Comments on: Writing a game in Python with Pygame. Part II http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/ Eli Bendersky's personal website Wed, 28 Jul 2010 12:22:47 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: ElephantInc http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/comment-page-1/#comment-232008 ElephantInc Thu, 03 Dec 2009 22:42:04 +0000 http://eli.thegreenplace.net/?p=1238#comment-232008 When ever I run this I get the error: AttributeError: 'str' object has no attribute 'get_rect' this is referring to to the line: img_rect = tile_img.get_rect() Im using python 2.5.2 and the latest version of pygame on mac OSX 10.4.11 What could the problem be? (it occurs in both your code and mine) When ever I run this I get the error: AttributeError: ’str’ object has no attribute ‘get_rect’
this is referring to to the line: img_rect = tile_img.get_rect()
Im using python 2.5.2 and the latest version of pygame on mac OSX 10.4.11
What could the problem be? (it occurs in both your code and mine)

]]> By: Trainer Dan http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/comment-page-1/#comment-185895 Trainer Dan Fri, 24 Jul 2009 20:11:09 +0000 http://eli.thegreenplace.net/?p=1238#comment-185895 Eli This is great. So detailed and yet very clearly explained. I've said it before and I'll say it again. You should be a trainer. The way you write shows you have a natural empathy with learners. That's a gift not everyone has. Ben Eli

This is great. So detailed and yet very clearly explained. I’ve said it before and I’ll say it again. You should be a trainer. The way you write shows you have a natural empathy with learners. That’s a gift not everyone has.

Ben

]]> By: jeff (Game Talk) http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/comment-page-1/#comment-157461 jeff (Game Talk) Mon, 23 Feb 2009 08:28:21 +0000 http://eli.thegreenplace.net/?p=1238#comment-157461 Thank you very much great video game. Thank you very much great video game.

]]> By: Zach http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/comment-page-1/#comment-149184 Zach Tue, 30 Dec 2008 16:46:31 +0000 http://eli.thegreenplace.net/?p=1238#comment-149184 great tutorial... a week ago i decided i wanted to learn this sort of thing, a quick google search and i find this great guide :-) keep up the good work! great tutorial… a week ago i decided i wanted to learn this sort of thing, a quick google search and i find this great guide :-)

keep up the good work!

]]> By: Aaron http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/comment-page-1/#comment-147625 Aaron Mon, 22 Dec 2008 23:40:04 +0000 http://eli.thegreenplace.net/?p=1238#comment-147625 @Andre: Just a note of clarification for those learning python: the expression "(x, y, z) = 1, 2, 3" is not a tuple being assigned to a tuple... it's a tuple (on the right hand side) being assigned in a multiple assignment statement. Python evaluates variables immediately, so in an _expression_, "x,y,z" will immediately evaluate the present value of x, and the other variables, and store the results in a tuple... once stored in the tuple, the tuple no longer refers to the variable x in any way, so it can't, for instance, assign something back to x. Feel free to try this out at the interactive prompt: `<code>__abENT__gt;__abENT__gt;__abENT__gt; x,y,z = 1,2,3 __abENT__gt;__abENT__gt;__abENT__gt; x 1 __abENT__gt;__abENT__gt;__abENT__gt; tup = x,y,z __abENT__gt;__abENT__gt;__abENT__gt; tup (1, 2, 3) __abENT__gt;__abENT__gt;__abENT__gt; tup = 7,8,9 __abENT__gt;__abENT__gt;__abENT__gt; x 1 __abENT__gt;__abENT__gt;__abENT__gt; *tup = 7,8,9 File __abENT__quot;__abENT__lt;stdin__abENT__gt;__abENT__quot;, line 1 *tup = 7,8,9 ^ SyntaxError: invalid syntax __abENT__gt;__abENT__gt;__abENT__gt;</code>` @Andre: Just a note of clarification for those learning python:

the expression “(x, y, z) = 1, 2, 3″ is not a tuple being assigned to a tuple… it’s a tuple (on the right hand side) being assigned in a multiple assignment statement.

Python evaluates variables immediately, so in an _expression_, “x,y,z” will immediately evaluate the present value of x, and the other variables, and store the results in a tuple… once stored in the tuple, the tuple no longer refers to the variable x in any way, so it can’t, for instance, assign something back to x.

Feel free to try this out at the interactive prompt:
>>> x,y,z = 1,2,3
>>> x
1
>>> tup = x,y,z
>>> tup
(1, 2, 3)
>>> tup = 7,8,9
>>> x
1
>>> *tup = 7,8,9
File "<stdin>", line 1
*tup = 7,8,9
^
SyntaxError: invalid syntax
>>>

]]> By: André Roberge http://eli.thegreenplace.net/2008/12/20/writing-a-game-in-python-with-pygame-part-ii/comment-page-1/#comment-147020 André Roberge Sat, 20 Dec 2008 13:30:28 +0000 http://eli.thegreenplace.net/?p=1238#comment-147020 Nice series! A small nit: you don't need the parentheses when assigning the states. You can simply write ALIVE, EXPLODING, DEAD = range(3) or you can skip range altogether and write ALIVE, EXPLODING, DEAD = 0, 1, 2 which may be less confusing to Python beginners since range() returns a list (before Python 3.0) and we have tuple being seemingly made equal to a list object. Nice series!

A small nit: you don’t need the parentheses when assigning the states. You can simply write

ALIVE, EXPLODING, DEAD = range(3)

or you can skip range altogether and write

ALIVE, EXPLODING, DEAD = 0, 1, 2

which may be less confusing to Python beginners since range() returns a list (before Python 3.0) and we have tuple being seemingly made equal to a list object.

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