The following comment were executed:

pip install autopep8
autopep8 --in-place --max-line-length=150 -r .


Former-commit-id: 6576c198

Former-commit-id: 6c796423

Former-commit-id: 73fb5943

Former-commit-id: c3a3403c

Former-commit-id: 55cd2522

Rational copied from https://www.python.org/dev/peps/pep-0290/#testing-for-none

// -----------------
Since there is only one None object, equality can be tested with identity. Identity
tests are slightly faster than equality tests. Also, some object types may overload
comparison, so equality testing may be much slower.

Pattern:

if v == None  -->  if v is None:
if v != None  -->  if v is not None:
// -----------------


Former-commit-id: 48ab42f0

* Use spaces instead of tab
* Add missing new lines
* Remove trailing spaces
* Add missing spaces
* Remove redundant backslash between brackets


Former-commit-id: 697b15ab

Flake8 is a python source checker.

The initial configuration file adds exceptions for all errors, it will
iteratively be updated as the code is improved.

After installing flake8 with `pip install flake8`, the following shell
script was used to craft the list of exceptions:

  IFS=$'\n'
  for line in $(flake8 --exclude src/Admin/ . | cut -d":" -f4 | sort | uniq)
  do
     # Remove leading space
     line=$(echo $line | sed -e 's/^[ \t]*//')
     # Extract error code
     code=$(echo $line | cut -d" " -f1)
     echo "    # $line"
     echo "    $code,"
  done

Currently, `src/Admin/` is excluded.

Internally flake8 is wrapper around these tools:

* PyFlakes: analyzes programs and detects various errors. It works by
  parsing the source file, not importing it, so it is safe to use on
  modules with side effects. It’s also much faster.

* pycodestyle: a tool to check your Python code against some of the
  style conventions in PEP 8 (the style guide for python code).
  See https://www.python.org/dev/peps/pep-0008/

* Ned Batchelder’s McCabe script: check McCabe (or cyclomatic) complexity.
  See https://en.wikipedia.org/wiki/Cyclomatic_complexity.

To learn more about flake8. See http://flake8.pycqa.org/en/latest/


Former-commit-id: 6f028716

BUG: Fix VTK build using vtkExternalModuleMacros
Former-commit-id: e0952ffa

Former-commit-id: c9684717

Former-commit-id: 7bc77180

Former-commit-id: 33601115

Former-commit-id: 00f0fbbd

Former-commit-id: 222dd5da

This commit fixes the configuration and build of VTKWikiExamples as both a
VTK remote module and a stand-alone project. It ensure **first and follow-up
configurations** produce similar results and behave **identically**.

The build was broken following the introduction of
Kitware/VTK@e33b90d (ExternalModule: Improve target export to
allow build against external module).

The commit addresses the issue by introducing the WikiModuleConfig CMake
module responsible for:

* ensure module information are exported into `VTK_MODULES_DIR` by using
`vtk_module_export_info`.

* use `vtk_module_config` to ensure that variables like `VTK_LIBRARIES`
are set in the current scope when the project is build.


Former-commit-id: 766a0e16

Former-commit-id: f8a272fd

Former-commit-id: fc81491f

STYLE: Simplify top level cmakelists
Former-commit-id: 79652654

ENH: Report which Databases/SQL or Video examples are not built
Former-commit-id: d23e7365

ENH: Update minimum required version of CMake from 2.8.8 to 3.3
Former-commit-id: e94a30e1

COMP: Fix configure error when build against Qt4
Former-commit-id: db433d32

module.cmake: Update list based on output of WhatModulesVTK.py

Former-commit-id: 4914843a

COMP: Fix VisualizationAlgorithms/PlateVibration build on case sensitive system
Former-commit-id: 7c0b1379

Former-commit-id: 0d18dec4

Former-commit-id: 6a1ae9e7

The module has the "Legacy" prefix anticipating a module named
WikiModuleConfig will be added.


Former-commit-id: 252f1b51

Note that testing for VTK_BINARY_DIR or Module_WikiExamples are equivalent
since both evaluate to True when building the module from within VTK.


Former-commit-id: 1bee9a59

Report message are like the following:

```
-- VTKWikiExamples: Building VTKWikiExamples stand-alone
-- VTKWikiExamples: Building VTKWikiExamples stand-alone - yes
-- VTKWikiExamples: Setting executables prefix
-- VTKWikiExamples: Setting executables prefix - no
-- VTKWikiExamples: VTK VERSION: 8.1.0(OpenGL2)
[...]
```

or

```
[...]
-- VTKWikiExamples: Building VTKWikiExamples stand-alone
-- VTKWikiExamples: Building VTKWikiExamples stand-alone - no
-- VTKWikiExamples: Setting executables prefix
-- VTKWikiExamples: Setting executables prefix - yes [prefix: wiki]
[...]
```


Former-commit-id: 33514a73

The version now match the one used in VTK 8.1


Former-commit-id: 828be1bb

This commit fixes the following error:

```
[...]
-- Found Qt4: /home/jcfr/Support/qt-everywhere-opensource-build-4.8.7/bin/qmake (found version "4.8.7")
CMake Error at src/Cxx/Qt/CMakeLists.txt:64 (TARGET_LINK_LIBRARIES):
  Cannot specify link libraries for target "BorderWidgetQt" which is not
  built by this project.
[...]


Former-commit-id: e8c5d86a

Former-commit-id: 707e4dc3

Former-commit-id: deba7c26

The test label is already set in ExampleTesting CMake module.


Former-commit-id: e9339e03

Former-commit-id: 9b81b509

Former-commit-id: e94bd18f

Former-commit-id: a3dbaad5

Former-commit-id: a4d306f5

Former-commit-id: 1ef2284a

Implementing Bill's changes from the C++ version.

Former-commit-id: d92fe664

Former-commit-id: 515a7e60