Refractoring double code

FourmiCrawler/sources/ChemSpider.py

@@ -28,10 +28,6 @@ class ChemSpider(Source):
 
     def __init__(self, config=None):
         Source.__init__(self, config)
-        if self.cfg is None:
-            self.cfg = {}
-        else:
-            self.cfg = config
         self.ignore_list = []
         if 'token' not in self.cfg or self.cfg['token'] == '':
             log.msg('ChemSpider token not set or empty, search/MassSpec API '

FourmiCrawler/sources/NIST.py

@@ -25,10 +25,6 @@ class NIST(Source):
     def __init__(self, config=None):
         Source.__init__(self, config)
         self.ignore_list = set()
-        if config is None:
-            self.cfg = {}
-        else:
-            self.cfg = config
 
     def parse(self, response):
         sel = Selector(response)

FourmiCrawler/sources/WikipediaParser.py

@@ -21,10 +21,6 @@ class WikipediaParser(Source):
 
     def __init__(self, config=None):
         Source.__init__(self, config)
-        if config is None:
-            self.cfg = {}
-        else:
-            self.cfg = config
 
     def parse(self, response):
         """

FourmiCrawler/sources/source.py

@@ -10,6 +10,9 @@ class Source:
         """
         Initiation of a new Source
         """
+        self.cfg = {}
+        if config is not None:
+            self.cfg = config
         pass
 
     def parse(self, response):