- SystemExit, sys.exit() raises SystemExit, if you actually want to keep going, you can just catch this exception, nothing special about it.
- iter(callable, terminal), basically if you use iter in this way, it will keep calling the callable until the callable returns terminal, than it beaks.
- a < x < b , in Python you can chain comparison operators like this. That's the same as writing a < x and x < b.
- dict(), amongst the other ways to instantiate a dictionary in Python, you can give it a list of two tuples, so for example, [('a', 2), ('b', 3')] becomes {'a': 2, 'b': 3}.
- open(filename), is an iterable, each iteration yields another line.
- If you don't need ordering, use set() instead of list(). set() has better runtime for just about every operation, so if you don't need the ordering, use it.
- Python comes with turtle graphics. This probably doesn't matter to most people, but if you want to help get a kid into programming, import turtle can be a great way.
- pdb, the Python debugger is simply invaluable, try: code that isn't working, except ExceptionThatGetsRaised: import pdb; pdb.set_trace() is all it takes to get started with the itneractive debugger.
- webbrowser.open(url), this module is just cool, it opens up the users browser to the desired URL.
And those are my tips! Please share yours.
import antigravity
ReplyDeletehttp://svn.python.org/view/python/trunk/Lib/antigravity.py?rev=66902&view=markup