I how do I write ln (integration) in phyton for the Affandi equation(fluid mechanics, with no x value)?

Question

The question and my answer are below but it comes up as an error if you could tell me how to fix it. thank you.

Write a function to calculate the specific volume using the Affandi Equation. The input of the function should be temperature (in units of degrees Celsius). The output should be in units of m 3 /kg.

Question 1(b) Autograded Answer

import numpy as np import np.log() as ln() import np.exp() as ex()

Question 1 def get_vg_Affandi(T):

*YOUR CODE HERE* 
   
a= -7.75883
b= 3.23753
c= 2.05755
d= -0.6052
e= 0.00529

ln(vg)=a+b*[(1/Tr)]**0.4+c/Tr**2+d/Tr**4+e/Tr**5
ln(vg)=a+b*[1/(Tr-273)]**0.4+c/(Tr-273)**2+d/(Tr-273)**4+e/(Tr-273)**5
vg=e**(a+b*[1/(Tr-273)]**0.4+c/(Tr-273)**2+d/(Tr-273)**4+e/(Tr-273)**5)
raise NotImplementedError()

return vg

The error part :

File "/tmp/ipykernel_279/3906628315.py", line 6 import np.log() as ln() ^ SyntaxError: invalid syntax