PR: Add QtCharts alias for backward compatibility with 1.x

qtpy/__init__.py

@@ -211,6 +211,13 @@ class PythonQtWarning(Warning):
 except (ImportError, PythonQtError):
     pass
 
+try:
+    # QtCharts backward compatibility with QtPy 1.x
+    from . import QtCharts
+    QtCharts.QtCharts = QtCharts
+except (ImportError, PythonQtError):
+    pass
+
 
 def _warn_old_minor_version(name, old_version, min_version):
     """Warn if using a Qt or binding version no longer supported by QtPy."""

qtpy/tests/test_qtcharts.py

@@ -8,3 +8,4 @@ def test_qtcharts():
     """Test the qtpy.QtCharts namespace"""
     from qtpy import QtCharts
     assert QtCharts.QChart is not None
+    assert QtCharts.QtCharts.QChart is not None