\_v0/epsilon\_discount: 0.999
- /cartpole\_v0/gamma: 0.7
- /cartpole\_v0/init\_pos: 0.0
- /cartpole\_v0/max\_base\_pose\_x: 2.0
- /cartpole\_v0/max\_base\_velocity: 50
- /cartpole\_v0/max\_pole\_angle: 0.7
- /cartpole\_v0/min\_base\_pose\_x: -2.0
- /cartpole\_v0/min\_pole\_angle: -0.7
- /cartpole\_v0/n\_actions: 4
- /cartpole\_v0/nepisodes: 500
- /cartpole\_v0/nsteps: 1000
- /cartpole\_v0/number\_splits: 10
- /cartpole\_v0/pos\_step: 0.016
- /cartpole\_v0/running\_step: 0.04
- /cartpole\_v0/wait\_time: 0.1
- /rosdistro: kinetic
- /rosversion: 1.12.14

NODES  
/  
cartpole\_gym (cartpole\_v0\_training/start\_training.py)

ROS\_MASTER\_URI=http://master:11311

process[cartpole\_gym-1]: started with pid [3133]  
/usr/local/lib/python2.7/dist-packages/requests/ **init**.py:91: RequestsDependencyWarning: urllib3 (1.25.8) or chardet (2.3.0) doesn’t match a supported version!  
RequestsDependencyWarning)  
/usr/local/lib/python2.7/dist-packages/requests/ **init**.py:83: RequestsDependencyWarning: Old version of cryptography ([1, 2, 3]) may cause slowdown.  
warnings.warn(warning, RequestsDependencyWarning)  
[WARN] [1584689695.793955, 0.005000]: Start Init ControllersConnection  
[WARN] [1584689695.794429, 0.005000]: END Init ControllersConnection  
[INFO] [1584689695.797262, 0.005000]: Gym environment done  
[INFO] [1584689695.798367, 0.005000]: Monitor Wrapper started  
[INFO] [1584689695.809661, 0.005000]: EPISODE=\>0  
[INFO] [1584689698.495177, 2.278000]: EPISODE=\>1  
[INFO] [1584689700.309672, 1.585000]: EPISODE=\>2  
[INFO] [1584689701.494587, 1.010000]: EPISODE=\>3  
[INFO] [1584689704.313979, 2.478000]: EPISODE=\>4  
[INFO] [1584689705.901626, 1.364000]: EPISODE=\>5  
[INFO] [1584689706.946588, 0.881000]: EPISODE=\>6  
^C[cartpole\_gym-1] killing on exit

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<div class="post-metadata">

**Author:** ![simon.steinmann91](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/simon.steinmann91/32/324_2.png) [@simon.steinmann91](https://get-help.theconstruct.ai/u/simon.steinmann91)\
**Post date:** [March 20, 2020, 4:01pm UTC](https://get-help.theconstruct.ai/t/program-is-working-but-print-rospy-logwarn-or-rospy-loginfo-doesnt-appear-in-shell/2620/2 "2020-03-20T16:01:43Z")

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Hi @gayda.julian,

Make sure you have the correct loglevel activated when launching the node:  
INFO doesnt show Warnings or Errors  
WARN doesnt show ERRORS

`rospy.init_node('cartpole_gym', anonymous=True, log_level=rospy.WARN)`