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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def fuller(target, MA, MB, vA, vB, temperature='pore.temperature', pressure='pore.pressure'):
 r""" Uses Fuller model to estimate diffusion coefficient for gases from first principles at conditions of interest Parameters target : OpenPNM Object The object for which these values are being calculated. This controls the length of the calculated array, and also provides access to other necessary thermofluid properties. MA : float, array_like Molecular weight of component A [kg/mol] MB : float, array_like Molecular weight of component B [kg/mol] vA: float, array_like Sum of atomic diffusion volumes for component A vB: float, array_like Sum of atomic diffusion volumes for component B pressure : string The dictionary key containing the pressure values in Pascals (Pa) temperature : string The dictionary key containing the temperature values in Kelvin (K) """


    T = target[temperature]
    P = target[pressure]
    MAB = 2*(1.0/MA+1.0/MB)**(-1)
    MAB = MAB*1e3
    P = P*1e-5
    value = 0.00143*T**1.75/(P*(MAB**0.5)*(vA**(1./3)+vB**(1./3))**2)*1e-4
    return value