How to access a variable in one python function in another function [duplicate]

Question

I wrote a couple of functions to calculate the NPS and Margin of error of a sample responses.

I don't want to return the result from first function and then passing it to another function to be able to use them.

So I was looking to create global variables which can be available outside the function it's created so that it can be used in other function without having to pass them.

But it seems to throw the error. Any idea how to achieve this? I don't want to use a Class and make these variables as Class variables.

def nps_score(responses): 
    """Function to get the NPS score from the 
     Survey responses 

    """
    global sample_size = len(responses)
    global promoters_proportion = sum([1 for x in responses if x >=9])/sample_size
    global detractors_proprotion= sum([1 for x in responses if x<=6])/sample_size

    global sample_NPS= promoters_proportion - detractors_proportion

    print("Sample Net Promoter Score(NPS) is {} or {}%".format(sample_NPS,sample_NPS*100))



def moe():
    """ Calculate the margin of error
    of the sample NPS 

    """

    # variance/standard deviation of the sample NPS using 
    # Discrete random variable variance calculation

    sample_variance= (1-sample_NPS)^2*promoters_proportion + (-1-sample_NPS)^2*detractors_proportion

    sample_sd= sqrt(sample_variance)

    # Standard Error of sample distribution

    standard_error= sample_sd/sqrt(sample_size)

    #Marging of Error (MOE) for 95% Confidence level
    moe= 1.96* standard_error

    print("Margin of Error for sample_NPS of {}% for 95% Confidence Level is: {}%".format(sample_NPS*100,moe*100))