Noo module named slycot

Hi,
I recently tried to install slycot via pip. Before that I installed the following dependencies:

pip install cmake
pip install scikit-build
sudo apt-get install libopenblas-dev

Everything installs without any errors, but when I am trying to import slycot, I get the following error message:

ModuleNotFoundError: No module named 'slycot'

Am I missing something?

pip install cmake

Probably isn't doing what you think it should. You should apt install cmake.

I take that back. It actually seems like cmake is packaged for installation via pypi: https://pypi.org/project/cmake/

I also tried to install slycot from source which leads to the same issue.
Cmake is of course installed on my system.

Are you sure you have installed the package into a directory that is on your path? Are you trying to import from the same Python executable that the package was installed alongside?

I fixed that, because I had the same issue : #62

Thanks for that PR. When are the sources released on Pypi?

…

Am 20.05.2019 um 10:32 schrieb jgspiro ***@***.***>: I fixed that, because I had the same issue : #62 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

I don't think we've fixed this. It's related to #3, and is at least partly addressed by #64.

Ah-ha; the files have been installed in "slycot" off the virtual-env root, rather than in site-packages; I remember this happening on Windows when I was trying to build wheels there, but I thought it was a peculiarity of that environment. The result below is from an Ubuntu 18.04 system.

If anyone knows why this would happen, please speak up. Do we need to teach scikit-build or CMake about the "normal" install directories, maybe?

(slycot-via-pip) rory@rory-latitude:~$ pip show -f slycot
Name: slycot
Version: 0.3.4
Summary: Slycot: a wrapper for the SLICOT control and systems library
Home-page: https://github.com/python-control/Slycot
Author: Enrico Avventi et al.
Author-email: None
License: GPL-2.0
Location: /home/rory/.miniconda3/envs/slycot-via-pip/lib/python3.7/site-packages
Requires: 
Required-by: 
Files:
  ../../../slycot/__init__.py
  ../../../slycot/__pycache__/__init__.cpython-37.pyc
  ../../../slycot/__pycache__/analysis.cpython-37.pyc
  ../../../slycot/__pycache__/examples.cpython-37.pyc
  ../../../slycot/__pycache__/math.cpython-37.pyc
  ../../../slycot/__pycache__/synthesis.cpython-37.pyc
  ../../../slycot/__pycache__/transform.cpython-37.pyc
  ../../../slycot/__pycache__/version.cpython-37.pyc
  ../../../slycot/_wrapper.so
  ../../../slycot/analysis.py
  ../../../slycot/examples.py
  ../../../slycot/math.py
  ../../../slycot/synthesis.py
  ../../../slycot/tests/__init__.py
  ../../../slycot/tests/__pycache__/__init__.cpython-37.pyc
  ../../../slycot/tests/__pycache__/test.cpython-37.pyc
  ../../../slycot/tests/__pycache__/test_sg02ad.cpython-37.pyc
  ../../../slycot/tests/__pycache__/test_sg03ad.cpython-37.pyc
  ../../../slycot/tests/__pycache__/test_tb05ad.cpython-37.pyc
  ../../../slycot/tests/__pycache__/test_td04ad.cpython-37.pyc
  ../../../slycot/tests/test.py
  ../../../slycot/tests/test_sg02ad.py
  ../../../slycot/tests/test_sg03ad.py
  ../../../slycot/tests/test_tb05ad.py
  ../../../slycot/tests/test_td04ad.py
  ../../../slycot/transform.py
  ../../../slycot/version.py
  slycot-0.3.4.dist-info/COPYING
  slycot-0.3.4.dist-info/INSTALLER
  slycot-0.3.4.dist-info/METADATA
  slycot-0.3.4.dist-info/RECORD
  slycot-0.3.4.dist-info/WHEEL
  slycot-0.3.4.dist-info/top_level.txt

(slycot-via-pip) rory@rory-latitude:~$ python -c "import sys; print(sys.path)"
['', '/home/rory/.miniconda3/envs/slycot-via-pip/lib/python37.zip', '/home/rory/.miniconda3/envs/slycot-via-pip/lib/python3.7', '/home/rory/.miniconda3/envs/slycot-via-pip/lib/python3.7/lib-dynload', '/home/rory/.miniconda3/envs/slycot-via-pip/lib/python3.7/site-packages']

With the diff below, I can build a wheel (python setup.py bdist_wheel), install it (pip install slycot-0.3.4.9-cp37-cp37m-linux_x86_64.whl), and then import slycot works, and pip show -f slycot is

