generator function

[chansky]

I read the following link about generator:
http://www.python.org/peps/pep-0255.html
but I am still not so clear on the use/purpose of a generator function
other than the fact that a generator can retain the state of the local
variables within the fuction body. Can someone out there shed some
lights on this topic or share about how/when you would ever use a
generator function.

 

[Skip Montanaro]

tom> I read the following link about generator:
tom> http://www.python.org/peps/pep-0255.html
tom> but I am still not so clear on the use/purpose of a generator function
tom> other than the fact that a generator can retain the state of the local
tom> variables within the fuction body.

That's generally a more than sufficient reason. Have a look at the
SpamBayes tokenizer module and the several tokenize* methods and functions
it contains for some fairly elaborate examples:

http://tinyurl.com/jaun

Skip

 

[Terry Reedy]

I read the following link about generator:
http://www.python.org/peps/pep-0255.html
but I am still not so clear on the use/purpose of a generator function
other than the fact that a generator can retain the state of the local
variables within the fuction body. Can someone out there shed some
lights on this topic or share about how/when you would ever use a
generator function.

Besides the other answers, Lib/test/test_generators.py, at 40K,
contains a tutorial and lots of examples, include some that many would
not readily think of.

TJR