old_contents: import os
  from fnmatch import fnmatch
  import ntpath
  import pkg_resources
  
  ## indexes a directory of stan files
  ## returns as dictionary containing contents of files
  
  def _list_files_in_path(path, pattern = "*.stan"):
      results = []
      for dirname, subdirs, files in os.walk(path):
          for name in files:
              if fnmatch(name, pattern):
                  results.append(os.path.join(dirname, name))
      return(results)
  
  def _read_file(filepath, resource = None):
      print(filepath)
      if not(resource):
          with open(filepath, 'r') as myfile:
              data=myfile.read()
      else:
          data = pkg_resources.resource_string(
              resource, filepath)
      return data
  
  def read_files(path, pattern, encoding="utf-8", resource = None):
      files = _list_files_in_path(path = path, pattern=pattern)
      results = {}
      for file in files:
          file_data = {}
          file_data['path'] = file
          file_data['basename'] = ntpath.basename(file)
          file_data['code'] = _read_file(file, resource = resource).decode(encoding)
          results[file_data['basename']] = file_data['code']
      return(results)
  
  
  
new_contents: import os
  from fnmatch import fnmatch
  import ntpath
  import pkg_resources
  
  ## indexes a directory of stan files
  ## returns as dictionary containing contents of files
  
  def _list_files_in_path(path, pattern = "*.stan"):
      results = []
      for dirname, subdirs, files in os.walk(path):
          for name in files:
              if fnmatch(name, pattern):
                  results.append(os.path.join(dirname, name))
      return(results)
  
  def _read_file(filepath, resource = None):
      print(filepath)
      if not(resource):
          with open(filepath, 'r') as myfile:
              data=myfile.read()
      else:
          data = pkg_resources.resource_string(
              resource, filepath)
      return data
  
  def read_files(path, pattern = '*.stan', encoding="utf-8", resource = None):
      files = _list_files_in_path(path = path, pattern=pattern)
      results = {}
      for file in files:
          file_data = {}
          file_data['path'] = file
          file_data['basename'] = ntpath.basename(file)
          file_data['code'] = _read_file(file, resource = resource).decode(encoding)
          results[file_data['basename']] = file_data['code']
      return(results)
  
  
  
subject: change default for read_files to look for stan suffix