python global variables

Hi yet again guys! Here is the issue today with Python (or more realistically, me)

Here is the code:

Code:

---

def break_words(stuff):
    """This function will break up words for us."""
    words = stuff.split(' ')
    return words
   
def sort_words(words):
    """Sorts the words."""
    return sorted(words)
   
def print_first_word(words):
    """Prints the first word after popping it off."""
    words = words.pop(0)
    print word
   
def print_last_word(words):
    """Prints the last word after popping it off."""
    word = words.pop(-1)
    print word
   
def sort_sentence(sentence):
    """Takes in a full sentence and returns the sorted words."""
    words = break_words(sentence)
    return sort_words(words)
   
def print_first_and_last(sentence):
    """Prints the first and last words of the sentence."""
    words = break_words(sentence)
    print_first_word(words)
    print_last_word(words)
   
def print_first_and_last_sorted(sentence):
    """Sorts the words then prints the first and last one."""
    words = sort_sentence(sentence)
    print_first_word(words)
    print_last_word(words)

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And here is the output:

Code:

---

Python 2.7.3 (default, Sep 26 2012, 21:53:58)
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import python11
>>> sentence = "All good things come to those who wait."
>>> words = python11.break_words(sentence)
>>> words
['All', 'good', 'things', 'come', 'to', 'those', 'who', 'wait.']
>>> sorted_words = python11.sort_words(words)
>>> sorted_words
['All', 'come', 'good', 'things', 'those', 'to', 'wait.', 'who']
>>> python11.print_first_word(words)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "python11.py", line 13, in print_first_word
    print word
NameError: global name 'word' is not defined
>>>

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In the tutorial im using there is a valid output of All. Why is it not working for me? I have it typed exactly the way the tutorial shows.

Quote:

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Originally Posted by wingnut2626

Code:

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def print_first_word(words):
    """Prints the first word after popping it off."""
    words = words.pop(0)
    print word

---

---

Do you have an extra 's' that shouldn't be there?

Don't follow tutorials blindly.

Code:

---

def print_first_word(words):
    """Prints the first word after popping it off."""
    words = words.pop(0)
    print word

---

You're using the words array to store things. That's fine, but then you try and assign the result of words.pop(0) into words. I'm pretty sure that's not what you meant to do, right? word isn't even defined.

For instance, this would work better:

Code:

---

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

---

Thanks guys. Like i said the problem was with me, and a simple typo. Thank you again! Im learning more from ubuntu forums than I have from years of school!