TA-Lib Python Wrapper only length-1 arrays error

Question

Code:

   def macd(prices):
        print "Running MACD"
        prices = np.asarray(prices)
        print prices
        macd, macdsignal, macdhist = MACD(prices, fastperiod=12, slowperiod=26, signalperiod=9)
        print "MACD "+macd

Explanation:

Im trying to run some analysis on a Python list containing closing prices.

I understand that I must convert the list before handing it over to TA-Lib, since I have seen all examples doing that.

However this is met by a only length-1 arrays can be converted to Python scalars

score 8 · Answer 1 · edited May 23 '17 at 10:30

8

I was importing the talib module like so, just like in TA-Libs website:

from talib.abstract import MACD

However, this is frowned upon in the community and today I found out why. One modules namespace was clobbering the other modules namespace, leading to the error. This is well put here.

So I just imported talib cleanly:

import talib

The final code that works is:

def macd(prices):
        print "Running MACD"
        prices = np.array(prices, dtype=float)
        print prices
        macd, macdsignal, macdhist = talib.MACD(prices, fastperiod=12, slowperiod=26, signalperiod=9)
        print "MACD "+macd

edited May 23 '17 at 10:30

Community

1
1

answered Aug 04 '16 at 21:58

1

oh boy, I had the same problem. Maybe they should change their examples, or am I getting something wrong here? :) you saved my evening.. – DaniPaniz Feb 20 '18 at 19:53
Thanks for sharing this. I met the same problem. – dexhunter Mar 13 '18 at 14:15

TA-Lib Python Wrapper only length-1 arrays error

1 Answers1