Remove unused Python imports and dependencies

changelog-entries/896.md

@@ -0,0 +1 @@
+- Removed unused Python imports and direct dependencies from tutorial participants. [#896](https://github.com/precice/tutorials/pull/896)

channel-transport-particles/fluid-nutils/fluid.py

@@ -8,7 +8,6 @@
 import treelog as log
 import numpy as np
 import precice
-from mpi4py import MPI
 
 
 def main():

channel-transport-reaction/plot.py

@@ -1,6 +1,5 @@
 import pandas as pd
 import matplotlib.pyplot as plt
-import numpy as np
 
 plt.rcParams["figure.figsize"] = [7.50, 3.50]
 plt.rcParams["figure.autolayout"] = True

channel-transport/fluid-nutils/fluid.py

@@ -8,7 +8,6 @@
 import treelog as log
 import numpy as np
 import precice
-from mpi4py import MPI
 
 
 def main():

channel-transport/transport-nutils/transport.py

@@ -6,11 +6,9 @@
 
 from nutils import function, mesh, cli, solver, export
 import treelog as log
-import argparse
 import numpy as np
 import json
 import precice
-from mpi4py import MPI
 
 
 def reinitialize_namespace(domain, geom):

elastic-tube-1d/fluid-python/FluidSolver.py

@@ -1,9 +1,7 @@
 from __future__ import division, print_function
-import os
-import sys
 import argparse
 import outputConfiguration as config
-from thetaScheme import perform_partitioned_implicit_trapezoidal_rule_step, perform_partitioned_implicit_euler_step
+from thetaScheme import perform_partitioned_implicit_euler_step
 import numpy as np
 import tubePlotting
 import matplotlib.pyplot as plt

elastic-tube-1d/plot-vtk.py

@@ -2,10 +2,9 @@
 
 import vtk
 import numpy as np
-import os
 import sys
 import matplotlib.pyplot as plt
-from mpl_toolkits.mplot3d import Axes3D
+from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 - registers projection='3d' on Matplotlib <3.2
 
 T = 100  # number of timesteps performed
 

elastic-tube-1d/solid-python/SolidSolver.py

@@ -1,7 +1,5 @@
 from __future__ import division, print_function
 
-import os
-import sys
 import argparse
 import numpy as np
 import precice

elastic-tube-3d/solid-fenics/solid.py

@@ -1,6 +1,5 @@
 # Import required libs
-from fenics import Constant, Function, AutoSubDomain, VectorFunctionSpace, interpolate, \
-    TrialFunction, TestFunction, Point, Expression, DirichletBC, \
+from fenics import Constant, Function, AutoSubDomain, VectorFunctionSpace, TrialFunction, TestFunction, Point, DirichletBC, \
     Identity, inner, dx, ds, sym, grad, div, lhs, rhs, dot, File, solve, assemble_system
 from mshr import Cylinder, generate_mesh
 import numpy as np

flow-over-heated-plate/solid-fenics/solid.py

@@ -3,10 +3,9 @@
 """
 
 from __future__ import print_function, division
-from fenics import Function, SubDomain, RectangleMesh, BoxMesh, FunctionSpace, VectorFunctionSpace, Point, \
-    Expression, Constant, DirichletBC, \
-    TrialFunction, TestFunction, File, solve, plot, lhs, rhs, grad, inner, dot, dx, ds, interpolate, project, \
-    near, MeshFunction, MPI
+from fenics import Function, SubDomain, RectangleMesh, FunctionSpace, VectorFunctionSpace, Point, \
+    Constant, DirichletBC, \
+    TrialFunction, TestFunction, File, solve, lhs, rhs, grad, inner, dot, dx, interpolate, near, MeshFunction, MPI
 from fenicsprecice import Adapter
 import numpy as np
 

flow-over-heated-plate/solid-fenicsx/solid.py

@@ -4,7 +4,7 @@
 from petsc4py import PETSc
 import ufl
 from dolfinx import fem, io, mesh as msh, default_scalar_type
-from dolfinx.fem.petsc import assemble_matrix, assemble_vector, apply_lifting, create_vector, set_bc, LinearProblem
+from dolfinx.fem.petsc import assemble_matrix, assemble_vector, apply_lifting, create_vector, set_bc
 from dolfinx.mesh import create_rectangle
 import basix
 from fenicsxprecice import Adapter, CouplingMesh

