How to use the esptool.ELFSection function in esptool

if self.flags & self.PF_R:
            str += 'R'
        else:
            str += ' '
        if self.flags & self.PF_W:
            str += 'W'
        else:
            str += ' '
        if self.flags & self.PF_X:
            str += 'X'
        else:
            str += ' '
        return str


class ESPCoreDumpSection(esptool.ELFSection):
    """ Wrapper class for a section in core ELF file, has a section
        flags as well as the common properties of an esptool.ELFSection.
    """
    # section flags
    SHF_WRITE       = 0x1
    SHF_ALLOC       = 0x2
    SHF_EXECINSTR   = 0x4

    def __init__(self, name, addr, data, flags):
        """Constructor for section
        """
        super(ESPCoreDumpSection, self).__init__(name, addr, data)
        self.flags = flags

    def __repr__(self):
        """Returns string representation of section

if self.flags & self.PF_R:
            str += 'R'
        else:
            str += ' '
        if self.flags & self.PF_W:
            str += 'W'
        else:
            str += ' '
        if self.flags & self.PF_X:
            str += 'X'
        else:
            str += ' '
        return str


class ESPCoreDumpSection(esptool.ELFSection):
    """ Wrapper class for a section in core ELF file, has a section
        flags as well as the common properties of an esptool.ELFSection.
    """
    # section flags
    SHF_WRITE       = 0x1
    SHF_ALLOC       = 0x2
    SHF_EXECINSTR   = 0x4

    def __init__(self, name, addr, data, flags):
        """Constructor for section
        """
        super(ESPCoreDumpSection, self).__init__(name, addr, data)
        self.flags = flags

    def __repr__(self):
        """Returns string representation of section

if sec_type != ELFFile.SEC_TYPE_STRTAB:
            print('WARNING: ELF file has incorrect STRTAB section type 0x%02x' % sec_type)
        f.seek(sec_offs)
        string_table = f.read(sec_size)

        # build the real list of ELFSections by reading the actual section names from the
        # string table section, and actual data for each section from the ELF file itself
        def lookup_string(offs):
            raw = string_table[offs:]
            return raw[:raw.index(b'\x00')]

        def read_data(offs,size):
            f.seek(offs)
            return f.read(size)

        prog_sections = [ELFSection(lookup_string(n_offs), lma, read_data(offs, size)) for (n_offs, _type, lma, size, offs) in prog_sections
                         if lma != 0 and size > 0]
        self.sections = prog_sections

if sec_type != ELFFile.SEC_TYPE_STRTAB:
            print('WARNING: ELF file has incorrect STRTAB section type 0x%02x' % sec_type)
        f.seek(sec_offs)
        string_table = f.read(sec_size)

        # build the real list of ELFSections by reading the actual section names from the
        # string table section, and actual data for each section from the ELF file itself
        def lookup_string(offs):
            raw = string_table[offs:]
            return raw[:raw.index(b'\x00')]

        def read_data(offs,size):
            f.seek(offs)
            return f.read(size)

        prog_sections = [ELFSection(lookup_string(n_offs), lma, read_data(offs, size)) for (n_offs, _type, lma, size, offs) in prog_sections
                         if lma != 0]
        self.sections = prog_sections

def __repr__(self):
        return "%s %s" % (self.name, super(ELFSection, self).__repr__())

def __repr__(self):
        return "%s %s" % (self.name, super(ELFSection, self).__repr__())