old_contents: import inspect
  import os
  import re
  from FourmiCrawler.parsers.parser import Parser
  
  
  class SourceLoader:
      sources = []
  
      def __init__(self, rel_dir="FourmiCrawler/parsers"):
          path = os.path.dirname(os.path.abspath(__file__))
          path += "/" + rel_dir
          known_parser = set()
  
          for py in [f[:-3] for f in os.listdir(path) if f.endswith('.py') and f != '__init__.py']:
              mod = __import__('.'.join([rel_dir.replace("/", "."), py]), fromlist=[py])
              classes = [getattr(mod, x) for x in dir(mod) if inspect.isclass(getattr(mod, x))]
              for cls in classes:
                  if issubclass(cls, Parser) and cls not in known_parser:
                      self.sources.append(cls())  # [review] - Would we ever need arguments for the parsers?
                      known_parser.add(cls)
  
      def include(self, source_names):
          new = []
          for name in source_names:
              new.extend([src for src in self.sources if re.match(name, src.__class__.__name__)])
          self.sources = new
  
      def exclude(self, source_names):
          exclude = []
          for name in source_names:
             exclude.extend([src for src in self.sources if re.match(source_names,src.__class__.__name__)])
          self.sources = [src for src in self.sources if src not in exclude]
  
      def __str__(self):
          string = ""
          for src in self.sources:
              string += "Source: " + src.__class__.__name__
              string += " - "
              string +=  "URI: " + src.website + "\n"
          return string
new_contents: import inspect
  import os
  import re
  from FourmiCrawler.parsers.parser import Parser
  
  
  class SourceLoader:
      sources = []
  
      def __init__(self, rel_dir="FourmiCrawler/parsers"):
          path = os.path.dirname(os.path.abspath(__file__))
          path += "/" + rel_dir
          known_parser = set()
  
          for py in [f[:-3] for f in os.listdir(path) if f.endswith('.py') and f != '__init__.py']:
              mod = __import__('.'.join([rel_dir.replace("/", "."), py]), fromlist=[py])
              classes = [getattr(mod, x) for x in dir(mod) if inspect.isclass(getattr(mod, x))]
              for cls in classes:
                  if issubclass(cls, Parser) and cls not in known_parser:
                      self.sources.append(cls())  # [review] - Would we ever need arguments for the parsers?
                      known_parser.add(cls)
  
      def include(self, source_names):
          print source_names
          new = set()
          for name in source_names:
              new.update([src for src in self.sources if re.match(name, src.__class__.__name__)])
          self.sources = list(new)
  
      def exclude(self, source_names):
          exclude = []
          for name in source_names:
              exclude.extend([src for src in self.sources if re.match(name, src.__class__.__name__)])
          self.sources = [src for src in self.sources if src not in exclude]
  
      def __str__(self):
          string = ""
          for src in self.sources:
              string += "Source: " + src.__class__.__name__
              string += " - "
              string += "URI: " + src.website + "\n"
          return string
subject: Include and Exclude fix after testing