flow-over-heated-plate/solid-nutils/solid.py

@@ -4,7 +4,6 @@
 import treelog
 import numpy as np
 import precice
-from mpi4py import MPI
 
 
 def main():

partitioned-burgers-1d/neumann-surrogate/model.py

@@ -1,6 +1,5 @@
 import torch
 import torch.nn as nn
-import torch.nn.functional as F
 from torch.nn.utils import weight_norm
 
 

partitioned-burgers-1d/solver-scipy/solver.py

@@ -10,7 +10,6 @@
 # | bc_left |                          <u_interface>     |    <u_interface>                        | bc_right |
 """
 import numpy as np
-from scipy.integrate import solve_ivp
 from scipy.sparse import diags, identity
 from scipy.optimize import root
 import precice

partitioned-heat-conduction-3d/solver-fenicsx/problem_setup.py

@@ -2,11 +2,8 @@
 Problem setup for partitioned-heat-conduction/fenicsx tutorial
 """
 from dolfinx.io import gmsh as gmshio
-from dolfinx.mesh import DiagonalType, create_box
-import dolfinx.mesh
 from my_enums import DomainPart
 import numpy as np
-from mpi4py import MPI
 import gmsh
 
 

partitioned-heat-conduction-complex/solver-fenics/problem_setup.py

@@ -2,10 +2,9 @@
 Problem setup for HT fenics-fenics tutorial
 """
 
-from fenics import SubDomain, Point, RectangleMesh, near, Function, VectorFunctionSpace, Expression
+from fenics import SubDomain, Point, RectangleMesh, near
 from my_enums import DomainPart, ProblemType
 import mshr
-import numpy as np
 
 y_bottom, y_top = 0, 1
 x_left, x_right = 0, 2

partitioned-heat-conduction-overlap/solver-fenics/heat.py

@@ -23,15 +23,14 @@
 # The alternating Schwarz method is applied in the overlap domain where $x \in \left[1-\delta, 1+\delta\right]$.
 
 from __future__ import print_function, division
-from fenics import Function, FunctionSpace, Expression, Constant, DirichletBC, TrialFunction, TestFunction, File, solve, lhs, rhs, grad, inner, dot, dx, ds, interpolate
+from fenics import Function, FunctionSpace, Expression, Constant, DirichletBC, TrialFunction, TestFunction, File, solve, lhs, rhs, grad, dot, dx, interpolate
 from fenics import SubDomain, Point, RectangleMesh, near, Function, Expression
 from fenicsprecice import Adapter
 from errorcomputation import compute_errors
 import argparse
 import numpy as np
 from dolfin import dot
 from enum import Enum
-import sys
 
 
 class Participant(Enum):

partitioned-heat-conduction/solver-fenics/heatHigherOrder.py

@@ -32,7 +32,7 @@
 
 from __future__ import print_function, division
 from fenics import Function, FunctionSpace, Expression, Constant, DirichletBC, TrialFunction, TestFunction, \
-    File, solve, lhs, rhs, grad, inner, dot, dx, ds, interpolate, VectorFunctionSpace, MeshFunction, MPI, MixedElement, split, project
+    File, solve, lhs, rhs, grad, inner, dx, ds, interpolate, VectorFunctionSpace, MeshFunction, MPI, MixedElement, split, project
 from fenicsprecice import Adapter
 from errorcomputation import compute_errors
 from my_enums import ProblemType, DomainPart

partitioned-heat-conduction/solver-fenics/problem_setup.py

@@ -2,7 +2,7 @@
 Problem setup for partitioned-heat-conduction/fenics tutorial
 """
 
-from fenics import SubDomain, Point, RectangleMesh, near, Function, Expression
+from fenics import SubDomain, Point, RectangleMesh, near
 from my_enums import DomainPart
 
