Re: Beazley on Generators
In message d2733ede-4d66-40a2-9a63-60d5363db...@q16g2000yqg.googlegroups.com, Michele Simionato wrote: Excellent reading for everybody wanting to understand cooperative concurrency! Hey, some of us were doing cooperative concurrency programming old MacOS for years. It was generally considered a poor alternative to true multitasking. -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
On Apr 1, 7:57 am, Lawrence D'Oliveiro l...@geek- central.gen.new_zealand wrote: In message d2733ede-4d66-40a2-9a63-60d5363db...@q16g2000yqg.googlegroups.com, Michele Simionato wrote: Excellent reading for everybody wanting to understand cooperative concurrency! Hey, some of us were doing cooperative concurrency programming old MacOS for years. It was generally considered a poor alternative to true multitasking. It is a poor alternative compared to OS level processes and even compared to preemptive threads in some cases. However, there are situations when you need thousands of lightweight threads of execution, and in that case coroutines could be the only viable solution. Just read David Beazley's presentation. -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
On 1 Apr., 07:03, Terry Reedy tjre...@udel.edu wrote: At PyCon2008, David Beazley presented an excellent talk on generators. Generator Tricks for Systems Programmershttp://www.dabeaz.com/generators/index.html At PyCon2009, he followed up with another talk on more advanced generator usage, which Guido commended on the python-ideas list: A Curious Course on Coroutines and Concurrencyhttp://dabeaz.com/coroutines/ I have just started (this one will take more than one sitting ;-) but it looks just as good. tjr There is just one thing I find disappointing. Since the talk is almost a compendium of advanced uses of generators I'm missing a reference to Peter Thatchers implementation of monads: http://www.valuedlessons.com/2008/01/monads-in-python-with-nice-syntax.html Peters implementation can be simplified but it already contains all relevant ideas. -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
Kay Schluehr wrote: There is just one thing I find disappointing. Since the talk is almost a compendium of advanced uses of generators I'm missing a reference to Peter Thatchers implementation of monads: http://www.valuedlessons.com/2008/01/monads-in-python-with-nice-syntax.html Peters implementation can be simplified but it already contains all relevant ideas. oh that's neat. thanks for that. andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
On Wed, 01 Apr 2009 01:03:50 -0400, Terry Reedy tjre...@udel.edu wrote: At PyCon2008, David Beazley presented an excellent talk on generators. Generator Tricks for Systems Programmers http://www.dabeaz.com/generators/index.html At PyCon2009, he followed up with another talk on more advanced generator usage, which Guido commended on the python-ideas list: A Curious Course on Coroutines and Concurrency http://dabeaz.com/coroutines/ Great presentations. Thanks. -- To email me, substitute nowhere-spamcop, invalid-net. -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
this is great, thanks... we have used generators to create something akin to a cooperative tasking environment... not to implement multitasking, but to be able to control low level data processing scripts. These scripts, written as generators, yield control to a control loop which then can pause, resume, abort, or change the state of shared context objects which the script uses as it's input and output space. E.g. the control loop can see there is intermediate output which an operator (managing a data reduction pipeline) might want to see. I can see from the first few slide I need to understand this. It already seems clear that there are ways to improve our approach to what we have done, though the overall approach is solid and works well. anyway thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
On Mar 31, 10:03 pm, Terry Reedy tjre...@udel.edu wrote: At PyCon2008, David Beazley presented an excellent talk on generators. Generator Tricks for Systems Programmershttp://www.dabeaz.com/generators/index.html At PyCon2009, he followed up with another talk on more advanced generator usage, which Guido commended on the python-ideas list: A Curious Course on Coroutines and Concurrencyhttp://dabeaz.com/coroutines/ I have just started (this one will take more than one sitting ;-) but it looks just as good. Yet another great thing about Python. The ability to run coroutines in Matlab would make my working life a lot easier right now. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
In message 13298fc5-5024-4343- bf5a-7e271a08d...@o11g2000yql.googlegroups.com, Michele Simionato wrote: However, there are situations when you need thousands of lightweight threads of execution ;;; The Linux kernel has been tested running hundreds of thousands of threads. -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
On Thu, 02 Apr 2009 11:37:46 +1300, Lawrence D'Oliveiro wrote: In message 13298fc5-5024-4343- bf5a-7e271a08d...@o11g2000yql.googlegroups.com, Michele Simionato wrote: However, there are situations when you need thousands of lightweight threads of execution ;;; The Linux kernel has been tested running hundreds of thousands of threads. Did it pass or fail that test? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
Lawrence D'Oliveiro l...@geek-central.gen.new_zealand writes: However, there are situations when you need thousands of lightweight threads of execution ;;; The Linux kernel has been tested running hundreds of thousands of threads. Those are still heavyweight threads requiring context switches to switch from one to another. If you look at the multi-threading benchmarks in the Alioth shootout, languages with lightweight threads (such as Erlang or GHC) can switch orders of magnitude faster than those that use kernel threads. -- http://mail.python.org/mailman/listinfo/python-list
Beazley on Generators
At PyCon2008, David Beazley presented an excellent talk on generators. Generator Tricks for Systems Programmers http://www.dabeaz.com/generators/index.html At PyCon2009, he followed up with another talk on more advanced generator usage, which Guido commended on the python-ideas list: A Curious Course on Coroutines and Concurrency http://dabeaz.com/coroutines/ I have just started (this one will take more than one sitting ;-) but it looks just as good. tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: Beazley on Generators
On Apr 1, 7:03 am, Terry Reedy tjre...@udel.edu wrote: At PyCon2008, David Beazley presented an excellent talk on generators. Generator Tricks for Systems Programmershttp://www.dabeaz.com/generators/index.html At PyCon2009, he followed up with another talk on more advanced generator usage, which Guido commended on the python-ideas list: A Curious Course on Coroutines and Concurrencyhttp://dabeaz.com/coroutines/ I have just started (this one will take more than one sitting ;-) but it looks just as good. tjr I concur. I have just read the first pages, but it says all good things I had to discover the hard way in years past. Excellent reading for everybody wanting to understand cooperative concurrency! M. Simionato -- http://mail.python.org/mailman/listinfo/python-list
