py_functions.py

###GLOBAL SECTION###
current_year = 2020
###FUNCTION DEF###
def age_finder(parameter): #get the parameter from function call (ln.16) and save in *parameter*
    dob = parameter.split("/")
    yob = int(dob[2])
    result = current_year - yob #calculate result
    return result #return *result* to funciton call (ln.14)
####MAIN###
name = "Epoch" #create var called name
dob = "01/01/1970" #create var called dob in format dd/mm/yyyy

# call the function *age_finder()*
# passing value of *dob* as parameter
# save the result of the function in the variable age
age = age_finder(dob)

# print everything
print(f"Age of {name} born on {dob} is {age} in the year {current_year}.")