Python识别字符串中的自然语言（单词）

note1 = input("Enter your input: ")
wordlist = []
get_list = []
f = open('C:\\Users\\dell\\desktop\\big.txt', 'r')
 
for line in f:
    nlen = len(line)-1
    wordlist.append(line[:nlen])
f.close()
 
 
def divide_str(note, wordlist):
    i = 100
    head = 0
    flag = 0
    while head <= len(note) - 1:
        if head >= (len(note)-i):
            i = len(note)-head
        for p in range(i):
            rear = head + i - p
            flag = 0
            for each in wordlist:
                if note[head:rear] == each:
                    get_list.append(each)
                    # print(each)
                    head = head + len(each)
                    flag = 1
                    break
            if flag == 1:
                break
        if flag == 0:
            head = head + 1
 
divide_str(note1, wordlist)
print(get_list)