import random
random.seed()
MAXINT = 100
def get_even_rand():
x = random.randint(0, MAXINT//2)
yield x*2
>>> print get_even_rand().next()
56
>>> print get_even_rand().next()
62
>>> print get_even_rand().next()
94
>>> print get_even_rand().next()
90
>>> print get_even_rand().next()
16
>>> 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'