python怎么统计txt文件的字数

file_name = '白夜行.txt'

try:

    with open(file_name, encoding='utf8') as file_obj:

    #由于书名不是英文，要加上 encoding='utf8'

        contents = file_obj.read()

except FileNotFoundError:

    msg = 'Sorry, the file' + file_name + ' does not exist.'

    print(msg)

else:

    words = contents.rstrip()

    num_words = len(words)

    print('The file ' + file_name + ' has about ' + str(num_words) + ' words.')

The file 白夜行.txt has about 487761 words.