Pythonで仮想通貨の市場データをAPIスクレイピングする方法

import argparse
import requests
import pandas as pd

BASE_URL = "https://api.coingecko.com/api/v3"

def get_crypto_list():
    url = f"{BASE_URL}/coins/list"
    response = requests.get(url)
    data = response.json()

    crypto_names = [crypto['id'] for crypto in data]
    return crypto_names

def is_valid_crypto(crypto_name, crypto_list):
    return crypto_name in crypto_list

def get_matching_cryptos(crypto_name, crypto_list):
    first_letter = crypto_name[0]
    matching_cryptos = [name for name in crypto_list if name.startswith(first_letter)]
    return matching_cryptos

def get_crypto_data(crypto_name):
    url = f"{BASE_URL}/coins/{crypto_name}/market_chart"
    parameters = {
        'vs_currency': 'jpy',
        'days': 'max'
    }
    response = requests.get(url, params=parameters)
    data = response.json()
    
    df_prices = pd.DataFrame(data['prices'], columns=['time', 'price'])
    df_market_caps = pd.DataFrame(data['market_caps'], columns=['time', 'market_cap'])
    df_total_volumes = pd.DataFrame(data['total_volumes'], columns=['time', 'total_volume'])
    
    df = pd.merge(df_prices, df_market_caps, on='time')
    df = pd.merge(df, df_total_volumes, on='time')

    df['time'] = pd.to_datetime(df['time'], unit='ms')
    
    return df

def main():
    parser = argparse.ArgumentParser(description='特定の仮想通貨の市場データを取得します。')
    parser.add_argument('crypto_name', type=str, help='仮想通貨の名前')
    args = parser.parse_args()

    crypto_list = get_crypto_list()

    if not is_valid_crypto(args.crypto_name, crypto_list):
        print(f"仮想通貨名 {args.crypto_name} は無効です。以下の有効な仮想通貨名を参考にしてください：")
        matching_cryptos = get_matching_cryptos(args.crypto_name, crypto_list)
        print(", ".join(matching_cryptos))
        return

    try:
        df = get_crypto_data(args.crypto_name)
        df.to_csv(f'{args.crypto_name}_prices.csv', index=False)
        print(f"データを {args.crypto_name}_prices.csv に保存しました")
    except Exception as e:
        print(f"エラーが発生しました: {str(e)}")

if __name__ == "__main__":
    main()

