convert binary file //headers.electrum.org/blockchain_headers to CSV ASCII

blockchain_headers_to_csv.py

#!/usr/bin/env python
# convert binary file http://headers.electrum.org/blockchain_headers 
# to CSV ASCII

import binascii

STRUCT_OF_BLOCK = [ 4, 32, 32, 4, 4, 4 ] # blockchain_headers does not contain always "0x00" txn_count
BLOCK_SIZE = sum(STRUCT_OF_BLOCK)

FILE_OUT= open('blockchain_headers.csv','w')

FILE_OUT.write( "version,prev_block,merkle_root,timestamp,bits,nonce,txn_count\n" )

with open('blockchain_headers','rb') as FILE:
	block = FILE.read(BLOCK_SIZE)
	while block != b'':
		position = 0
		for i in STRUCT_OF_BLOCK:
			FILE_OUT.write( bytearray(binascii.hexlify( block[position:(position+i)][::-1] )).decode('ascii') + ',')
			position += i
			if position >= BLOCK_SIZE:
				FILE_OUT.write("00\n") # blockchain_headers does not contain always "0x00" txn_count
		block = FILE.read(BLOCK_SIZE)