Script to get block distribution over last 'x' blocks on Bitcoin clone

lastblocks.py

import bitcoin.rpc
import sys
import binascii
import bitcoin.core
import matplotlib.pyplot as plt
import datetime

# Setup proxy for communicating with daemon
rpc = bitcoin.rpc.Proxy(btc_conf_file="YOUR_CONF_FILE_LOCATION_HERE")

# Get current block height 
height = int(rpc.getinfo()['blocks'])
print("Current height is: {0}".format(height))

# Create set of lists for storing data
blockrange = int(sys.argv[1])
blocks = range(height-blockrange, height+1)
blockhashes = []
addresses = []
addresscounts = []

for i in blocks:
    blockhash = rpc.getblockhash(i)
    blockhashes.append(blockhash)
    block = rpc.getblock(blockhash)
    tx = bitcoin.core.b2lx(block.vtx[0].GetHash())
    hextx = rpc._call('getrawtransaction', tx)
    address = rpc._call('decoderawtransaction',
        hextx)['vout'][0]['scriptPubKey']['addresses']
    amount = rpc._call('decoderawtransaction',
        hextx)['vout'][0]['value']
    # print(i, address, amount)
    if float(amount) < 50:
        addresses.append('p2pool')
    elif "Vhe4y3qia" in address[0]:
        addresses.append("GiveMeCoins")
    elif "VqspNKCc3" in address[0]:
        addresses.append("MiningPoolHub")
    elif "VeA2dmBhJ" in address[0]:
        addresses.append("AikaPool")
    elif "VuPp8H4W3" in address[0]:
        addresses.append("Coinotron")
    else:
        addresses.append(address[0])

# print(addresses)
uniqueaddresses = list(set(addresses))
explode=[]
for i in uniqueaddresses:
    addresscounts.append(addresses.count(i))
    explode.append(0.05)
    print(i, addresses.count(i))

colors = ('b', 'g', 'r', 'c', 'm', 'y', 'w')
ax1 = plt.axes([0.25, 0.2, 0.5, 0.5])
pie_wedge_collection = ax1.pie(
        addresscounts,
        labels=uniqueaddresses,
        labeldistance=1.07,
        explode=explode,
        autopct='%1.1f%%',
        shadow=True,
        startangle=90,
        colors=colors
)
for pie_wedge in pie_wedge_collection[0]:
    pie_wedge.set_edgecolor('0.3')
for i in pie_wedge_collection[1]:
    i.set_fontsize('xx-small')
for i in pie_wedge_collection[2]:
    i.set_fontsize('xx-small')
plt.title("Vertcoin network snapshot of the last {0:.0f} blocks\nRecorded at block # {1} and time {2} UTC".format(
    blockrange, height, datetime.datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")))
plt.savefig('vtcpools.png', dpi=300)
plt.close()