How to get path of an element in lxml?

I'm searching in a HTML document using XPath from lxml in python. How can I get the path to a certain element? Here's the example from ruby nokogiri:

page.xpath('//text()').each do |textnode|
    path = textnode.path
    puts path
end

print for example '/html/body/div/div[1]/div[1]/p/text()[1]' and this is the string I want to get in python.