Creates an expression that looks up a property.
The object to use is found by evaluating the expression, or using the this argument when expression is NULL.
If the resulting object conforms to this_type, its property specified by pspec will be queried. Otherwise, this expression's evaluation will fail.
Expression to evaluate to get the object to query or NULL to query the this object
the gobject.param_spec.ParamSpec for the property to query
a new gtk.expression.Expression
Creates an expression that looks up a property.
The object to use is found by evaluating the expression, or using the this argument when expression is NULL.
If the resulting object conforms to this_type, its property specified by pspec will be queried. Otherwise, this expression's evaluation will fail.