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Clicking Icons on Windows
To illustrate, let’s keep using the script we wrote earlier, script1.py, repeated here to minimize page flipping:
# A first Python script
import sys # Load a library module
print(sys.platform)
print(2 ** 100) # Raise 2 to a power
x = 'Spam!'
print(x * 8) # String repetition
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As we’ve seen, you can always run this file from a system command line:
C:\misc> c:\python30\python script1.py
win32
1267650600228229401496703205376
Spam!Spam!Spam!Spam!Spam!Spam!Spam!Spam!
However, icon clicks allow you to run the file without any typing at all. If you find this file’s icon—for instance, by selecting Computer (or My Computer in XP) in your Start menu and working your way down on the C drive on Windows—you will get the file explorer picture captured in Figure 3-1 (Windows Vista is being used here). Python source files show up with white backgrounds on Windows, and byte code files show up with black backgrounds. You will normally want to click (or otherwise run) the source code file, in order to pick up your most recent changes. To launch the file here, simply click on the icon for script1.py.
Figure 3-1. On Windows, Python program files show up as icons in file explorer windows and can automatically be run with a double-click of the mouse (though you might not see printed output or error messages this way).
