docs: def search_configuration_files(findstr, replacestr = None):
      '''This function could be used to find and replace paths in the configuration files.
          At present, it only finds phrases.'''
  
      F = open(configurationFilesLocation, "r")
      lines = F.readlines()
      F.close()
      allerrors = {}
      alloutput = {}
  
      for line in lines:
          line = line.strip()
          if line:
              if line.endswith("generate_fragments.py"):
                  # Do not parse the Python script but check that it exists
                  if not(os.path.exists(line)):
                      allerrors[line] = "File/directory %s does not exist." % line
              else:
                  cmd = ["grep", "-n", "-i",  findstr, line]
                  output = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
                  errors = output[1]
                  output = output[0]
                  if errors:
                      errors = errors.strip()
                      allerrors[line] = errors
                  if output:
                      output = output.strip()
                      alloutput[line] = output.split("\n")
      return alloutput, allerrors