better with constructor param

pisi/db/componentdb.py

@@ -25,9 +25,10 @@ import pisi.db.lazydb as lazydb
 
 class ComponentDB(lazydb.LazyDB):
 
-    def init(self):
-        self.cacheable = True
+    def __init__(self):
+        lazydb.LazyDB.__init__(self, cacheable=True)
 
+    def init(self):
         component_nodes = {}
         component_packages = {}
         component_sources = {}

pisi/db/lazydb.py

@@ -22,15 +22,16 @@ class Singleton(object):
         return type._the_instance
 
 class LazyDB(Singleton):
-    def __init__(self):
+    def __init__(self, cacheable=False):
         if not self.__dict__.has_key("initialized"):
             self.initialized = False
+        self.cacheable = cacheable
 
     def is_initialized(self):
         return self.initialized
 
     def cache_save(self):
-        if os.access("/var/cache/pisi", os.W_OK) and self.__class__._the_instance.__dict__.has_key("cacheable"):
+        if os.access("/var/cache/pisi", os.W_OK) and self.cacheable:
             cPickle.dump(self.__class__._the_instance.__dict__,
                          file('/var/cache/pisi/%s.cache' % self.__class__.__name__.lower(), 'wb'), 1)
 

pisi/db/packagedb.py

@@ -35,9 +35,10 @@ import pisi.db.lazydb as lazydb
 
 class PackageDB(lazydb.LazyDB):
 
-    def init(self):
-        self.cacheable = True
+    def __init__(self):
+        lazydb.LazyDB.__init__(self, cacheable=True)
 
+    def init(self):
         self.__package_nodes = {} # Packages
         self.__revdeps = {}       # Reverse dependencies
         self.__obsoletes = {}     # Obsoletes

pisi/db/sourcedb.py

@@ -24,9 +24,10 @@ import pisi.db.lazydb as lazydb
 
 class SourceDB(lazydb.LazyDB):
 
-    def init(self):
-        self.cacheable = True
+    def __init__(self):
+        lazydb.LazyDB.__init__(self, cacheable=True)
 
+    def init(self):
         self.__source_nodes = {}
         self.__pkgstosrc = {}
         self.__revdeps = {}