detecting outliers

outlier.py

def detect_outliers(data):
    outliers=[]
     
    threshold=3
    mean = np.mean(data)
    std =np.std(data)
     
     
    for i in data:
        z_score= (i - mean)/std 
        if np.abs(z_score) > threshold:# if z_score of  a data is bigger than 3, it is outlier
            outliers.append(i)
    return outliers