Name: slycot
Version: 0.3.4.9
Summary: Slycot: a wrapper for the SLICOT control and systems library
Home-page: https://github.com/python-control/Slycot
Author: Enrico Avventi et al.
Author-email: None
License: GPL-2.0
Location: /home/rory/.miniconda3/envs/slycot-via-pip/lib/python3.7/site-packages
Requires: 
Required-by: 
Files:
  slycot-0.3.4.9.dist-info/COPYING
  slycot-0.3.4.9.dist-info/INSTALLER
  slycot-0.3.4.9.dist-info/METADATA
  slycot-0.3.4.9.dist-info/RECORD
  slycot-0.3.4.9.dist-info/WHEEL
  slycot-0.3.4.9.dist-info/top_level.txt
  slycot/__init__.py
  slycot/__pycache__/__init__.cpython-37.pyc
  slycot/__pycache__/analysis.cpython-37.pyc
  slycot/__pycache__/examples.cpython-37.pyc
  slycot/__pycache__/math.cpython-37.pyc
  slycot/__pycache__/synthesis.cpython-37.pyc
  slycot/__pycache__/transform.cpython-37.pyc
  slycot/__pycache__/version.cpython-37.pyc
  slycot/_wrapper.so
  slycot/analysis.py
  slycot/examples.py
  slycot/math.py
  slycot/synthesis.py
  slycot/tests/__init__.py
  slycot/tests/__pycache__/__init__.cpython-37.pyc
  slycot/tests/__pycache__/test.cpython-37.pyc
  slycot/tests/__pycache__/test_sg02ad.cpython-37.pyc
  slycot/tests/__pycache__/test_sg03ad.cpython-37.pyc
  slycot/tests/__pycache__/test_tb05ad.cpython-37.pyc
  slycot/tests/__pycache__/test_td04ad.cpython-37.pyc
  slycot/tests/test.py
  slycot/tests/test_sg02ad.py
  slycot/tests/test_sg03ad.py
  slycot/tests/test_tb05ad.py
  slycot/tests/test_td04ad.py
  slycot/transform.py
  slycot/version.py

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63b32e0..67973f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,8 @@ endif()
 
 project(slycot VERSION ${SLYCOT_VERSION} LANGUAGES NONE)
 
+find_package(PythonExtensions REQUIRED)
+
 # Fortran detection fails on windows, use the CMAKE_C_SIMULATE flag to
 # force success
 if(WIN32)
diff --git a/slycot/CMakeLists.txt b/slycot/CMakeLists.txt
index 3207d92..7d8c377 100644
--- a/slycot/CMakeLists.txt
+++ b/slycot/CMakeLists.txt
@@ -3,7 +3,6 @@
 #
 # RvP, 180710
 
-
 set(FSOURCES
 
   src/AB01MD.f src/MA02AD.f src/MB03YT.f src/NF01BW.f src/SB10KD.f
@@ -166,7 +165,7 @@ target_include_directories(
   ${PYTHON_INCLUDE_DIRS}
   )
 
-install(TARGETS ${SLYCOT_MODULE} DESTINATION slycot)
-install(FILES ${PYSOURCE} DESTINATION slycot)
+install(TARGETS ${SLYCOT_MODULE} DESTINATION ${PYTHON_RELATIVE_SITE_PACKAGES_DIR}/slycot)
+install(FILES ${PYSOURCE} DESTINATION ${PYTHON_RELATIVE_SITE_PACKAGES_DIR}/slycot)
 
 add_subdirectory(tests)
diff --git a/slycot/tests/CMakeLists.txt b/slycot/tests/CMakeLists.txt
index c97cb50..7de8521 100644
--- a/slycot/tests/CMakeLists.txt
+++ b/slycot/tests/CMakeLists.txt
@@ -3,4 +3,4 @@ set(PYSOURCE
   __init__.py test.py test_sg02ad.py test_sg03ad.py test_tb05ad.py
   test_td04ad.py)
 
-install(FILES ${PYSOURCE} DESTINATION slycot/tests)
+install(FILES ${PYSOURCE} DESTINATION ${PYTHON_RELATIVE_SITE_PACKAGES_DIR}/slycot/tests)

This is fixed in #67, for Linux and (I think) OSX. Hopefully soon available in 0.3.5 (#70).

Please reopen if the bug is still there on 0.3.5.

It's not mentioned in #67 but the fix is actually in commit 2e41c2f

Navigation Menu

Repository navigation

Noo module named slycot #63

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Noo module named slycot #63

Description

Activity

moorepants commented on May 18, 2019

moorepants commented on May 18, 2019

nilsmelchert commented on May 18, 2019

moorepants commented on May 18, 2019

jgspiro commented on May 20, 2019

nilsmelchert commented on May 20, 2019

roryyorke commented on May 25, 2019

roryyorke commented on May 25, 2019

roryyorke commented on May 25, 2019

roryyorke commented on Jun 21, 2019

bnavigator commented on Jun 21, 2019

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions