using abc module (abstract base class) to check for proper implementation of the container classes

data/Container.py

@@ -13,7 +13,6 @@ import gui.container_widgets
 
 __author__ = 'markusro'
 
-# FIXME: why are the functions implemented again? Better to use function_library!!
 class Conductivity(BaseContainer):
     def __init__( self, plt_imag=None, plt_real=None, limits=None ):
         super(Conductivity, self).__init__(plt_real=plt_real, plt_imag=plt_imag, limits=limits)
@@ -27,6 +26,10 @@ class Conductivity(BaseContainer):
     def function(self, p ,x):
         return functions.cond_cmplx(p,x)
 
+    def start_parameter(self, pos):
+        cond_par = [0.0, 10**(pos.y()+pos.x())*2*np.pi, 1.0]
+        self.set_parameter(beta=cond_par)
+
 
 class PowerComplex(BaseContainer):
     def __init__( self, plt_real=None, plt_imag=None, limits=None ):
@@ -40,6 +43,10 @@ class PowerComplex(BaseContainer):
     def function( self, p, x ):
         return functions.power_cmplx(p, x)
 
+    def start_parameter(self, pos):
+        cond_par = [10**(pos.y()+pos.x())*2*np.pi, 1.0]
+        self.set_parameter(cond_par)
+
 
 class Static(BaseContainer):
     def __init__( self, plt_real=None, plt_imag=None, limits=None ):
@@ -53,6 +60,9 @@ class Static(BaseContainer):
     def function( self, p, x ):
         return functions.static_cmplx(p, x)
 
+    def start_parameter(self, position):
+        cond_par = [10**position.y()]
+        self.set_parameter(beta=cond_par)
 
 class Peak(BaseContainer):
     def __init__( self, id_num=None, plt_real=None, plt_imag=None, limits=None ):
@@ -69,6 +79,9 @@ class Peak(BaseContainer):
     def function( self, p, x ):
         return functions.hn(p, x)
 
+    def start_parameter(self, pos):
+        new_peak_beta0 = [2*10**pos.y(), 1/(2*np.pi*10**pos.x()), 1, 1]
+        self.set_parameter(beta=new_peak_beta0)
 
 class YAFF(BaseContainer):
     def __init__( self, plt_real=None, plt_imag=None, limits=None ):
@@ -107,3 +120,9 @@ class YAFF(BaseContainer):
         ya = self._libyaff.loss(p, x)
         cplx = np.array([ya.imag, ya.real])
         return cplx
+
+    def start_parameter(self, pos):
+        gg_y = 10**pos.y()*2
+        gg_x = 1/(10**pos.x()*2*np.pi)
+        yaff_par = [gg_y, gg_x, 20.0, 1.0, 0.5, gg_x/100, 1.0, 1.0]
+        self.set_parameter(yaff_par)

data/container_base.py

@@ -2,10 +2,15 @@ from PyQt4.QtCore import QObject, pyqtSignal, Qt, pyqtSlot
 from PyQt4.QtGui import QColor
 import numpy as np
 import pyqtgraph as pg
-
+import abc
 
 __author__ = 'markusro'
 
+class QABCMeta(abc.ABCMeta, QObject.__class__):
+    """
+    Allows us to use ABCMeta
+    """
+    pass
 
 class BaseContainer(QObject):
     """
@@ -14,6 +19,8 @@ class BaseContainer(QObject):
     Specific containers are implemented in  the container.py module.
 
     """
+    __metaclass__ = QABCMeta
+
     # TODO generalize the base class so that we can use plugins (self-contained fit functions)
     changedData = pyqtSignal()
     removeObj = pyqtSignal(QObject)
@@ -74,7 +81,6 @@ class BaseContainer(QObject):
         # self._func = self.functions.get_function(id)
         self._id_string = id
 
-
     @property
     def id_label( self ):
         return self._id_label
@@ -108,16 +114,16 @@ class BaseContainer(QObject):
         p = self.widget.getTable()  # TODO ugly ... should return self._beta etc ...?
         return p
 
-    def get_fixed( self ):
-        p = self.widget.fixedParameter()
-        return p
-
     def set_parameter( self, beta, sd_beta=None ):
         self._beta = beta
         self._sd_beta = sd_beta
         self.widget.update_table(beta, sd_beta)
         self.update_data()
 
+    def get_fixed( self ):
+        p = self.widget.fixedParameter()
+        return p
+
     def get_data( self ):
         return self._frequency, self._data
 
@@ -147,9 +153,14 @@ class BaseContainer(QObject):
         self.data_curve_real.setData(x=[np.nan], y=[np.nan])
         self.data_curve_imag.setData(x=[np.nan], y=[np.nan])
 
+    @abc.abstractmethod
+    def start_parameter(self, position):
+        raise NotImplementedError("This needs to be implemented in your subclass")
+
+    @abc.abstractmethod
     def function( self, p, x ):
         if self._abort:
             raise StopIteration
-        raise NotImplementedError, "This needs to be implemented in your subclass"
+        raise NotImplementedError("This needs to be implemented in your subclass")