godot function that restricts a string to only use numbers - for numeric value input

restrictToNumbers.gd

func _on_H_text_changed():
	hInput.set_text(returnNumbersOnly(hInput.get_text()))
	hInput.cursor_set_column(hInput.get_text().length(),true)
	
## This function restricts the input to be only numeric###	
func returnNumbersOnly(enteredText):
	var word = ''
	for letter in enteredText:
		var resultingText = RegEx.new()
		resultingText.compile('[0-9]',9) #search pattern
		if resultingText.find(letter,0,-1) != -1 : word = word+letter
	print('result is: ', word)
	return word