code: def _builder_reprs(cls, options, namespace=None, ns=None):
          
          if isinstance(options, basestring):
              from .parser import OptsSpec
              if ns is None:
                  try:     ns = get_ipython().user_ns  # noqa
                  except:  ns = globals()
              options = options.replace('%%opts','').replace('%opts','')
              options = OptsSpec.parse_options(options, ns=ns)
  
  
          reprs = []
          ns = '{namespace}.'.format(namespace=namespace) if namespace else ''
          for option in options:
              kws = ', '.join('%s=%r' % (k,option.kwargs[k]) for k in sorted(option.kwargs))
              if '.' in option.key:
                  element = option.key.split('.')[0]
                  spec = repr('.'.join(option.key.split('.')[1:])) + ', '
              else:
                  element = option.key
                  spec = ''
  
              opts_format = '{ns}opts.{element}({spec}{kws})'
              reprs.append(opts_format.format(ns=ns, spec=spec, kws=kws, element=element))
          return reprs
docs: Given a list of Option objects (such as those returned from
          OptsSpec.parse_options) or an %opts or %%opts magic string,
          return a list of corresponding option builder reprs. The
          namespace is typically given as 'hv' if fully qualified
          namespaces are desired.