code: def check_name(name, safe_chars):
      '''
      Check whether the specified name contains invalid characters
      '''
      regexp = re.compile('[^{0}]'.format(safe_chars))
      if regexp.search(name):
          raise SaltCloudException(
              '{0} contains characters not supported by this cloud provider. '
              'Valid characters are: {1}'.format(
                  name, safe_chars
              )
          f check_name(name, safe_chars):
      '''
      Check whether the specified name contains invalid characters
      '''
      regexp = re.compile('[^{0}]'.format(safe_chars))
      if regexp.search(name):
          raise SaltCloudException(
              '{0} contains characters not supported by this cloud provider. '
              'Valid characters are: {1}'.format(
                  name, safe_chars
              )
          )
docs: Check whether the specified name contains invalid characters