How do i test my code to know if its working fine because it didn't produce any error in Jupyter notebook

How do i know if my code is working fine:

**import numpy as np

def calculate(list):
    if len(list)<9:
        print("List must contain nine numbers")
    else:
        a=np.reshape(list,(3,3))
        b=(np.mean(a,axis=0),np.mean(a,axis=1),np.mean(a))
        c=(np.var(a,axis=0),np.var(a,axis=1),np.var(a))
        d=(np.std(a,axis=0),np.std(a,axis=1),np.std(a))
        e=(np.max(a,axis=0),np.max(a,axis=1),np.max(a))
        f=(np.min(a,axis=0),np.min(a,axis=1),np.min(a))
        g=(np.sum(a,axis=0),np.sum(a,axis=1),np.sum(a))
        calculations={ 'mean': [b],'variance': [c],'standard deviation': [d],'max': [e],'min': [f],'sum': [g] }
    return calculations**

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Challenge: Mean-Variance-Standard Deviation Calculator

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