def fsliceafter ( astr , sub ) : findex = astr . find ( sub ) return astr [ findex + len ( sub ) : ]
python substring index variable
Return the slice after at sub in string astr
def fsliceafter(astr, sub):
    """Return the slice after at sub in string astr"""
    findex = astr.find(sub)
    return astr[findex + len(sub):]