pip install argparse requests pandas

> py .\get_crypto_market_data.py bitcoin
データを bitcoin_prices.csv に保存しました

> py .\get_crypto_market_data.py bitcoinxxxxx
仮想通貨名 bitcoinxxxxx は無効です。以下の有効な仮想通貨名を参考にしてください：
b20, baanx, baasid, babacoin, babb, baby-alvey, babyama, baby-aptos, baby-arbitrum, baby-bali, baby-bitcoin, babybnbtiger, babyboo, babydoge2-0, babydogearmy, baby-doge-cash, baby-doge-ceo, babydoge-ceo, baby-doge-coin, babydoge-coin-eth, baby-doge-inu, babydot, babyfloki, baby-floki, baby-floki-coin, baby-floki-inu, baby-g, babykitty, baby-lambo-inu, babylon-finance, babylons, baby-lovely-inu, baby-moon-floki, babypepe, baby-pepe, babypepeentire, babyrabbit, baby-richard-heart, baby-saitama, baby-samo-coin, baby-shark, baby-shark-tank, baby-shiba-coin, baby-shiba-inu, babyswap, babywhale, baby-woj, babyxrp, bacondao, badger-dao, badger-sett-badger, bad-idea-ai, bafi-finance-token, bagholder, bai-stablecoin, baked-token, bakerytoken, bakerytools, baklava, balanced-dollars, balance-network, balancer, balancer-80-bal-20-weth, balancer-aave-boosted-wmatic, balancer-boosted-aave-dai, balancer-boosted-aave-usdc, balancer-boosted-aave-usdt, balancer-boosted-aave-weth, balancer-maticx-boosted-aave-wmatic, balance-tokens, bali-token, bali-united-fc-fan-token, ball-coin, balloonsville-air, ballswap, ball-token, balpha, balto-token, bambi, bamboo-coin, bamboo-defi, bamboo-token-c90b31ff-8355-41d6-a495-2b16418524c2, banana, bananace, bananaclubtoken, banana-coin, bananatok, banana-token, banano, bancor, bancor-governance-token, band-protocol, bandzai-token, bankbrc, bankera, bankercoin, bankers-dream, bankless-bed-index, bankless-dao, bankroll-extended-token, bankroll-vault, banksocial, bantu, bao-finance, bao-finance-v2, baousd, baptlabs, bark, barking, barnbridge, barter, bart-simpson-coin, based-ai, based-finance, basedpepe, based-shares, base-protocol, basic, basic-attention-token, basilisk, basis-cash, basis-gold-share-heco, basis-markets, basis-share, basketball-legends, basketcoin, baskonia-fan-token, bastion-protocol, bata, bathtub-protocol, battlefly, battle-for-giostone, battleforten, battle-hero, battle-infinity, battle-of-guardians-share, battle-pets, battle-saga, battleverse, battle-world, bayc-vault-nftx, baymax-finance, bazaars, bb-gaming, bbs-network, bcpay-fintech, b-cube-ai, bdollar, beacon, beam, beamswap, bean, bean-2, bean-cash, bear-inu, bear-scrub-money, beatgen-nft, beauty-bakery-linked-operation-transaction-technology, becoswap-token, bedlingtonterriertoken, bedrock, beechat, beeco, beefy-escrowed-fantom, beefy-finance, beenode, beep-coin, beer, beer-money, beethoven-x, beetroot, befasterholdertoken, befitter, befitter-health, beholder, bela, beldex, belifex, bella-protocol, bellcoin, belt, beluga-fi, beluga-protocol, bemchain, be-meta-famous, bemil-coin, ben-2, benddao, benft-solutions, benqi, benqi-liquid-staked-avax, ben-s-finale, benzene, bep20-leo, bepay, bepro-network, beradex, bergerdoge, bermuda, berry, berry-data, berryswap, berylbit, beryltriochain, beskar, bet2bank, beta-finance, beta-token, betero, betswap-gg, betswirl, betted, betterfan, betterment-digital, beyondcoin, beyond-finance, beyond-protocol, bezoge-earth, bfg-token, bficoin, bfx-finance, bhbd, bhive, bhnetwork, bho-network, biaocoin, bibi, biblecoin, biblepay, bibox-token, bib-token, biconomy, biconomy-exchange-token, bidao, bidao-smart-chain, bidipass, bidshop, bidz-coin, bifi, bifrost, bifrost-native-coin, bigcap, big-crypto-game, big-data-protocol, big-defi-energy, big-digital-shares, big-eyes, biggerminds, big-panda, bigshortbets, big-turn, bikerush, bilira, billiard-crypto, billionaires-pixel-club, billionhappiness, billy-token, bim, binamon, binance-bitcoin, binancecoin, binance-coin-wormhole, binance-eth, binanceidr, binance-peg-avalanche, binance-peg-bitcoin-cash, binance-peg-cardano, binance-peg-dogecoin, binance-peg-eos, binance-peg-filecoin, binance-peg-firo, binance-peg-iotex, binance-peg-litecoin, binance-peg-ontology, binance-peg-polkadot, binance-peg-xrp, binance-usd, binance-wrapped-btc, binance-wrapped-dot, binarydao, binaryx, binaryx-2, bincentive, binemon, bingo, binspirit, binstarter, bintex-futures, biokript, biometric-financial, biopassport, bios, birake, birb-2, bird-money, birdtoken, biskit-protocol, bismuth, biso, bistroo, biswap, bit2me, bitazza, bitball, bitbar, bitbase-token, bitbook-token, bitboost, bitcanna, bitcash, bitcastle, bitcci-cash, bitcicoin, bitci-racing-token, bitcoin, bitcoin-2, bitcoin-2-0, bitcoin-asia, bitcoin-avalanche-bridged-btc-b, bitcoinbam, bitcoin-bep2, bitcoin-br, bitcoin-cash, bitcoin-cash-sv, bitcoin-confidential