Data Analysis with Python Projects - Mean-Variance-Standard Deviation Calculator

Python
1

Tell us what’s happening:

I have done as per requirements but i am getting an error :
TypeError: unsupported operand type(s) for -: ‘dict’ and ‘dict’
can anyone help with this one…

Your code so far

def calculate(list):
    if len(list)!=9:
        raise ValueError("List must contain nine numbers.")


    nine_arr=np.array(list).reshape(3,3)
    calculations={
    'mean':[np.mean(nine_arr,axis=0).tolist(),np.mean(nine_arr,axis=1).tolist(),np.mean(list)],
    'varience':[np.var(nine_arr,axis=0).tolist(),np.var(nine_arr,axis=1).tolist(),np.var(list)],
    'standard deviation':[np.std(nine_arr,axis=0).tolist(),np.std(nine_arr,axis=1).tolist(),np.std(list)],
    'max':[np.max(nine_arr,axis=0).tolist(),np.max(nine_arr,axis=1).tolist(),np.max(list)],
    'min':[np.min(nine_arr,axis=0).tolist(),np.min(nine_arr,axis=1).tolist(),np.min(list)],
    'sum':[np.sum(nine_arr,axis=0).tolist(),np.sum(nine_arr,axis=1).tolist(),np.sum(list)]
    }
    return calculations

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Challenge Information:

Data Analysis with Python Projects - Mean-Variance-Standard Deviation Calculator

2

Very good work, unfortunately the error message isn’t so helpful, it simply means your result isn’t correct.

You just mis-spelled

'variance'
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