IDA export demangled function names

ida_demangle.py

import idautils, ida_funcs

def get_function_name(ea):
        origin = idaapi.get_func_name(ea)
        function_name = idaapi.demangle_name(
            origin,
            idc.get_inf_attr(INF_SHORT_DN)
        )

        if function_name:
            return function_name
        else:
            return origin

def get_func_names():
    names = []
    for ea in idautils.Functions():
        name = get_function_name(ea)
        names.append(name)
    return names

with open('workfile_sorted', 'w', encoding="utf-8") as f:
    names = get_func_names()
    names.sort()
    f.write('\n'.join(names))