Opening textfiles in Python 3.2

[dumbzebra]

Hi, python- and programming beginner here.
As part of the MIT OpenCoursework lectures, as an asignment, I was given the task to write my code based on this
(http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00-introduction-to-computer-science-and-programming-fall-2008/assignments/ps5.py) predefined code that was given (my problem relates to the very first function "load_words()".
Without changing it, running that file should result in:

Code: Select all

Loading word list from file...
       83667 words loaded.
play_game not implemented.
play_hand not implemented.

Unfortunately, it shows:

Code: Select all

Traceback (most recent call last):
  File "C:\Python32\MIT\ps5.py", line 235, in <module>
    word_list = load_words()
  File "C:\Python32\MIT\ps5.py", line 27, in load_words
    inFile = open(WORDLIST_FILENAME,"r", 0)
ValueError: can't have unbuffered text I/O

Im working with python 3.2 (windows), the predefined code was written in python 2.6 or something.
What do I have to change to make it work?


edit: fixed links,spelling

[Zabaron]

If the code was written for Python 2, then you should use Python 2. Python 3 made a lot of library changes that are not backwards-compatible with Python 2. There is a tool included with Python 3 (2to3 I believe it's called), that will try to translate the Python 2 library calls to Python 3 ones, but I've never used it and I'm not sure how good it is.

-Zabaron

[Cleverbeans]

Alternatively you can read the lines given by the debugger, look up the error in the docs and try to fix it. You are self-studying after all.

[dumbzebra]

The problem with self-studying is, that i have no TA or prof to talk to. So i have to look up the error in google, and if that doesn't work, I'm pretty much screwed apart from asking in a forum.
Anyway, I did, however reluctantly, download the proper versin, and now I ask myself why they ever introduced parenthesis after print expressions.
Only seem to be redundant and make the scrip look more confusing.

[phlip]

and now I ask myself why they ever introduced parenthesis after print expressions.

So that print() can be just another function, rather than its own kind of special-cased statement. Which means you can do usual functional things with it, like passing it to map(). It also means one less special case in the language definition.

[ntomlin]

I too am going through the MIT course using python 3 for the extra practice. I just figured out how to make it work, so I thought I'd post it here. You have to change 2 lines:

python 2.x line:

Code: Select all

inFile = open(WORDLIST_FILENAME, 'r', 0)

new python 3.x line (get rid of 0 because unbuffered not allowed):

Code: Select all

inFile = open(WORDLIST_FILENAME, 'r')

python 2.x line:

Code: Select all

wordlist = split(line)

new python 3.x line:

Code: Select all

wordlist = line.split()