Need to do on python

Define the get_text_valuation function which is passed two parameters, a dictionary and a string of text. The keys of the parameter dictionary are single letters and the corresponding values are integers (the value of the key letter), eg.. [b: 5, 'a: 6, c:3). The function returns the total valuation (an integer) of the string of text where . if the letter from the text is a keyletter of the dictionary then its value is the integer corresponding to the letter in the dictionary, .any alphabetic characters from the text which are not in the dictionary are worth 1, and, all non alphabetic characters are worth 0 (use the isalpha() method to check if a character is alphabetic or not). Notes you will need to change the text to lowercase before you work out the total value of the text, you can assume that all the keys in the dictionary are lowercase characters. For example, the following code letter-value-dict {"r": 2, "s": 2, "h":4, "t":3, "m": 7, "g" :4, "v":8) lettersBLAH print("1.", letters,-"get_text_valuation(letter_value_dict, letters)) lettersthought provoking print("2.", letters, -get text_valuation(letter_value_dict, letters)) letters-"too much month at the end of the money" print("3.", letters, "-"get_text_valuation(letter_value_dict, letters)) prints: 1. BLAH - 7 thought provoking 40 3.too much month at the end of the money 7e