human
I am working on the file "PNTerms/AngularMomentum.ipynb".
The first task is:
Collected terms
Can you write Python code for it?
 ... Can you provide a the Python code you requested?
assistant
#Here is the Python code you requested.

def AngularMomentumExpression(AngularMomentumTerms=[AngularMomentum_NoSpin, AngularMomentum_Spin], PNOrder=frac(7,2)):
    # We have to play some tricks with the log terms so that `horner` works
    def logterm(key,val):
        if 'lnv' in val:
            return logv
        else:
            return 1
    return L_coeff*horner(sum([key*(v**n)*logterm(key,val)
                               for Terms in AngularMomentumTerms
                               for n in range(2*PNOrder+1)
                               for key,val in Terms.items()
                               if val.endswith('_{0}'.format(n))])).subs(logv, ln(v))

# display(AngularMomentumExpression(PNOrder=frac(8,2)))