portrait plot bug fix in python 3 env (#582)

* make sure integer number used for reshape array, where python 3 returns integer/integer = float

* fix flake8 tests

* apply suggestion from @doutriaux1

* running tests one a t a time on travis or error logs are mangled

.travis.yml

@@ -29,7 +29,7 @@ script:
  - git clean -fd
  - source activate py3
  - python setup.py install
- - python run_tests.py -v2
+ - python run_tests.py -v2 -n1
  - source deactivate
 
 #after_success:

src/python/graphics/portraits.py

@@ -1939,7 +1939,7 @@ def set_colormap(self):
  92.9412,
  100)
 
- cols = MV2.reshape(cols, (len(cols) / 3, 3))
+ cols = MV2.reshape(cols, (len(cols) // 3, 3))
 
  for i in range(cols.shape[0]):
  co = self.x.getcolorcell(i)

tests/test_pmp_flake8.py

@@ -25,7 +25,7 @@ def testFlake8(self):
  print()
  print()
  cmd = "flake8 --show-source --statistics " +\
- "--ignore=F999,F405,E121,E123,E126,E226,E24,E704 " +\
+ "--ignore=F999,F405,E121,E123,E126,E226,E24,E704,W504 " +\
  "--max-line-length=120 %s --exclude %s" % (pth,nopth)
  P = subprocess.Popen(shlex.split(cmd),
  stdin=subprocess.PIPE,