Python AttributeError:'；str'；对象没有属性'；流行音乐'；在路上学东西

我有一个关于这个错误的持续问题，我试图解决这个问题，因为教程告诉我要修复这个代码。大多数代码都是拼写和数学错误，但是我无法解决这个AttributeError

教程网站：

以下是回溯错误：回溯（最近一次呼叫最后一次）：

文件“C:\Python34\ex26.py”，第74行，在 打印第一个单词（句子）文件“C:\Python34\ex26.py”，第10行，打印第一个单词 word=words.pop（0）

AttributeError:“str”对象没有属性“pop”

我的代码，作为测试，我必须修复教程代码：

def break_words(stuff):
    words = stuff.split(' ')
    return words

def sort_words(words):
    return sorted(words)

def print_first_word(words):
    word = words.pop(0)
    print(words)

def print_last_word(words):
    word = words.pop(-1)
    print(word)

def sort_sentence(sentence):
    words = break_wrods(sentence)
    return sort_words

def print_first_and_last(sentence):
    words = break_words(sentence)
    print_first_word(words)
    print_last_word(words)
    return words

def print_first_and_last_sorted(sentence):
    words = sort_sentence(sentence)
    print_first_word(words)
    print_last_word(words)
    return words

print("Let's practice everything.")
print("You\'d need to know \' bout escapes with \\ that do \n newlines and \t tabs.")

poem = """
\tThe lovely world with logic
cannot discern \n the needs of love
nor comprehend passion from intuition
and requires an explaination
\n\twhere there is none.
"""

print("-" * 10)
print(poem)
print("-" * 10)

five = 10 - 2 + 3 - 5
print("This should be five: %s " % five)

def secret_formula(started):
    jelly_beans = started * 100
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates

start_point = 10000

beans, jars, crates = secret_formula(start_point)

print("With a starting point of: %d " % start_point)
print("We'd have %d jeans, %d jars, and %d crates." % (beans,jars,crates))

start_point = start_point / 10

print("We can also do that this way: ")
print("We'd have %d beans, %d jars, and %d crabapples." % secret_formula(start_point))

sentence = "All good\tthings come to those who wait."

words = sentence.split()
sorted_words = sort_words(sentence)

print_first_word(sentence)
print_last_word(sentence)
print_first_word(sorted_words)
print_last_word(sorted_words)
sorted_words = sort_sentence(sentence)
print(sorted_words)

print_first_and_last(sentence)
print_first_and_last_sorted(sentence)

---

您正在此处传入一个字符串：

sentence = "All good\tthings come to those who wait."
# ...
print_first_word(sentence)

你要通过一个名单；大概你是想把

单词

传进来；这是一个列表（调用

str.split（）

的结果）：

使用以下命令：

print_first_word(words)

与此相反：

print_first_word(sentence)

---

谢谢，我无意中犯了一个错误，你的解释很完美。我是新来的堆栈溢出，所以很荣幸能解决这个小问题。

print_first_word(sentence)