TypeError: Not supported between instances of 'function' and 'int'

[palladium]

So now I have finished the code, but still need some help tidying things up a little.

import variables
import math

class common(object):   # common bits for both genders

    def a():
     a = 11.1122-0.9119*(math.log(variables.systolic_blood_pressure))-0.2767*(variables.smoking)-0.7181*(math.log(variables.cholesterol_ratio(variables.total_cholesterol,variables.HDL_cholesterol)))-0.5865*(variables.LVH)
     return a

    def mu1():
        mu1 = 4.4181+m
        return mu1

  #calculates risks for male
def risk_calculator_male():

        age = variables.age
        diabetes = variables.diabetes
        a = common.a()
        mu1 = common.mu1()
        m = a-1.4792*(math.log(age))-0.1759*(diabetes)
        #mu1 = 4.4181 + m  #commented out to demonstrate error
        sigma = math.exp(-0.3155-0.2784*m)
        mu2 = (math.log(5)-mu1)/sigma
        p = 1-math.exp(-math.exp(mu2))  #p is the five year risk i.e. the intended output of the function
        return round(p*100,2)

def risk_calculator_female():

        age = variables.age
        diabetes = variables.diabetes
        a = common.a()
        mu1 = common.mu1()
        m = a-5.8549+1.8515*((math.log(age/74))**2)-0.3758*(diabetes)
        #mu1 = 4.4181+m
        sigma = math.exp(-0.3155-0.2784*m)
        mu2 = (math.log(5)-mu1)/sigma
        p = 1-math.exp(-math.exp(mu2))

        return round(p*100,2)

def genderassignment():   #prompts user to enter gender and assigns correct calculator
        gender = input("Please enter gender, m for male and f for female. ")

        if gender == 'm':
          print(f"Your five year risk is: {risk_calculator_male()}% .")

        elif gender == 'f':
          print(f"Your five year risk is: {risk_calculator_female()}%. ")

        else:
            print("Does not compute!")
            return genderassignment()
genderassignment()

As you can see from the code above there are many common elements between the functions risk_calculator_male and risk_calculator_female, being a, mu1, sigma and mu2 (in fact everything is common except m). I want to try and put all the common bits in the common class but when I do it like above, I get an error message saying m is not defined in class common:

Error:
Traceback (most recent call last):
  File "framingham.py", line 82, in <module>
    genderassignment()
  File "framingham.py", line 46, in genderassignment
    print(f"Your five year risk is: {risk_calculator_male()}% .")
  File "framingham.py", line 20, in risk_calculator_male
    mu1 = common.mu1()
  File "framingham.py", line 11, in mu1
    mu1 = 4.4181+m
NameError: name 'm' is not defined

I can't make m global as it is different in both functions ( and I've read its bad practice anyway) and I can't define m in the common module because it depends on what gender the user enters. Is there a way around this, or do I just need to type it out in each function, like this:

import variables
import math

class common(object):   # common bits for both genders

    def a():
     a = 11.1122-0.9119*(math.log(variables.systolic_blood_pressure))-0.2767*(variables.smoking)-0.7181*(math.log(variables.cholesterol_ratio(variables.total_cholesterol,variables.HDL_cholesterol)))-0.5865*(variables.LVH)
     return a

  #calculates risks for male
def risk_calculator_male():

        age = variables.age
        diabetes = variables.diabetes
        a = common.a()
        mu1 = common.mu1()
        m = a-1.4792*(math.log(age))-0.1759*(diabetes)
        mu1 = 4.4181 + m
        sigma = math.exp(-0.3155-0.2784*m)
        mu2 = (math.log(5)-mu1)/sigma
        p = 1-math.exp(-math.exp(mu2))
        return round(p*100,2)

def risk_calculator_female():

        age = variables.age
        diabetes = variables.diabetes
        a = common.a()
        mu1 = common.mu1()
        m = a-5.8549+1.8515*((math.log(age/74))**2)-0.3758*(diabetes)
        mu1 = 4.4181+m
        sigma = math.exp(-0.3155-0.2784*m)
        mu2 = (math.log(5)-mu1)/sigma
        p = 1-math.exp(-math.exp(mu2))

        return round(p*100,2)

def genderassignment():   #prompts user to enter gender and assigns correct calculator
        gender = input("Please enter gender, m for male and f for female. ")

        if gender == 'm':
          print(f"Your five year risk is: {risk_calculator_male()}% .")

        elif gender == 'f':
          print(f"Your five year risk is: {risk_calculator_female()}%. ")

        else:
            print("Does not compute!")
            return genderassignment()

genderassignment()

Thanks again.