old_contents: import re
  
  class Phage:
    supported_databases = {
      # European Nucleotide Archive phage database
      "ENA": "^gi\|[0-9]+\|ref\|([^\|]+)\|\ ([^,]+)[^$]*$",
  
      # National Center for Biotechnology Information phage database
      "NCBI": "^ENA\|([^\|]+)\|[^\ ]+\ ([^,]+)[^$]*$",
  
      # Actinobacteriophage Database
      "AD": "^([^\ ]+)\ [^,]*,[^,]*,\ Cluster\ ([^$]+)$"
    }
    
  
    def __init__(self, raw_text, phage_finder):
      self.raw = raw_text.strip()
      self.refseq = None
      self.name = None
      self.db = None
      self._parsePhage(raw_text, phage_finder)
  
  
    def _parsePhage(self, raw_text, phage_finder):
      for db, regex in Phage.supported_databases.items():
        match = re.search(regex, raw_text)
        if match is not None:
          if db is not "AD":
            self.name = match.group(2)
            self.refseq = match.group(1)
          else:
            short_name = match.group(1)
            cluster = match.group(2)
            self.name = "Mycobacteriophage " + short_name
            self.refseq = phage_finder.findByPhage(short_name, cluster)
          self.db = db
new_contents: import re
  
  class Phage:
    supported_databases = {
      # European Nucleotide Archive phage database
      "ENA": r"^gi\|[0-9]+\|ref\|([^\|]+)\|\ ([^,]+)[^$]*$",
  
      # National Center for Biotechnology Information phage database
      "NCBI": r"^ENA\|([^\|]+)\|[^\ ]+\ ([^,]+)[^$]*$",
  
      # Actinobacteriophage Database
      "AD": r"^([^\ ]+)\ [^,]*,[^,]*,\ Cluster\ ([^$]+)$"
    }
    
  
    def __init__(self, raw_text, phage_finder):
      self.raw = raw_text.strip()
      self.refseq = None
      self.name = None
      self.db = None
      self._parsePhage(raw_text, phage_finder)
  
  
    def _parsePhage(self, raw_text, phage_finder):
      for db, regex in Phage.supported_databases.items():
        match = re.search(regex, raw_text)
        if match is not None:
          if db is not "AD":
            self.name = match.group(2)
            self.refseq = match.group(1)
          else:
            short_name = match.group(1)
            cluster = match.group(2)
            self.name = "Mycobacteriophage " + short_name
            self.refseq = phage_finder.findByPhage(short_name, cluster)
          self.db = db
  
subject: Use raw strings for regexes.