CorrectNTSCRationalFramerate() port

gistfile1.py

from fractions import Fraction
from math import floor

class AVRational:
        num = 1
        den = 1

def av_q2d(rational):
    return float(Fraction(rational.num,rational.den))

def CorrectNTSCRationalFramerate(num,den):
    TempFPS = AVRational
    TempFPS.num = den
    TempFPS.den = num
    
    if TempFPS.num == 1:
        Num = TempFPS.den
        Den = TempFPS.num
    else:
        FTimebase = av_q2d(TempFPS)
        NearestNTSC = floor(FTimebase * 1001 + 0.5) / 1001
        SmallInterval = 1/120

        if abs(FTimebase - NearestNTSC) < SmallInterval:
            num = int((1001 / FTimebase) + 0.5)
            den = 1001

    return num, den

num = 2997
den = 100
print("before:",num,den)
num, den = CorrectNTSCRationalFramerate(num,den)
print("after:",num,den)