Python script to get the bitcoin block chain.

blockchain_data.py

import urllib, json, time

url = "http://blockchain.info/rawblock/"
hash = "0000000000000000d621e4c3182eb6015369fc156d5ce28e0b929da54d1c745a" 
for _ in range(20):
    r = urllib.urlopen(url+hash) 
    data = json.loads(r.read()) 
    index = str(data["block_index"])
    hash = str(data["prev_block"]) 
    open("chain/"+index+".txt", "w").write(str(data)) 
    print index
    time.sleep(1)