7 examples of 'roman to integer python' in Python

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def int_from_roman2(string):
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    acc = prev = 0
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    for c in reversed(string):
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        v = values[c]
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        if prev <= v: acc += v
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        else:         acc -= v
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        prev = v
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    return acc

553
def roman_to_int(n):
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    n = unicode(n).upper()
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    i = result = 0
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    for integer, numeral in numeral_map:
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        while n[i:i + len(numeral)] == numeral:
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            result += integer
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            i += len(numeral)
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    return result

2
def romanToInt(self, s):
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    """
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    :type s: str
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    :rtype: int
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    """
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    ans = 0
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    if not s:
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        return ans
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    symbs = {
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        'I': 1,
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        'V': 5,
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        'X': 10,
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        'L': 50,
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        'C': 100,
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        'D': 500,
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        'M': 1000,
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    }
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    ans += symbs[s[-1]]
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    for i in range(len(s) - 2, -1, -1):
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        if symbs[s[i]] >= symbs[s[i + 1]]:
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            ans += symbs[s[i]]
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        else:
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            ans -= symbs[s[i]]
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    return ans

91
def number_to_int(s):
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    """
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    Converts a numeric string to int. `s` can also be a Roman numeral.
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    """
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    try:
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        return int(s)
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    except ValueError:
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        try:
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            return fromRoman(s)
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        except RomanError as e:
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            raise ValueError(e)

64
def romanToInt(self, s):
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    """
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    :type s: str
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    :rtype: int
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    """
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    roman = {"I":1, "V":5, "X":10, "L":50, "C":100, "D":500, "M":1000}
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    total = 0
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    for index in range(len(s)-1):
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        type = 1 if roman[s[index]]>=roman[s[index+1]] else -1
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        total += type*roman[s[index]]
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    return total + roman[s[len(s)-1]]

17
def int_to_roman(num):
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    roman = OrderedDict()
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    roman[1000] = "M"
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    roman[900] = "CM"
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    roman[500] = "D"
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    roman[400] = "CD"
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    roman[100] = "C"
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    roman[90] = "XC"
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    roman[50] = "L"
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    roman[40] = "XL"
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    roman[10] = "X"
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    roman[9] = "IX"
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    roman[5] = "V"
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    roman[4] = "IV"
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    roman[1] = "I"
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    def roman_num(num):
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        for r in roman.keys():
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            x, y = divmod(num, r)
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            yield roman[r] * x
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            num -= (r * x)
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            if num > 0:
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                roman_num(num)
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            else:
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                break
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    return "".join([a for a in roman_num(num)])

22
def to_roman(n):
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    '''convert integer to Roman numeral'''
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    result = ''
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    for numeral, integer in roman_numeral_map:
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        while n >= integer:
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            result += numeral
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            n -= integer
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    return result