code: def convert_readme_to_rst():
      
      project_files = os.listdir('.')
      for filename in project_files:
          if filename.lower() == 'readme':
              raise ProjectError(
                  'found {} in project directory...'.format(filename) +
                  'not sure what to do with it, refusing to convert'
              )
          elif filename.lower() == 'readme.rst':
              raise ProjectError(
                  'found {} in project directory...'.format(filename) +
                  'refusing to overwrite'
              )
      for filename in project_files:
          if filename.lower() == 'readme.md':
              rst_filename = 'README.rst'
              logger.info('converting {} to {}'.format(filename, rst_filename))
              try:
                  rst_content = pypandoc.convert(filename, 'rst')
                  with open('README.rst', 'w') as rst_file:
                      rst_file.write(rst_content)
                  return
              except OSError as e:
                  raise ProjectError(
                      'could not convert readme to rst due to pypandoc error:' + os.linesep + str(e)
                  )
      raise ProjectError('could not find any README.md file to convert')
docs: Attempt to convert a README.md file into README.rst