old_contents: # Wolfram Alpha (Maths)
  #
  # @website     http://www.wolframalpha.com
  # @provide-api yes (http://api.wolframalpha.com/v2/)
  #
  # @using-api   yes
  # @results     XML
  # @stable      yes
  # @parse       result
  
  from urllib import urlencode
  from lxml import etree
  from searx.engines.xpath import extract_text
  from searx.utils import html_to_text
  
  # search-url
  base_url = 'http://api.wolframalpha.com/v2/query'
  search_url = base_url + '?appid={api_key}&{query}&format=plaintext'
  site_url = 'http://wolframalpha.com/input/?{query}'
  
  # do search-request
  def request(query, params):
      params['url'] = search_url.format(query=urlencode({'input': query}),
                                        api_key=api_key)
  
      # need this for url in response
      global my_query
      my_query = query
  
      return params
  
  # replace private user area characters to make text legible
  def replace_pua_chars(text):
      pua_chars = { u'\uf74c': 'd',
                    u'\uf74d': u'\u212f',
                    u'\uf74e': 'i',
                    u'\uf7d9': '=' }
  
      for k, v in pua_chars.iteritems():
          text = text.replace(k, v)
  
      return text
  
  # get response from search-request
  def response(resp):
      results = []
  
      search_results = etree.XML(resp.content)
  
      # return empty array if there are no results
      if search_results.xpath('/queryresult[attribute::success="false"]'):
          return []
  
      # parse result
      result = search_results.xpath('//pod[attribute::primary="true"]/subpod/plaintext')[0].text
      result = replace_pua_chars(result)
  
      # bind url from site
      result_url = site_url.format(query=urlencode({'i': my_query}))
  
      # append result
      # TODO: shouldn't it bind the source too?
      results.append({'url': result_url,
                      'answer': result})
  
      # return results
      return results
  
new_contents: # Wolfram Alpha (Maths)
  #
  # @website     http://www.wolframalpha.com
  # @provide-api yes (http://api.wolframalpha.com/v2/)
  #
  # @using-api   yes
  # @results     XML
  # @stable      yes
  # @parse       result
  
  from urllib import urlencode
  from lxml import etree
  from searx.engines.xpath import extract_text
  from searx.utils import html_to_text
  
  # search-url
  base_url = 'http://api.wolframalpha.com/v2/query'
  search_url = base_url + '?appid={api_key}&{query}&format=plaintext'
  api_key = ''
  
  
  # do search-request
  def request(query, params):
      params['url'] = search_url.format(query=urlencode({'input': query}),
                                        api_key=api_key)
  
      return params
  
  
  # replace private user area characters to make text legible
  def replace_pua_chars(text):
      pua_chars = {u'\uf74c': 'd',
                   u'\uf74d': u'\u212f',
                   u'\uf74e': 'i',
                   u'\uf7d9': '='}
  
      for k, v in pua_chars.iteritems():
          text = text.replace(k, v)
  
      return text
  
  
  # get response from search-request
  def response(resp):
      results = []
  
      search_results = etree.XML(resp.content)
  
      # return empty array if there are no results
      if search_results.xpath('/queryresult[attribute::success="false"]'):
          return []
  
      # parse result
      result = search_results.xpath('//pod[attribute::primary="true"]/subpod/plaintext')[0].text
      result = replace_pua_chars(result)
  
      # append result
      # TODO: shouldn't it bind the source too?
      results.append({'answer': result})
  
      # return results
      return results
  
subject: Fix Travis errors.