Calculate future bitcoin supply and inflation

bitcoin-inflation.py

# bitcoin-inflation.py
# based on: https://github.com/ndsvw/Bitcoin-Supply-Calculator/blob/master/btcsupply.py

def btc_supply_at_block(b):
    max_supply = 20999999.9769
    if b >= 33 * 210000:
        return max_supply, 1.0
    else:
        reward = 50e8
        supply = 0
        y = 210000  # halving every y blocks
        while b > y - 1:
            supply = supply + y * reward
            reward = int(reward / 2.0)
            b = b - y
        supply = supply + b * reward
        supply = (supply + reward) / 1e8
        pct_of_max = (supply / max_supply)
        return supply, pct_of_max

if __name__ == '__main__':    
    year = 2009
    inflation = 1
    for i in range(0, 50):
        epoch = i
        blocks = epoch * 210000
        if epoch == 0:
            year = 2009
            inflation = 1
        elif epoch == 1:
            year = 2012
            inflation = 1
        else:
            year += 4
            old_supply, _ = btc_supply_at_block(blocks-210000)
            new_supply, _ = btc_supply_at_block(blocks)
            inflation = round((((new_supply/old_supply)-1)/4), 8)
        supply, pct_of_max = btc_supply_at_block(blocks)
        print(f"EPOCH #{epoch+1:>2}: {blocks:>8} BLOCKS - {supply:>17.8f} BTC - {pct_of_max*100:>12.8f}% - YEAR {year} - {inflation*100:>10.6f}% INFLATION/YEAR")

example output: