Episode 6 - An Exceptional Episode
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Description
Happy New Year! In this episode we're talking about exceptions, how they work, and how they evolved. Expect the unexpected.
# Timestamps
(00:00:00) INTRO
(00:01:43) How does a 'try' block work?
(00:04:00) How many 'try' blocks can you fit on a bus?
(00:05:56) How does Python store the current exception?
(00:09:30) Pre-history: exceptions as strings
(00:12:59) Try out string exceptions with CentOS 5
(00:14:28) PEP 341: Combining 'finally' and 'except' in one 'try' block
(00:16:15) Core Hacker in Residence
(00:16:51) PEP 3109: Raising exceptions in Python 3K
(00:19:17) Automatic tuple unpacking for raised exceptions?!
(00:21:55) PEP 3110: Catching exceptions in Python 3K
(00:26:00) Foreshadowing: exception groups
(00:27:10) PEP 3134: Exception chaining
(00:29:12) __cause__, __context__, __traceback__
(00:31:50) Back in the day we had to walk uphill both ways
(00:32:56) PEP 409: Suppressing exception chaining
(00:34:44) Raise from None? Or raise from Ellipsis?
(00:37:11) __supress_context__
(00:38:13) Semantic difference between 'pass', 'None', and '....'
(00:41:02) NotImplemented vs NotImplementedError
(00:43:02) Zero-cost exceptions in Python 3.11
(00:51:12) Reconstructing exception table entries dynamically
(00:52:51) Objects/exception_handling_notes.txt
(00:54:19) PEP 654: Historical context
(00:56:58) PEP 654: BaseExceptionGroup and ExceptionGroup
(00:58:29) PEP 654: except*
(01:03:23) PEP 678: Exception notes
(01:06:09) PEP 657: Cooler Errors
(01:08:36) A message to language implementers
(01:09:15) Fine-grained error locations in tracebacks
(01:12:05) This is useful for tracing coverage and Specializator
(01:13:50) Hacker in Residence fired?
(01:16:25) WHAT'S GOING ON IN CPYTHON
(01:16:58) Copy&patch JIT PR open
(01:21:30) Free-threading progress: GC split, stop-the-world
(01:24:22) The buildbots are red
(01:25:27) Faster CPython changes: interpreter code generator refactors
(01:26:27) Eval Game crash fix
(01:28:41) Three developers in residence!
(01:29:54) OUTRO
# Links
https://compilercrim.es/rust-np/
More Episodes
How does Python handle memory? Why does it need to perform custom forms of memory allocation? We talk about all that in this episode. We don't talk about Easter eggs, and we never mention Brandt by name, as promised last time!
## Timestamps
(00:00:00) INTRO
(00:00:22) PART 0: SPORTS...
Published 10/29/24
Published 10/29/24
Over 40 core developers spent a week in Bellevue WA putting finishing touches on Python 3.13, planning, prototyping, and implementing features for Python 3.14. We talked to half of them. We laughed, we cried. We were happy watching graphs go up, and sad watching them go down. It was intense....
Published 10/03/24
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