How to override method which is not class method or whitelisted method?

ERPNext Customize ERPNext
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1

Hello Everyone,
How to override method that is neither whitelisted nor class:


def send_event_digest():
	today = nowdate()

	# select only those users that have event reminder email notifications enabled
	users = [
		user
		for user in get_enabled_system_users()
		if is_email_notifications_enabled_for_type(user.name, "Event Reminders")
	]

	for user in users:
		events = get_events(today, today, user.name, for_reminder=True)
		if events:
			frappe.set_user_lang(user.name, user.language)

			for e in events:
				e.starts_on = format_datetime(e.starts_on, "hh:mm a")
				if e.all_day:
					e.starts_on = "All Day"

			frappe.sendmail(
				recipients=user.email,
				subject=frappe._("Upcoming Events for Today"),
				template="upcoming_events",
				args={
					"events": events,
				},
				header=[frappe._("Events in Today's Calendar"), "blue"],
			)

I want to update the message

2

Hi @Anisha_Jain
Please Read This Document. I hope It will help you
https://frappeframework.com/docs/user/en/python-api/hooks
Thank You!