>>> import json
>>> a = json.loads('ваша строка')
>>> res = filter(lambda x: x['algo']==20, a['result']['stats'])
>>> res
[{u'profitability_above_eth': u'16.42', u'price': u'0.0353', u'speed': u'250.11615500', u'algo': 20, u'profitability_eth': u'0.0303'}]
>>> res[0]['algo']
20
>>> res[0]['speed']
u'250.11615500'
>>> res[0]['price']
u'0.0353'
>>> from lxml import etree
>>> str1 = '<li id="result_1418" data-asin="B01CZ654Q6" class="s-result-item s-result-card-for-container s-carded-grid celwidget "></li>'
>>> elem = etree.fromstring(str1)
>>> elem.get('data-asin')
'B01CZ654Q6
pip install <имя скачанного проекта>