, bitcoin-diamond, bitcoin-e-wallet, bitcoin-fast, bitcoin-free-cash, bitcoin-god, bitcoin-gold, bitcoin-green, bitcoin-hd, bitcoin-legend, bitcoinmono, bitcoin-pay, bitcoinpepe, bitcoin-plus, bitcoinpos, bitcoin-private, bitcoin-pro, bitcoin-red, bitcoin-scrypt, bitcoin-subsidium, bitcoin-trc20, bitcointry-token, bitcoinv, bitcoin-vault, bitcoinvb, bitcoinx, bitcoinz, bitcoiva, bitconey, bitcore, bitdao, bite, bitenium-token, bitflowers, bitforex, bit-game-verse-token, bitget-token, bithachi, bithash-token, bit-hotel, bitica-coin, bitindi-chain, bitkub-coin, bitlocus, bitmark, bitmart-token, bitmeme, bitmex-token, bitmon, bito-coin, bitone, bitorbit, bitoreum, bitpaid-token, bitpanda-ecosystem-token, bitrise-token, bitrue-token, bitscrow, bitshares, bitshiba, bitsniper, bitsong, bitspawn, bitstake, bitsten-token, bit-store-coin, bitstubs, bitsum, bittensor, bittoken, bittorrent, bittorrent-old, bittube, bittwatt, bitvalley, bitvote, bitwhite, bitxor, bitzen, bitzipp, biu-coin, blackcoin, blackdragon-token, black-eyed-dragon, blackhat-coin, blackhole-protocol, blackpearl-chain, black-phoenix, blackpool-token, black-rabbit-ai, blacksmith-token, black-stallion, blade, blank, blast-frontiers, blaze-network, blazestake-staked-sol, bless-global-credit, blind-boxes, blin-metaverse, blithe, blitz-labs, blitzpredict, blizzard-network, blizz-finance, blocery, block-ape-scissors, blockasset, blockaura, blockbank, blockbase, blockblend, blockblend-2, blockcdn, blockchain-bets, blockchain-brawlers, blockchain-certified-data-token, blockchain-cuties-universe-governance, blockchain-euro-project, blockchaingames, blockchain-monster-hunt, blockchainpoland, blockchainspace, blockcreate, block-e, blockescrow, blockgpt, blockless, blockmax, blocknet, blockombat, blockport, blockportal, blockremit, blockrock, blocks, blockscape, blocksmith-labs-forge, blocksport, blocksquare, blockstack, blockstar, blockster, blocksworkz, blockton, blockv, blockverse, blockx, bloc-money, blocsport-one, blocto-token, blokpad, bloktopia, bloody-bunny, bloom, blossom, blox, bloxmove-erc20, blox-token, blu, blueart, blue-baikal, bluebenx-2, bluebit, bluefin, bluejay, bluemove, bluesale, blueshift, bluesparrow, bluesparrow-token, bluewizard, blur, blurt, bluzelle, bmax, bmchain-token, bnb-bank, bnb-diamond, bnbpot, bnbtiger, bnext-b3x, bnktothefuture, bnpl-pay, bnsd-finance, bns-token, bob, boba-brewery, boba-network, bobcoin, bob-coin, bobo, bobo-coin, bobs_repair, bob-token, bocachica, bocoin, boda-token, bodrumspor-fan-token, body-ai, bogdanoff, bogey, bogged-finance, boid, boji, boku, bolide, bolivarcoin, bollycoin, bologna-fc-fan-token, bolt, boltbot, bolt-token-023ba86e-eb38-41a1-8d32-8b48ecfcb2c7, bomb, bombcrypto-coin, bomber-coin, bomb-money, bonded-cronos, bondly, bone-2, bonerium-boneswap, bone-shibaswap, boneswap, bone-token, bonfida, bonfire, bongweedcoin, bonk, bontecoin, boo, boo-finance, boo-mirrorworld, boop, boosted-lusd, booster, bora, borderless-money, borealis, bored, bored-apemove, bored-ape-social-club, bored-candy-city, bored-pepe-vip-club, boringdao, boringdao-[old], boring-protocol, bosagora, boson-protocol, boss, bossswap, bostrom, botopiafinance, bot-planet, botto, bottos, botxcoin, bountie-hunter, bounty0x, bountykinds-yu, bountymarketcap, bovineverse-bvt, bowl-shibarium, bowscoin, boxa, bpegd, b-protocol, bracelet, brain-sync, braintrust, brandpad-finance, brave-power-crystal, brazil-fan-token, brcp-token, brd, bread, breederdao, brewlabs, brick, brick-token, bridged-trueusd, bridge-mutual, bridge-network, bridge-oracle, bright-token, bright-union, brise-paradise, britto, brmv-token, brn-metaverse, broccoli, brokkr, brokoli, broovs-projects, brother-music-platform, brr-protocol, bruce-pepe, bruv, brz, bscex, bsclaunch, bscpad, bscstarter, bsc-station, bsdium, bsv, btaf-token, btc-2x-flexible-leverage-index, btcmoon, btc-proxy, btc-standard-hashrate-token, btf, btour-chain, btrips, bts-chain, btse-token, btu-protocol, bubblefong, bubu, buckhath-coin, buddy-dao, buff-coin, buff-doge-coin, buffedshiba, buffswap, build, buildup, bullbear-ai, bull-btc-club, bull-coin, bullet-2, bullets, bull-game, bullieverse, bullion, bull-market, bullperks, bull-token, bumblebot, bumble-c, bumoon, bumper, bundles, bunicorn, bunnypark, bunnypark-game, bunny-token-polygon, bunscake, burency, burger-swap, burn, burp, burrow, bursaspor-fan-token, busd-plenty-bridge, busdx, business-universe, busy-dao, butter, butterfly-protocol-2, buying, buymainstreet, buymore, bware-infra, b-watch-box, bxh, byepix, byld, bysl, byteball, bytecoin, byteex, bytenext, bytom, bytz, bzetcoin, bzx-protocol