QgsDistanceArea Class (PyQGIS)

Python 2.7.4 (default, Apr  6 2013, 19:54:46) [MSC v.1500 32 bit (Intel)] on zeito
## Type help(iface) for more info and list of methods.
help(QgsDistanceArea)
Help on class QgsDistanceArea in module qgis.core:

class QgsDistanceArea(sip.wrapper)
 |  QgsDistanceArea()
 |  QgsDistanceArea(QgsDistanceArea)
 |
 |  Method resolution order:
 |      QgsDistanceArea
 |      sip.wrapper
 |      sip.simplewrapper
 |      __builtin__.object
 |
 |  Methods defined here:
 |
 |  bearing(...)
 |      QgsDistanceArea.bearing(QgsPoint, QgsPoint) -> float
 |
 |  convertMeasurement(...)
 |      QgsDistanceArea.convertMeasurement(float, QGis.UnitType, QGis.UnitType, bool) -> (float, QGis.UnitType)
 |
 |  ellipsoid(...)
 |      QgsDistanceArea.ellipsoid() -> QString
 |
 |  ellipsoidInverseFlattening(...)
 |      QgsDistanceArea.ellipsoidInverseFlattening() -> float
 |
 |  ellipsoidSemiMajor(...)
 |      QgsDistanceArea.ellipsoidSemiMajor() -> float
 |
 |  ellipsoidSemiMinor(...)
 |      QgsDistanceArea.ellipsoidSemiMinor() -> float
 |
 |  ellipsoidalEnabled(...)
 |      QgsDistanceArea.ellipsoidalEnabled() -> bool
 |
 |  geographic(...)
 |      QgsDistanceArea.geographic() -> bool
 |
 |  measure(...)
 |      QgsDistanceArea.measure(QgsGeometry) -> float
 |
 |  measureLine(...)
 |      QgsDistanceArea.measureLine(list-of-QgsPoint) -> float
 |      QgsDistanceArea.measureLine(QgsPoint, QgsPoint) -> float
 |
 |  measurePerimeter(...)
 |      QgsDistanceArea.measurePerimeter(QgsGeometry) -> float
 |
 |  measurePolygon(...)
 |      QgsDistanceArea.measurePolygon(list-of-QgsPoint) -> float
 |
 |  setEllipsoid(...)
 |      QgsDistanceArea.setEllipsoid(QString) -> bool
 |      QgsDistanceArea.setEllipsoid(float, float) -> bool
 |
 |  setEllipsoidalMode(...)
 |      QgsDistanceArea.setEllipsoidalMode(bool)
 |
 |  setSourceAuthId(...)
 |      QgsDistanceArea.setSourceAuthId(QString)
 |
 |  setSourceCrs(...)
 |      QgsDistanceArea.setSourceCrs(int)
 |      QgsDistanceArea.setSourceCrs(QgsCoordinateReferenceSystem)
 |
 |  sourceCrs(...)
 |      QgsDistanceArea.sourceCrs() -> int
 |
 |  textUnit(...)
 |      QgsDistanceArea.textUnit(float, int, QGis.UnitType, bool, bool keepBaseUnit=False) -> QString
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors defined here:
 |
 |  __weakref__
 |      list of weak references to the object (if defined)
 |
 |  ----------------------------------------------------------------------
 |  Methods inherited from sip.simplewrapper:
 |
 |  __init__(...)
 |      x.__init__(...) initializes x; see help(type(x)) for signature
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from sip.simplewrapper:
 |
 |  __dict__
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes inherited from sip.simplewrapper:
 |
 |  __new__ = <built-in method __new__ of sip.wrappertype object>
 |      T.__new__(S, ...) -> a new object with type S, a subtype of T