app.py
def page_not_found(e):
    """
    Function is invoked when the requests made to the url have no response i.e. the page
    doesn't exist.

    The errorhandler decorator passes an error message to the function.
    Therefore is has to be received even when not used.

    :param e: The error message
    :return: a rendered template for the 404 page
    """
    return render_template("404.html")

    Function is invoked when the requests made to the url have no response i.e. the page
    doesn't exist.

    The errorhandler decorator passes an error message to the function.
    Therefore is has to be received even when not used.

    :param e: The error message
    :return: a rendered template for the 404 page
    
Function is invoked when the requests made to the url have no response i.e. the page
doesn't exist.

The errorhandler decorator passes an error message to the function.
Therefore is has to be received even when not used.
Function is invoked when the requests made to the url have no response i . e . the page doesn ' t exist . The errorhandler decorator passes an error message to the function . Therefore is has to be received even when not used .
def page_not_found(e):
    return render_template("404.html")
def page_not_found ( e ) : return render_template ( "404.html" )
Function is invoked when the requests made to the url have no response i.e.
Function is invoked when the requests made to the url have no response i . e .
"""
    Function is invoked when the requests made to the url have no response i.e. the page
    doesn't exist.

    The errorhandler decorator passes an error message to the function.
    Therefore is has to be received even when not used.

    :param e: The error message
    :return: a rendered template for the 404 page
    """
a rendered template for the 404 page
a rendered template for the 404 page
e
The error message
The error message