human
Solve the following python programming problem given the following code:
def __init__(self, rh, **options) : 
    self.rh = rh 
    self.actor = rh.actor 
    self.df2sf = { 
        
} 
    self.all_fields = [] 
    self.list_fields = [] 
    self.detail_fields = [] 
    self.primary_keys = set ([]) 
    def addfield(sf) : 
        self.all_fields.append (sf) 
        self.list_fields.append (sf) 
        self.detail_fields.append (sf) 
if (not issubclass (rh.actor, frames.Frame)) : 
        self.collect_fields (self.list_fields, rh.get_list_layout ()) 
form = rh.actor.detail_layout 
    if form : 
        dh = form.get_layout_handle (settings.SITE.kernel.default_ui) 
        self.collect_fields (self.detail_fields, dh) 
form = rh.actor.insert_layout 
    if form : 
        dh = form.get_layout_handle (settings.SITE.kernel.default_ui) 
        self.collect_fields (self.detail_fields, dh) 
if (self.pk is not None) : 
        self.pk_index = 0 
        found = False 
        for fld in self.list_fields : 
            "
                Django's Field.__cmp__() does::
                
                  return cmp(self.creation_counter, other.creation_counter)
                  
                which causes an exception when trying to compare a field
                with an object of other type.
                " 
            if ((f.field.__class__ is self.pk.__class__) and (fld.field == self.pk)) : 
                found = True 
                break 
self.pk_index += fld.list_values_count 
if (not found) : 
            raise Exception (('Primary key %s not found in list_fields %s' % (self.pk, self.list_fields))) 
del self.df2sf 
    if rh.actor.editable : 
        addfield (DisabledFieldsStoreField (self)) 
addfield (DisabledActionsStoreField (self)) 
    if rh.actor.editable : 
        addfield (DisableEditingStoreField (self)) 
if (rh.actor.get_row_classes is not None) : 
        addfield (RowClassStoreField (self)) 
self.all_fields = ([f for f in self.all_fields if (not isinstance (f, VirtStoreField))] + [f for f in self.all_fields if isinstance (f, VirtStoreField)]) 
   ...

    
    

    Fix the buggy line: if ((f.field.__class__ is self.pk.__class__) and (fld.field == self.pk)) :
assistant
#Here is Python code to fix the buggy line: if ((f.

if ((fld.field.__class__ is self.pk.__class__) and (fld.field == self.pk)) :