Passing Values of Dictionaries to Function & Unable to Access Them

[firebird]

Hi Yoriz, thank you for the help as it led me to review and see what was wrong. Just for anyone to see the final solution, this is the full working script:

import numpy as np
import pandas as pd
from yahoofinancials import YahooFinancials

stocks = ['AAPL', 'MSFT', 'TSLA']

def stockdata():
    yahoo_financials = YahooFinancials(stocks)
    price = yahoo_financials.get_current_price()
    Open = yahoo_financials.get_open_price()
    return price, Open

def ExpMovingAverage(values, window):
    weights = np.exp(np.linspace(-1., 0., window))
    weights /= weights.sum()
    a =  np.convolve(values, weights, mode='full')[:len(values)]
    a[:window] = a[window]
    return a

if __name__ == "__main__":
    price = get_curprice()
    dF = pd.DataFrame(stockdata())
    data = dict(dF)
    for index, val in data.items():
        ema_val = ExpMovingAverage(val, 1)
        print("Exp. moving average based on open and current price is ", ema_val[-1:], index) 

The output, as expected, is:
Exp. moving average based on open and current price is [205.53] AAPL
Exp. moving average based on open and current price is [138.09] MSFT
Exp. moving average based on open and current price is [231.35] TSLA
It is important to note that in

weights = np.exp(np.linspace(-1., 0., window))

'window' refers to the number of data points to be averaged, in my example i'm using the 'open' and 'current' prices hence i use 'window = 1' since the index starts at 0. Not taking this into account will result in a thrown error such as

Error:
Traceback (most recent call last):
  File "C:\Users\bgeor\Desktop\multiEMAs.py", line 24, in <module>
    ema_val = ExpMovingAverage(val, 3)
  File "C:\Users\...\Desktop\multiEMAs.py", line 17, in ExpMovingAverage
    a[:window] = a[window]
IndexError: index 3 is out of bounds for axis 0 with size 2