How to use the pelican.signals.initialized function in pelican

def register(): # for Pelican
    import pelican.signals

    pelican.signals.initialized.connect(_pelican_configure)
    pelican.signals.content_object_init.connect(new_page)

def register(): # for Pelican
    import pelican.signals

    pelican.signals.initialized.connect(_pelican_configure)

def register(): # for Pelican
    import pelican.signals

    pelican.signals.initialized.connect(_pelican_configure)

def register(): # for Pelican
    import pelican.signals

    pelican.signals.initialized.connect(_pelican_configure)

def register():
    signals.initialized.connect(add_jinja2_ext)
    signals.finalized.connect(find_missing_images)
    signal("autostatic_path_found").connect(autostatic_path_found)

def register():
    """
    Register the new "ipynb" reader
    """
    def add_reader(arg):
        arg.settings["READERS"]["ipynb"] = ipynbReader
    signals.initialized.connect(add_reader)

def register():
    signals.initialized.connect(init_default_config)
    signals.content_object_init.connect(bootstrapify)

def register():
    signals.initialized.connect(initialize_parser)

    try:
        signals.all_generators_finalized.connect(run_read_time)
    except Exception as e:
        raise "ReadTime Plugin: Error during 'register' process: {}".format(str(e))

def register():
    signals.initialized.connect(init_default_config)
    signals.article_generator_finalized.connect(generate_pdf_resume)

def register():
    import pelican.signals

    pelican.signals.initialized.connect(_configure_pelican)
    pelican.signals.finalized.connect(save_cache)
    pelican.signals.content_object_init.connect(new_page)