Jenkins Python Job

[Mahryama issifu]

Hi All,

I have a job running on Jenkins server, which builds python script. The script has to display a bar chart as final output.

The build agent I am using on Jenkins appears to have python installed. I confirmed this by adding a build step as python3 —version and the result was: Python 3.6.8.

Why then do I have this error showing. Do I need to install a plugin? 

Kind regards 

Mari

Traceback (most recent call last)

File "newjenkins.py", line 7, in <module>

import matplotlib.pyplot as plt

File "/usr/lib64/python2.7/site-packages/matplotlib/pyplot.py", line 97, in <module>

_backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()

File "/usr/lib64/python2.7/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup

globals(),locals(),[backend_name])

File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_gtkagg.py", line 10, in <module>

from matplotlib.backends.backend_gtk import gtk, FigureManagerGTK, FigureCAnvasGTK, \

File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_gtk.py", line 13, in <module>

import gtk, gdk = gtk.gdk

File "/usr/lib64/python2.7/site-packages/gtk-2.0/gtk/__init__.py", line 64, in <module>

_init()

File "/usr/lib64/python2.7/site-packages/gtk-2.0/gtk/__init__.py", line 52, in _init

_gtk.init_check()

RuntimeError: could not open display

[Mark Waite]

That output indicates that the program is choosing to run Python 2 packages (like gtk) with Python 3.  You probably need Python 3 packages to run with Python 3.6.8. 

Installing a plugin won't help.  Python 2 reached end of life in 2020, per https://www.python.org/doc/sunset-python-2/

[Mahryama issifu]



Hi Mark

I have checked the Jenkins build agent I am using, and it as python3.6.8 installed. I don’t understand why the program is choosing python 2 packages. Do I have to check which python version or path is being used by the build agent. 

I made some changes to my codes: before importing ‘matplotlib.pyplot’ I set the ‘marplotlib’ backend to non interractive one, such as ‘Agg’.

Like this: 

import matplotlib

matplotlib.use('Agg') # This line should be before importing pyplot

import matplotlib.pyplot as plt

I then proceeded to build on jenkins and that worked out. 

However, there is a new error code on Jenkins again.

Kind regards 

Mari

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[Mark Waite]

On Thursday, August 10, 2023 at 3:35:54 PM UTC-6 Mari wrote:



Hi Mark

I have checked the Jenkins build agent I am using, and it as python3.6.8 installed. I don’t understand why the program is choosing python 2 packages. Do I have to check which python version or path is being used by the build agent. 

I made some changes to my codes: before importing ‘matplotlib.pyplot’ I set the ‘marplotlib’ backend to non interractive one, such as ‘Agg’.

Like this: 

import matplotlib

matplotlib.use('Agg') # This line should be before importing pyplot

import matplotlib.pyplot as plt

I then proceeded to build on jenkins and that worked out. 

However, there is a new error code on Jenkins again.

That's not a Jenkins error.  That's a configuration error on your agent.  If you login on that agent as the same user that is running the Jenkins agent, you'll see the same message.

The operating system on that agent is configured to provide Python 2 libraries from the system directories (/usr/lib64/python2.7) but is executing Python 3 code.  You'll need to fix the operating system configuration on the agent.

Talk to your local experts that understand how your chosen operating system is configured.  Remote debugging of an operating system configuration error will be too painful and slow for you.

Mark Waite

 

[Mahryama issifu]

Thank you Mark. 

That was very helpful

BW

Mari

On 10 Aug 2023, at 22:50, Mark Waite <mark.ea...@gmail.com> wrote:

On Thursday, August 10, 2023 at 3:35:54 PM UTC-6 Mari wrote:



Hi Mark

I have checked the Jenkins build agent I am using, and it as python3.6.8 installed. I don’t understand why the program is choosing python 2 packages. Do I have to check which python version or path is being used by the build agent. 

I made some changes to my codes: before importing ‘matplotlib.pyplot’ I set the ‘marplotlib’ backend to non interractive one, such as ‘Agg’.

Like this: 

import matplotlib

matplotlib.use('Agg') # This line should be before importing pyplot

import matplotlib.pyplot as plt

I then proceeded to build on jenkins and that worked out. 

However, there is a new error code on Jenkins again.

<image0.jpeg>

That's not a Jenkins error.  That's a configuration error on your agent.  If you login on that agent as the same user that is running the Jenkins agent, you'll see the same message.

The operating system on that agent is configured to provide Python 2 libraries from the system directories (/usr/lib64/python2.7) but is executing Python 3 code.  You'll need to fix the operating system configuration on the agent.

Talk to your local experts that understand how your chosen operating system is configured.  Remote debugging of an operating system configuration error will be too painful and slow for you.

Mark Waite

 

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