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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_setting_with_envfallback(setting, default=None, typecast=None):
 """ Get the given setting and fall back to the default of not found in ``django.conf.settings`` or ``os.environ``. :param settings: The setting as a string. :param default: The fallback if ``setting`` is not found. :param typecast: A function that converts the given value from string to another type. E.g.: Use ``typecast=int`` to convert the value to int before returning. """

    try:
        from django.conf import settings
    except ImportError:
        return default
    else:
        fallback = getattr(settings, setting, default)
        value = os.environ.get(setting, fallback)
        if typecast:
            value = typecast(value)
        return value