Refactor dash_vtk.util to import vtkmodules instead of vtk (#21)

* Update vtk.py

* vtk -> vtkmodules import

* Fix vtk to 8.* in demos requirements.txt

* vtk==8.* -> vtk>=8.2.*

* Add vtk to root requirements.txt

* Add try-except for vtkmodules importing

* Relax requirements

* Relax base requirement

* Change circleci caching behavior

* Update requirements

* dash[dev] >= 1.15.0

* oops

* Add message about using vtkmodules

* Update pip version

Author: Xing Han Lu

.circleci/config.yml

@@ -12,7 +12,7 @@ jobs:
             - checkout
 
             - restore_cache:
-                key: deps1-{{ .Branch }}-{{ checksum "package.json" }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}
+                key: deps1-{{ .Branch }}-{{ checksum "package.json" }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}-{{ checksum "demos/requirements.txt" }}
 
             - run:
                 name: Create virtualenv
@@ -23,6 +23,7 @@ jobs:
                 name: Install requirements
                 command: |
                     . venv/bin/activate
+                    pip install --upgrade pip
                     pip install -r requirements.txt --quiet
                     pip install -r tests/requirements.txt --quiet
 
@@ -33,7 +34,7 @@ jobs:
                     npm i
 
             - save_cache:
-                key: deps1-{{ .Branch }}-{{ checksum "package.json" }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}
+                key: deps1-{{ .Branch }}-{{ checksum "package.json" }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}-{{ checksum "demos/requirements.txt" }}
                 paths:
                     - node_modules
 
@@ -57,7 +58,7 @@ jobs:
             - checkout
 
             - restore_cache:
-                key: deps1-{{ .Branch }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}
+                key: deps1-{{ .Branch }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}-{{ checksum "demos/requirements.txt" }}
 
             - run:
                 name: Create virtualenv
@@ -68,11 +69,12 @@ jobs:
                 name: Install requirements
                 command: |
                     . venv/bin/activate
+                    pip install --upgrade pip
                     pip install -r requirements.txt --quiet
                     pip install -r tests/requirements.txt --quiet
 
             - save_cache:
-                key: deps1-{{ .Branch }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}
+                key: deps1-{{ .Branch }}-{{ checksum "tests/requirements.txt" }}-{{ checksum "requirements.txt" }}-{{ checksum "demos/requirements.txt" }}
                 paths:
                     - "venv"
 

dash_vtk/utils/vtk.py

@@ -1,7 +1,13 @@
 import dash_vtk
-
-from vtk.util.numpy_support import vtk_to_numpy
-from vtk.vtkFiltersGeometry import vtkGeometryFilter
+try:
+    # v9 and above
+    from vtkmodules.util.numpy_support import vtk_to_numpy
+    from vtkmodules.vtkFiltersGeometry import vtkGeometryFilter
+except:
+    # v8.1.2 and below
+    print("Can't import vtkmodules. Falling back to importing vtk.")
+    from vtk.util.numpy_support import vtk_to_numpy
+    from vtk.vtkFiltersGeometry import vtkGeometryFilter
 
 # Numpy to JS TypedArray
 to_js_type = {

demos/pyvista-point-cloud/requirements.txt

@@ -2,3 +2,4 @@
 dash-vtk
 pyvista
 numpy
+vtk

requirements.txt

@@ -1,3 +1,4 @@
 # dash is required to call `build:py`
 dash[dev]>=1.15.0
--e .
+-e .
+vtk