code.py

#!/usr/bin/env python3

import sys
if sys.version_info.major < 3:
    sys.stderr.write('Sorry, Python 3.x required by this example.\n')
    sys.exit(1)

import requests

import bitcoin
import bitcoin.rpc

print("This program is calculating how many transactions disappeared after the \
Bitcoin-fork on 2015-07-05 21:14:14 \
see also: \
https://blockchain.info/orphaned-blocks?offset=300 \
https://www.heise.de/ct/ausgabe/2018-8-Wie-abgeschlossene-Transaktionen-aus-der-Blockchain-verschwinden-4004027.html ")

proxy = bitcoin.rpc.RawProxy()

block = proxy.getblock(proxy.getblockhash(363997))
print("Number of transaction in 363997 : " + str(len(block["tx"])))
oktxs=["test"]
for tx in block["tx"]:
    oktxs.append(tx)

block = proxy.getblock(proxy.getblockhash(363998))
print("Number of transaction in 363998 : " +str(len(block["tx"])))
for tx in block["tx"]:
    oktxs.append(tx)

block = proxy.getblock(proxy.getblockhash(363999))
print("Number of transaction in 363999 : " +str(len(block["tx"])))
for tx in block["tx"]:
    oktxs.append(tx)

in_tx=0
out_tx = 0


resp = requests.get(url="https://blockchain.info/rawblock/000000000000000003ae1223f4926ec86100885cfe1484dc52fd67e042a19b12")
txs = resp.json()["tx"]
for tx in txs:
    if tx["hash"] in oktxs:
        in_tx=in_tx+1
    else:
        out_tx = out_tx +1

resp = requests.get(url="https://blockchain.info/rawblock/00000000000000000063f97f292fb559773437fb3558c474efec6053a7b0d5a2")
txs = resp.json()["tx"]
for tx in txs:
    if tx["hash"] in oktxs:
        in_tx=in_tx+1
    else:
        out_tx = out_tx +1

resp = requests.get(url="https://blockchain.info/rawblock/000000000000000012dbd422d7bf1c4b55982c37b390d4613dcee00d31741c6a")
txs = resp.json()["tx"]
for tx in txs:
    if tx["hash"] in oktxs:
        in_tx=in_tx+1
    else:
        out_tx = out_tx +1



print("in_tx (transactions which were also on the other fork):"+ str(in_tx))
print("out_tx (transactions which were also on the other fork):"+ str(out_tx))

print("sum of tranactions on the wrong fork:"+ str(in_tx + out_tx) )

print("therefore the percentage of tranactions suffering: %"+str(out_tx / (in_tx + out_tx) * 100) )

output

This program is calculating how many transactions disappeared after the
 Bitcoin-fork on 2015-07-05 21:14:14
 see also:
 https://blockchain.info/orphaned-blocks?offset=300
 https://www.heise.de/ct/ausgabe/2018-8-Wie-abgeschlossene-Transaktionen-aus-der-Blockchain-verschwinden-4004027.html


Number of transaction in 363997 : 1142
Number of transaction in 363998 : 2315
Number of transaction in 363999 : 1599
in_tx (transactions which were also on the other fork):1689
out_tx (transactions which were also on the other fork):166
sum of tranactions on the wrong fork:1855
therefore the percentage of tranactions suffering: %8.94878706199461