for item in lst:
    if item.b:
        if item.a:
            if item.c and item.d:
                # do something
            elif not item.c:
                # do something else
            elif item.c and not item.d:
                # you're starting to get this
        else:
            # here too
    elif item.e:
        if item.a:
            if item.c and item.d:
                # do something
            elif not item.c:
                # do something else
            elif item.c and not item.d:
                # do something else
        else:
            # do something else
    elif item.f and not item.g:
        if item.a:
            if item.c and item.d:
                # do something
            elif not item.c:
                # do something else
            elif item.c and not item.d:
                # do something else
        else:
            # do something else
    elif item.g and not item.f:
        if item.a:
            if item.c and item.d:
                # do something
            elif not item.c:
                # do something else
            elif item.c and not item.d:
                # do something else
        else:
            # do something else
    elif item.g and item.f:
.
.
.