PYTHON3 PLEASE! Overview: We will create a program that prints numbers as Roman

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PYTHON3 PLEASE!

Overview: We will create a program that prints numbers as Roman Numerals.

You can read more about how Roman Numerals work on Wikipedia https://en.wikipedia.org/wiki/Roman_numerals

Roman Numerals use letters to represent numbers.

1 is I

5 is V

10 is X

50 is L

100 is C

500 is D

1,000 is M

5,000 is v (really capital v with a line, but we can't print that)

10,000 is x (really capital x with a line)

Other numbers are made with a combination of these letters. For example, 3 is III.

Note: Numbers greater then 3,999 require symbols with lines over letters. We can't use these, so use lower case v for 5000 and x for 10000.

The first 10 numbers are

I

II (1+1=2)

III (1+1+1=3)

IV (5-1=4)

V

VI (5+1=6)

VII (5+2=7)

VIII (5+3=8)

IX (10-1=9)

X

This pattern repeats for larger numbers. For example to create 47, we need to figure out 40 first. 4 was IV, there are equivalent 1, 5, and 10 symbols for the tens place. We can determine that 40 is XL since X is 10 and L is 50. We then combine this with 7 from above to get XLVII. Every value can be broken down into this basic 1-9 pattern just using different symbols.

(1) Create a function roman(num, one, five, ten) that takes a number between 1 and 9. The function returns a string with the roman representation using the strings given for the one, five, and ten symbols. If a number outside the range is given return the empty string "".

For example, Executing roman(4,"X","L","C") should return "XL"

(2) Create a function roman_num(num) that takes a number between 1 and 9,999 and returns it as a Roman Numeral. Return an empty string outside the range. Use the function from the previous step.

For example, executing roman_num(47) should return "XLVII".

(3) Create a main program that asks users for a number and prints it as a Roman Numeral. The program should run until the user enters 0. Use the functions from the previous steps. Print "Bye." when you exit. Remember to use if name=="main": so ZyBooks can test your functions.

Here is an example execution trace.

--------------------------------------------------------------------------

--------------------------------------------------------

I believe my code is correct but I am not getting the correct output. ZyBooks is very sensitive and I'm not sure where to fix in my code

Below is my code:

import sys

from collections import OrderedDict

roman = OrderedDict()

def Roman():
roman[1000] = "M"
roman[500] = "D"
roman[100] = "C"
roman[50] = "L"
roman[10] = "X"
roman[5] = "V"
roman[1] = "I"
  
def roman_num(num):
  
if num >= 1 and num <= 9999:
  
Roman()
  
for r in roman.keys():
  
x,y = divmod(num, r)
  
yield roman[r] * x
  
num -= (r * x)
  
if num > 0:
  
roman_num(num)
  
else:
  
break
else:
num=""
  
return 'Roman Numerals:',num

if __name__ == "__main__":
  
print("Roman Number Generator. Enter 0 to quit.")
  
num = int(input("Enter a number between 1 and 9,999:"))
  
if num == 0:
  
print("Bye.")
sys.exit()
  
else:
print("".join([a for a in roman_num(num)]))

here is the output problems i am experiencing

Explanation / Answer

As I checked, your whole logic is correct and you made great effort.

To work properly, only thing you need to do is to add some keys in your Roman function like this:

def Roman():
    roman[1000] = "M"
    roman[900] = "CM"
    roman[500] = "D"
    roman[400] = "CD"
    roman[100] = "C"
    roman[90] = "XC"
    roman[50] = "L"
    roman[40] = "XL"
    roman[10] = "X"
    roman[9] = "IX"
    roman[5] = "V"
    roman[4] = "IV"
    roman[1] = "I"

    Thank You

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