Cpython Alternatives

Posts

• (Python - not necessarily exclusive to it?) What happens "under the hood," when you string format?
  reddit.com/r/computerscience | 2021-01-23

  The formatting string is parsed into an iterable with the native function formatter_parser, and this is used to iterate over and insert the objects. The actual logic of the iteration happens in MarkupIterator_next.

• Pip has dropped support for Python 2
  news.ycombinator.com | 2021-01-23

  https://github.com/python/cpython/commit/b71c7dc9ddd6997be49...

    commit b71c7dc9ddd6997be49ed6aaabf99a067e2c0388

• Python 3's F-Strings: An Improved String Formatting Syntax
  news.ycombinator.com | 2021-01-20

  As the sibling comment points out, it actually doesn't work that way. The first parameter is only treated as a format string _if_ there are arguments. If not, it is treated as a literal string: https://github.com/python/cpython/blob/dcea78ff53d02733ac598...

• Who knew 20 nested loops is the max...
  reddit.com/r/programminghorror | 2021-01-18

  https://github.com/python/cpython/blob/6f0eb93183519024cb360162bdd81b9faec97ba6/Include/code.h#L95

• Is It Guaranteed That The Del Methods Will Be
  reddit.com/r/learnpython | 2021-01-17

  Because that's how it's defined to work: https://github.com/python/cpython/blob/master/Objects/typeobject.c#L6281

  reddit.com/r/learnpython | 2021-01-15

  You can see all of them here: https://github.com/python/cpython/blob/master/Objects/typeobject.c#L436

• Trying to create a peteranswer type program in python
  reddit.com/r/learnpython | 2021-01-16
• What's the difference between operator.lt(a, b) and operator.__lt__(a, b)?
  reddit.com/r/learnpython | 2021-01-15

  Here's the official source code for the python operator module, you'll see it's extremely simple: https://github.com/python/cpython/blob/3.9/Lib/operator.py

  reddit.com/r/learnpython | 2021-01-15

  I'm guessing somewhere in here: https://github.com/python/cpython/blob/master/Include/cpython/object.h

• python idle new window
  reddit.com/r/learnpython | 2021-01-14
• JSON parser
  reddit.com/r/shittyprogramming | 2021-01-14

  Might I suggest before spending too long trying to solve it with regexps you look at the official JSON spec and a few existing solutions to see if they give you a better understanding of the problem you want to solve. SimpleJSON's decoder, and the standard Python library version are both easy to read pure python solutions.

• Tracing and visualizing the Python GIL with perf and VizTracer
  dev.to | 2021-01-14

  Looking at the output of perf script (where we add --no-inline for performance reasons), we get a load of information. Looking at a state change event, we can now see that take_gil was called!

• If the compiled bytecode is portable, is the code for Python Virtual Machine (PVM) different across different platforms?
  reddit.com/r/learnpython | 2021-01-12

  I found this switch statement at line 1606 on Github. I read that this powers Python. I think this is the same for all platforms. So are there platform-specific things around it?

  reddit.com/r/learnpython | 2021-01-12

  LOAD_CONST is not the string "LOAD_CONST", it's a preprocessor macro that refers to the value of that specific instruction's opcode as a number. You can see all the opcode numbers here.

• How do generators store the state internally?
  reddit.com/r/learnpython | 2021-01-10

  If Im not mistaken, right there: https://github.com/python/cpython/blob/master/Objects/frameobject.c#L726