 

partitioned-heat-conduction/solver-fenics/utils/utils.py

@@ -6,7 +6,6 @@
 import numpy as np
 import scipy.interpolate as interpol
 from fenics import *
-from sympy import ccode, diff
 
 
 def b_splines(precice, degree, dt):

partitioned-heat-conduction/solver-fenicsx/heat.py

@@ -29,7 +29,7 @@
 import basix.ufl
 from petsc4py import PETSc
 import ufl
-from dolfinx import fem, io, mesh as msh, geometry
+from dolfinx import fem, io, geometry
 from dolfinx.fem.petsc import assemble_matrix, assemble_vector, apply_lifting, create_vector, set_bc
 import basix
 from fenicsxprecice import Adapter, CouplingMesh

partitioned-heat-conduction/solver-fenicsx/problem_setup.py

@@ -1,12 +1,11 @@
 """
 Problem setup for partitioned-heat-conduction/fenicsx tutorial
 """
-from dolfinx.mesh import DiagonalType, create_rectangle
+from dolfinx.mesh import create_rectangle
 import dolfinx.mesh
 import dolfinx.cpp
 from my_enums import DomainPart
 import numpy as np
-from mpi4py import MPI
 
 
 y_bottom, y_top = 0, 1

partitioned-pipe-multiscale/solver-fluid1d-nutils/Fluid1D.py

@@ -1,5 +1,4 @@
 import numpy as np
-import matplotlib.pyplot as plt
 import treelog
 import precice
 from nutils import mesh, function, solver, cli

perpendicular-flap/fluid-fake/fake.py

@@ -1,6 +1,5 @@
 from __future__ import division
 
-import argparse
 import numpy as np
 import precice
 

perpendicular-flap/solid-fenics/requirements-reference.txt

@@ -2,11 +2,10 @@
 # Reference only: run scripts keep using loose requirements.txt constraints.
 # Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
 # Source: perpendicular-flap/solid-fenics/requirements.txt
-# Generated: 2026-07-18T10:31:39Z
+# Generated: 2026-08-13T17:30:52Z
 
 fenicsprecice==2.3.0
 numpy==1.26.4
-matplotlib==3.11.1
 fenics-dijitso==2019.1.0
 fenics-ffc==2019.1.0.post0
 fenics-fiat==2019.1.0

perpendicular-flap/solid-fenics/requirements.txt

@@ -1,6 +1,5 @@
 fenicsprecice~=2.2
 numpy >1, <2
-matplotlib>=3,<4
 
 # Assuming FEniCS from ppa:fenics-packages/fenics was installed https://fenicsproject.org/download/archive/
 # Use --system-site-packages in venv

perpendicular-flap/solid-fenics/solid.py

@@ -7,12 +7,9 @@
 
 # Import required libs
 from fenics import Constant, Function, AutoSubDomain, RectangleMesh, VectorFunctionSpace, interpolate, \
-    TrialFunction, TestFunction, Point, Expression, DirichletBC, project, \
-    Identity, inner, dx, ds, sym, grad, div, lhs, rhs, dot, File, solve, assemble_system
+    TrialFunction, TestFunction, Point, Expression, DirichletBC, Identity, inner, dx, ds, sym, grad, div, lhs, rhs, dot, File, solve, assemble_system
 import numpy as np
-import matplotlib.pyplot as plt
 from fenicsprecice import Adapter
-from enum import Enum
 
 
 # define the two kinds of boundary: clamped and coupling Neumann Boundary

perpendicular-flap/solid-nutils/solid.py

@@ -1,6 +1,6 @@
 #! /usr/bin/env python3
 
-from nutils import mesh, function, solver, export, cli
+from nutils import mesh, function, solver, cli
 from nutils.expression_v2 import Namespace
 import numpy
 import treelog

tools/tests/metadata_parser/metdata.py

@@ -1,6 +1,6 @@
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import List, Tuple, Optional, Dict
+from typing import List, Tuple, Optional
 import glob
 import yaml
 import itertools

