我試圖輸入一個(gè)名字列表，然后確定哪些包含字母“e”或字母“E”，但它總是只返回 0。有人能告訴我為什么嗎？def count_contain_e():    num_names = int(input("How many names are you going to enter: "))    count = 0    for i in range(num_names):        name = input("Enter middle name: ")    if (name.find("e") >= 0):        count += 1    return countdef main():    num_w_e = count_contain_e()    print "The number of middle names with the letter e is " + str(num_w_e)main()