初心者向けPythonプロジェクト：ビットコイン価格通知

$ mkvirtualenv -p $(which python3) bitcoin_notifications

$ workon bitcoin_notifications  # To activate the virtual environment
$ pip install requests==2.18.4  # We only need the requests package

>>> import requests
>>> bitcoin_api_url = 'https://api.coinmarketcap.com/v1/ticker/bitcoin/'
>>> response = requests.get(bitcoin_api_url)
>>> response_json = response.json()
>>> type(response_json) # The API returns a list

>>> # Bitcoin data is the first element of the list
>>> response_json[0]
{'id': 'bitcoin', 'name': 'Bitcoin', 'symbol': 'BTC', 'rank': '1',
 'price_usd': '10226.7', 'price_btc': '1.0', '24h_volume_usd': '7585280000.0',
 'market_cap_usd': '172661078165', 'available_supply': '16883362.0',
 'total_supply': '16883362.0', 'max_supply': '21000000.0',
 'percent_change_1h': '0.67', 'percent_change_24h': '0.78',
 'percent_change_7d': '-4.79', 'last_updated': '1519465767'}

>>> import requests
>>> # Make sure that your key is in the URL
>>> ifttt_webhook_url = 'https://maker.ifttt.com/trigger/test_event/with/key/{your-IFTTT-key}'
>>> requests.post(ifttt_webhook_url)

import requests
import time
from datetime import datetime

def main():
    pass

if __name__ == '__main__':
    main()

BITCOIN_API_URL = 'https://api.coinmarketcap.com/v1/ticker/bitcoin/'
IFTTT_WEBHOOKS_URL = 'https://maker.ifttt.com/trigger/{}/with/key/{your-IFTTT-key}'

def get_latest_bitcoin_price():
    response = requests.get(BITCOIN_API_URL)
    response_json = response.json()
    # Convert the price to a floating point number
    return float(response_json[0]['price_usd'])


def post_ifttt_webhook(event, value):
    # The payload that will be sent to IFTTT service
    data = {'value1': value}
    # inserts our desired event
    ifttt_event_url = IFTTT_WEBHOOKS_URL.format(event)
    # Sends a HTTP POST request to the webhook URL
    requests.post(ifttt_event_url, json=data)

BITCOIN_PRICE_THRESHOLD = 10000  # Set this to whatever you like

def main():
    bitcoin_history = []
    while True:
        price = get_latest_bitcoin_price()
        date = datetime.now()
        bitcoin_history.append({'date': date, 'price': price})

        # Send an emergency notification
        if price < BITCOIN_PRICE_THRESHOLD:
            post_ifttt_webhook('bitcoin_price_emergency', price)

        # Send a Telegram notification
        # Once we have 5 items in our bitcoin_history send an update
        if len(bitcoin_history) == 5:
            post_ifttt_webhook('bitcoin_price_update',
                               format_bitcoin_history(bitcoin_history))
            # Reset the history
            bitcoin_history = []

        # Sleep for 5 minutes
        # (For testing purposes you can set it to a lower number)
        time.sleep(5 * 60)

def format_bitcoin_history(bitcoin_history):
    rows = []
    for bitcoin_price in bitcoin_history:
        # Formats the date into a string: '24.02.2018 15:09'
        date = bitcoin_price['date'].strftime('%d.%m.%Y %H:%M')
        price = bitcoin_price['price']
        #  (bold) tag creates bolded text
        # 24.02.2018 15:09: $10123.4
        row = '{}: ${}'.format(date, price)
        rows.append(row)

    # Use a 
 (break) tag to create a new line
    # Join the rows delimited by 
 tag: row1
row2
row3
    return '
'.join(rows)