Merge pull request #262 from campagnola/py26compat

Py26compat

.travis.yml

@@ -17,7 +17,7 @@ env:
     # Enable python 2 and python 3 builds
     # Note that the 2.6 build doesn't get flake8, and runs old versions of
     # Pyglet and GLFW to make sure we deal with those correctly
-    #- PYTHON=2.6 QT=pyqt TEST=standard
+    - PYTHON=2.6 QT=pyqt TEST=standard
     - PYTHON=2.7 QT=pyqt TEST=extra
     - PYTHON=2.7 QT=pyside TEST=standard
     - PYTHON=3.4 QT=pyqt TEST=standard
@@ -65,6 +65,11 @@ install:
     - pip install pytest-xdist # multi-thread py.test
     - pip install pytest-cov # add coverage stats
 
+    # required for example testing on python 2.6
+    - if [ "${PYTHON}" == "2.6" ]; then
+        pip install importlib;
+      fi;
+
     # Debugging helpers
     - uname -a
     - cat /etc/issue
@@ -132,7 +137,7 @@ script:
 
     # Run unit tests
     - start_test "unit tests";
-      PYTHONPATH=. py.test --cov pyqtgraph -n 4 -sv;
+      PYTHONPATH=. py.test --cov pyqtgraph -sv;
       check_output "unit tests";
     - echo "test script finished. Current directory:"
     - pwd

examples/test_examples.py

@@ -1,15 +1,20 @@
 from __future__ import print_function, division, absolute_import
 from pyqtgraph import Qt
-from examples import utils
-import importlib
+from . import utils
 import itertools
 import pytest
 
+# apparently importlib does not exist in python 2.6...
+try:
+    import importlib
+except ImportError:
+    # we are on python 2.6
+    print("If you want to test the examples, please install importlib from "
+          "pypi\n\npip install importlib\n\n")
+    pass
+
 files = utils.buildFileList(utils.examples)
-
 frontends = {Qt.PYQT4: False, Qt.PYSIDE: False}
-# frontends = {Qt.PYQT4: False, Qt.PYQT5: False, Qt.PYSIDE: False}
-
 # sort out which of the front ends are available
 for frontend in frontends.keys():
     try:
@@ -25,7 +30,7 @@ def test_examples(frontend, f):
     # Test the examples with all available front-ends
     print('frontend = %s. f = %s' % (frontend, f))
     if not frontends[frontend]:
-        pytest.skip('{} is not installed. Skipping tests'.format(frontend))
+        pytest.skip('%s is not installed. Skipping tests' % frontend)
     utils.testFile(f[0], f[1], utils.sys.executable, frontend)
 
 if __name__ == "__main__":

pyqtgraph/parametertree/SystemSolver.py

@@ -1,4 +1,4 @@
-from collections import OrderedDict
+from ..pgcollections import OrderedDict
 import numpy as np
 
 class SystemSolver(object):

pyqtgraph/tests/test_stability.py

@@ -34,7 +34,7 @@ itemTypes = [
 
 widgets = []
 items = []
-allWidgets = weakref.WeakSet()
+allWidgets = weakref.WeakKeyDictionary()
 
 
 def crashtest():
@@ -99,7 +99,7 @@ def createWidget():
     widget = randItem(widgetTypes)()
     widget.setWindowTitle(widget.__class__.__name__)
     widgets.append(widget)
-    allWidgets.add(widget)
+    allWidgets[widget] = 1
     p("    %s" % widget)
     return widget