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Understanding Python Bytecode

• rev_null 12y ago
  "I came here to HAVE_ARGUMENT!" "Oh! I'm sorry. This is abuse."
• marktangotango 12y ago
  Nice overview of Python bytecode. Reminded me of the 'No Frills Introduction to Lua 5.1 VM Instructions'[1]. I have not seen a similar document for Python yet, is there one? [1] http://luaforge.net/docman/83/98/ANoFrillsIntroToLua51VMInstructions.pdf http://luaforge.net/docman/83/98/ANoFrillsIntroToLua51VMInst...
  • abecedarius 12y ago
    I don't think so; https://docs.python.org/3/library/dis.html#python-bytecode-instructions https://docs.python.org/3/library/dis.html#python-bytecode-i... was the closest I found when I was writing a compiler for a subset of Python, and that doc was a little sketchy and out of date. I ended up consulting the CPython source a lot and reading some helpful blog series: http://docs.python.org/devguide/compiler.html http://docs.python.org/devguide/compiler.html http://akaptur.github.io/blog/categories/python-internals/ http://akaptur.github.io/blog/categories/python-internals/ http://eli.thegreenplace.net/category/programming/python/python-internals/ http://eli.thegreenplace.net/category/programming/python/pyt... http://tech.blog.aknin.name/category/my-projects/pythons-innards/ http://tech.blog.aknin.name/category/my-projects/pythons-inn... http://www.matusiak.eu/numerodix/blog/category/python-internals/ http://www.matusiak.eu/numerodix/blog/category/python-intern... Also Python 2 comes with a 'compiler' module which reimplements the built-in compiler in Python. (The real one is in C. The Python one was dropped from Python 3.)
• bnasty576 12y ago
  What is this used for? This went right over my head.
  • maxerickson 12y ago
    The byte code here is an implementation detail of an interpreter for the Python programming language. Wikipedia seems to have decent coverage: http://en.wikipedia.org/wiki/Bytecode http://en.wikipedia.org/wiki/Bytecode Someone at Coverity would likely be interested in understanding it to use in analyzing source code. They use automatic analysis to find defects.
  • RubyPinch 12y ago
    an example that comes to mind, Pony ORM uses it to convert a generator expression to SQL, https://stackoverflow.com/questions/16115713/how-pony-orm-does-its-tricks https://stackoverflow.com/questions/16115713/how-pony-orm-do...
• bnasty576 12y ago
  What is this used for? This went right over my head.
• bnasty576 12y ago
  What is this used for? This went right over my head.