tools/tests/systemtests.py

@@ -4,7 +4,7 @@
 from systemtests.SystemtestArguments import SystemtestArguments
 from systemtests.Systemtest import Systemtest, GLOBAL_TIMEOUT, DEFAULT_FIELDCOMPARE_RTOL, display_systemtestresults_as_table
 from systemtests.TestSuite import TestSuites
-from metadata_parser.metdata import Tutorials, Case
+from metadata_parser.metdata import Tutorials
 import logging
 import time
 import os

tools/tests/systemtests/TestSuite.py

@@ -4,7 +4,6 @@
 from metadata_parser.metdata import (
     Tutorials,
     Tutorial,
-    Case,
     CaseCombination,
     ReferenceResult,
     Components,

turek-hron-fsi3/fluid-nutils/fluid.py

@@ -7,11 +7,10 @@
 from nutils import cli, export, function
 from nutils.mesh import gmsh
 from nutils.solver import System
-from nutils.SI import Length, Density, Viscosity, Velocity, Time, Stress, Acceleration
+from nutils.SI import Length, Density, Viscosity, Velocity, Time, Stress
 from nutils.expression_v2 import Namespace
 from collections import defaultdict, deque
 from dataclasses import dataclass
-from typing import Optional
 from pathlib import Path
 from itertools import count
 import treelog as log

turek-hron-fsi3/solid-nutils/solid.py

@@ -7,11 +7,10 @@
 from nutils import cli, export, function
 from nutils.mesh import gmsh
 from nutils.solver import System
-from nutils.SI import Length, Density, Viscosity, Velocity, Time, Stress, Acceleration, Pressure
+from nutils.SI import Length, Density, Time, Stress, Acceleration, Pressure
 from nutils.expression_v2 import Namespace
 from collections import defaultdict, deque
 from dataclasses import dataclass
-from typing import Optional
 from pathlib import Path
 from itertools import count
 import treelog as log

volume-coupled-diffusion/solver-fenics/requirements-reference.txt

@@ -2,10 +2,9 @@
 # Reference only: run scripts keep using loose requirements.txt constraints.
 # Generated by tools/releasing/update-requirements-reference.py — do not edit manually.
 # Source: volume-coupled-diffusion/solver-fenics/requirements.txt
-# Generated: 2026-07-18T10:31:39Z
+# Generated: 2026-08-13T17:30:54Z
 
 fenicsprecice==2.3.0
-numpy==1.26.4
 fenics-dijitso==2019.1.0
 fenics-ffc==2019.1.0.post0
 fenics-fiat==2019.1.0

volume-coupled-diffusion/solver-fenics/requirements.txt

@@ -1,9 +1,8 @@
 fenicsprecice~=2.0
-numpy >1, <2
 
 # Assuming FEniCS from ppa:fenics-packages/fenics was installed https://fenicsproject.org/download/archive/
 # Use --system-site-packages in venv
 fenics-dijitso~=2019.0
 fenics-ffc~=2019.0
 fenics-fiat~=2019.0
-fenics-ufl-legacy~=2022.0
+fenics-ufl-legacy~=2022.0

volume-coupled-diffusion/solver-fenics/volume-coupled-diffusion.py

@@ -1,7 +1,6 @@
 from fenics import Function, FunctionSpace, Expression, Constant, DirichletBC, TrialFunction, TestFunction, File, \
     solve, lhs, rhs, dx, UnitSquareMesh, SubDomain, inner, grad, MeshFunction, MPI, interpolate
 from fenicsprecice import Adapter
-import numpy as np
 import argparse
 
 

volume-coupled-flow/source-nutils/source.py

@@ -1,11 +1,9 @@
 #! /usr/bin/env python3
 
 
-from nutils import function, mesh, cli, solver, export
-import treelog as log
+from nutils import function, mesh, cli
 import numpy as np
 import precice
-from mpi4py import MPI
 
 
 def main():

water-hammer/solver-fluid1d-nutils/Fluid1D.py

@@ -1,5 +1,4 @@
 import numpy as np
-import matplotlib.pyplot as plt
 import treelog
 from nutils import mesh, function, solver, cli
 import precice