Question on parsing the exchange rate from json to python. How to implement automatic updating of a variable in code?

Question

Python

import requests
import json


 
url = 'https://blockchain.info/ticker'
 
def btc():
    global btc
    response = requests.get(url)   
    json_data = json.loads(response.text)
    price = json_data['RUB']
    btc = price['last']
    
btc()  
btc = btc

How to make sure that the fresh exchange rate is always written to the final btc variable? I use the code in the telegram bot, and the course always displays, which was parsed when the bot started. I am new to python, and I have to learn it from my phone, and manipulating the code on the hosting via rdp is not very convenient and takes a lot of time.

Answer 1

After you run the btc() function, the btc function is replaced by a number. So just calling the function something else should help. For example, UpdatePrice. That is, it will be like this:
url = ' https://blockchain.info/ticker '

def UpdatePrice():
    response = requests.get(url)   
    json_data = json.loads(response.text)
    price = json_data['RUB']
    btc = price['last']
    return btc
    
btc = UpdatePrice()

I also removed global, because it poses a threat to further development)