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During installation: No module named 'encodings' #600
Description
Dear more experienced user of Julia,
I work on a cluster where one of the users wants to run Julia software that uses the PyCall en PyPlot packages.
We have Python 3.12.4, with MatPlotLib.
I have Julia 1.11.1, and try to follow the documentation on PyPlot's github page to install it. However, I fail to do so, on the eventual error:
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'
There appears to be no Python module called 'encodings', according to pip search
My complete error message is:
julia> Pkg.add("PyPlot")
[a lot of depenced that actually do work]
Precompiling project...
✗ PyPlot
15 dependencies successfully precompiled in 13 seconds. 22 already precompiled.
1 dependency errored.
For a report of the errors see `julia> err`. To retry use `pkg> precompile`
julia> err
PkgPrecompileError: The following 1 direct dependency failed to precompile:
PyPlot
Failed to precompile PyPlot [d330b81b-6aea-500a-939a-2ce795aea3ee] to "/eejit/home/lukas/.julia/compiled/v1.11/PyPlot/jl_dBQBnk".
Python path configuration:
PYTHONHOME = '/trinity/opt/apps/development/dev2024/install:/trinity/opt/apps/development/dev2024/install'
PYTHONPATH = (not set)
program name = '/trinity/opt/apps/development/dev2024/install/bin/python3'
isolated = 0
environment = 1
user site = 1
import site = 1
sys._base_executable = '/trinity/opt/apps/development/dev2024/install/bin/python3'
sys.base_prefix = '/trinity/opt/apps/development/dev2024/install'
sys.base_exec_prefix = '/trinity/opt/apps/development/dev2024/install'
sys.platlibdir = 'lib64'
sys.executable = '/trinity/opt/apps/development/dev2024/install/bin/python3'
sys.prefix = '/trinity/opt/apps/development/dev2024/install'
sys.exec_prefix = '/trinity/opt/apps/development/dev2024/install'
sys.path = [
'/trinity/opt/apps/development/dev2024/install/lib64/python39.zip',
'/trinity/opt/apps/development/dev2024/install/lib64/python3.9',
'/trinity/opt/apps/development/dev2024/install/lib64/python3.9/lib-dynload',
]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'
Current thread 0x00001555552d10c0 (most recent call first):
<no Python frame
Is this 'encodings' module something I should install outside of the package management system and link to with PYTHONPATH, or so?
Does anybody know what is going wrong / what I am doing wrong?
Thanks a lot!
Lukas
Activity
stevengj commentedon Oct 27, 2025
The
encodingsmodule is part of the Python standard library, so probably this means that there is something wrong with your Python installation. See e.g. https://stackoverflow.com/questions/38132755/importerror-no-module-named-encodings and many similar discussions online.For example, what happens if you run
/trinity/opt/apps/development/dev2024/install/bin/python3and typeimport encodingsat the Python prompt?