Python 3 implementation in Haskell

http://hackage.haskell.org/package/berp

by marshallp • 15 years ago

143 22 15 years ago

hackage.haskell.org

judofyr• 15 years ago

flazzarino• 15 years ago

but will it blend?

tresta• 15 years ago

Hmmm... won't install with ghc 7.0.4:

  $ cabal install berp
  Resolving dependencies...
  cabal: dependencies conflict: ghc-7.0.4 requires containers ==0.4.0.0 however
  containers-0.4.0.0 was excluded because berp-0.0.2 requires containers <0.4

exDM692• 15 years ago

This is pretty usual when it comes to major revision changes in the compiler or standard library with many languages.

This is what you should do:

1. checkout berp from GitHub

2. try to build using cabal in the checked out source tree

3. if there are failing dependencies, hack Cabal build files. this case is probably trivial and berp developers have left containers < 0.4 without a good reason (I may be wrong here, see what's changed in the "containers" package).

4. go to step 2, repeat until software is built

5. submit the change to github, file pull request

wbhart5• 15 years ago

After three hours of trying to install this with GHC 6.12.1 and GHC 7.0.3 I have given up.

The problem isn't with berp .cabal files but with dependencies of berp.

ghc-7.0.3 requires containers ==0.4.0.0 language-python requires containers ==0.3.0.0

ghc-6.12.1 requires directory ==1.0.1.0 language-python requires directory ==1.0.1.2

Fetching and unpacking language-python and changing the dependencies manually doesn't appear to fix the problem, for reasons I do not understand.

yoklov• 15 years ago

Welcome to the dll hell-style package management system of hackage.

marcf• 15 years ago

How fast is it?

wbhart5• 15 years ago

Mostly it doesn't actually work.

But the one trivial example I tried the berp interpreter was something like 1000 times slower than Python.

chbrosso• 15 years ago

Last update was in May 2010...

treo• 15 years ago

Last commit on August 04, 2011. https://github.com/bjpop/berp

wbhart5• 15 years ago

There is a commit to the new-identity branch on Oct 19th 2011.

sp332• 15 years ago

Some discussion of implementation on github: https://github.com/bjpop/berp/wiki/Developing-Berp

DasIch• 15 years ago

Which shows that this implementation doesn't support imports, keyword arguments, metaclasses, eval and variable scope annotations.

This might have been a nice exercise but it is completely unusable as a serious implementation.

egonschiele• 15 years ago

> Please note that Berp is currently in a very early stage of development. Many aspects of Python 3 are not yet implemented, and there are lots of rough edges to the code.

mulander• 15 years ago

  CLPython (http://common-lisp.net/project/clpython/) is 
  an open-source implementation of Python written in 
  Common Lisp. 
  It bridges the Python and Lisp worlds, so you can:
   * access Python libraries from Lisp;
   * access Lisp libraries from Python.

Runs on 6 different CL implementations. Like Berp it can interpret and compile if the underlying CL implementation supports compilation.

treeform2• 15 years ago

I wander if it adds any of Haskell's lazy and thread features?

treeform2• 15 years ago

To answer my own question it looks like it supports call/cc https://github.com/bjpop/berp/blob/master/test/regression/fe...

tail calls https://github.com/bjpop/berp/blob/master/test/regression/fe...

So those features are cool at-least...

Python 3 implementation in Haskell

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