def ExtLinA(ea, n, line):
    idaapi.update_extra_cmt(ea, idaapi.E_PREV + n, line)
    idaapi.doExtra(ea)
Read all the Projects and check through their channels
dataset/ETHPy150Open EiNSTeiN-/idapython/python/idc.py/ExtLinA--crossover with--dataset/ETHPy150Open neurodata/ndstore/util/channelconversion.py/channelConversion.readProjects