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Episode 6 - An Exceptional Episode

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Manage episode 394079798 series 3522009
Content provided by Pablo Galindo and Łukasz Langa, Pablo Galindo, and Łukasz Langa. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Pablo Galindo and Łukasz Langa, Pablo Galindo, and Łukasz Langa or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.

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/

  continue reading

12 episodes

Artwork

Episode 6 - An Exceptional Episode

core.py

13 subscribers

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Manage episode 394079798 series 3522009
Content provided by Pablo Galindo and Łukasz Langa, Pablo Galindo, and Łukasz Langa. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Pablo Galindo and Łukasz Langa, Pablo Galindo, and Łukasz Langa or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.

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/

  continue reading

12 episodes

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