assignment_2.py

def translate_numeral(number):
    if type(number) == str:  # check type of input
        roman_numeral = number
        #======enter code below======
        
        c_map= {'I' : 1, 'V' : 5, 'X' : 10, 'L' : 50, 'C' : 100,'D' : 500, 'M' : 1000}
#c_map gives a dictionary that assigns each roman characters recpective value

        arabic_number = 0 #initial value for arabic number before we start calculating
        a = list(roman_numeral) #makes a list of string characters



        a.reverse() #reverses the order of the list 
        #Because my algorithm wants to read the last character first
        print(type(a)) #I want to see type the list which will go into the for loop
        print(a) #I want to see the list which will go into the for loop
        for rom in range(len(a)): #rom abbreviation for roman character
            print(arabic_number) 
 #prints me out each step of the loop so that I could check where things go wrong
#in my algortihm (when they did go wrong) could be deleted after
    
            if rom == 0:  #I assign the value of the initial character to arabic_number
                arabic_number += c_map[a[rom]]
            
        #now for the next characters I can compare the value with the next one
        #
            elif rom >0 and  c_map[a[rom - 1]] > c_map[a[rom]]:
                arabic_number += -1 * c_map[a[rom]] 
                 
            elif rom > 0 and  c_map[a[rom -1]] <= c_map[a[rom]]:
                arabic_number += c_map[a[rom]]

    else:
        print('Input not valid.')
        
    print('{0} translated to {1}!'.format(roman_numeral, arabic_number))
  # print the result
    return arabic_number
  ## The function works well, 
  ## But I still get Not all numerals translated correctly result. ¯\_(ツ)_/¯
  ## I Thought it might be because I reversed the roman characters
  ## for my algorithm But I am not sure
  
  
if __name__ == '__main__':
    input_numerals = ['X', 'XXVIII', 'LXXI', 'XCIX', 'MCMXCIV']
    outputs = [10, 28, 71, 99, 1994]
    results = [True, True, True, True, True]

    for index in range(5):
        if translate_numeral(input_numerals[index]) != outputs[index]:
            results[index] = False
            
    if False in results:
        print('Not all numerals translated correctly. Try again.')
        
    else:
        print('Well done! All numerals translated correctly.')