NameError: name 'startCommand' is not defined – PYTHON – Telegram API

from coinbase.wallet.client import Client
from telegram import ParseMode
from telegram.ext import CommandHandler, Defaults, Updater

COINBASE_KEY = 'xxxxxxxxxxxx'
COINBASE_SECRET = 'xxxxxxxxxxxx' 
TELEGRAM_TOKEN = 'xxxxxxxxxxxx'

coinbase_client = Client(COINBASE_KEY, COINBASE_SECRET)

#if __name__ == '__main__':
updater = Updater(token=TELEGRAM_TOKEN, defaults=Defaults(parse_mode=ParseMode.HTML))
dispatcher = updater.dispatcher
dispatcher.add_handler('start', startCommand) # Accessed via /start
dispatcher.add_handler('alert', priceAlert) # Accessed via /alert

updater.start_polling() # Start the bot

updater.idle() # Wait for the script to be stopped, this will stop the bot


def startCommand(update, context):
    context.bot.send_message(chat_id=update.effective_chat.id, text='Hello there!')

def priceAlert(update, context):
    if len(context.args) > 2:
        crypto = context.args[0].upper()
        sign = context.args[1]
        price = context.args[2]

        context.job_queue.run_repeating(priceAlertCallback, interval=15, first=15, context=[crypto, sign, price, update.message.chat_id])

        response = f"⏳ I will send you a message when the price of {crypto} reaches £{price}, n"
        response += f"the current price of {crypto} is £{coinbase_client.get_spot_price(currency_pair=crypto + '-GBP')['amount']}"
    else:
        response = '⚠️ Please provide a crypto code and a price value: n<i>/price_alert {crypto code} {> / &lt;} {price}</i>'

    context.bot.send_message(chat_id=update.effective_chat.id, text=response)


def priceAlertCallback(context):
    crypto = context.job.context[0]
    sign = context.job.context[1]
    price = context.job.context[2]
    chat_id = context.job.context[3]

    send = False
    spot_price = coinbase_client.get_spot_price(currency_pair=crypto + '-GBP')['amount']

    if sign == '<':
        if float(price) >= float(spot_price):
            send = True
    else:
        if float(price) <= float(spot_price):
            send = True

    if send:
        response = f'👋 {crypto} has surpassed £{price} and has just reached <b>£{spot_price}</b>!'

        context.job.schedule_removal()

        context.bot.send_message(chat_id=chat_id, text=response)

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I get this error of the code above, also I have already tried changing the position of the def but, it also shows error, How to solve this?
It is the code for telegram bot and also this keeps on showing me NameError, I have already added python3 and pip, but still not solved