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TUTORIAL:Import and Initialize
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<title>Pygame Tutorials - Import and Initialize</title>
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<h1 align=center><font size=-1>Pygame Tutorials</font><br>Import and Initialize</h1>
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<h2 align=center>by Pete Shinners<br><font size=-1>pete@shinners.org</font></h2>
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<h3 align=center>Revision 1.0, January 28th, 2002</h3>
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Getting pygame imported and initialized is a very simple process. It is also
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flexible enough to give you control over what is happening. Pygame is a
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collection of different modules in a single python package. Some of the
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modules are written in C, and some are written in python. Some modules
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are also optional, and might not always be present.
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This is just a quick introduction on what is going on when you import pygame.
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For a clearer explanation definitely see the pygame examples.
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<br> <br> <br>
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First we must import the pygame package. Since pygame version 1.4 this
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has been updated to be much easier. Most games will import all of pygame like this.
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<ul><pre>import pygame
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from pygame.locals import *</pre></ul>
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The first line here is the only necessary one. It imports all the available pygame
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modules into the pygame package. The second line is optional, and puts a limited
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set of constants and functions into the global namespace of your script.
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An important thing to keep in mind is that several pygame modules are optional.
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For example, one of these is the font module. When you "import pygame", pygame
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will check to see if the font module is available. If the font module is available
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it will be imported as "pygame.font". If the module is not available, "pygame.font"
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will be set to None. This makes it fairly easy to later on test if the font module is available.
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<br> <br> <br>
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Before you can do much with pygame, you will need to initialize it. The most common
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way to do this is just make one call.
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<ul><pre>pygame.init()</pre></ul>
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This will attempt to initialize all the pygame modules for you. Not all pygame modules
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need to be initialized, but this will automatically initialize the ones that do. You can
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also easily initialize each pygame module by hand. For example to only initialize the
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font module you would just call.
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<ul><pre>pygame.font.init()</pre></ul>
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Note that if there is an error when you initialize with "pygame.init()", it will silently fail.
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When hand initializing modules like this, any errors will raise an exception. Any
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modules that must be initialized also have a "get_init()" function, which will return true
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if the module has been initialized.
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It is safe to call the init() function for any module more than once.
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<br> <br> <br>
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Modules that are initialized also usually have a quit() function that will clean up.
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There is no need to explicitly call these, as pygame will cleanly quit all the
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initilized modules when python finishes.
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docs/tut/ImportInit.html
