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ast2src 2010.01.21.ast2src

DESCRIPTION: ast2src - reverse compile ast tree back to legal python source code

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DESCRIPTION: ast2src - reverse compile ast tree back to legal python source code

  REQUIRES: LINUX OS AND PYTHON3.1

  QUICK TEST: $ python3.1 setup.py build dev --quicktest

  SUMMARY:
  ast2src is a pure python module.
  ast2src is a python ast tree hack.

RECENT CHANGELOG:
  20100121 - added ast2src
  20091231 - added <<<< and >>>> sugar
  20091224 - added pseudomethod interactive console - revamped pseudomethod import hook
  20091224 - modularized package - fix install issues - added sdist check
  20091209 - improved documentation
  20091205 - moved source code to c++
  20091116 - package integrated

DEMO USAGE:

  PseudoSugar - adding hook  to sys.meta_path
>>> from ast2src import *

>>> ## let's use ast2src's source code as example
>>> import ast2src, ast
>>> source_code1 = open(ast2src.__file__).read()
>>> print( '\n' + re.sub('\n+', '\n', source_code1[:1024]) + '...' )

## import ast2src; reload(ast2src); from ast2src import *
import os, sys
if os.name != 'posix': sys.stderr.write('\nast2src requires linux os\n\n'); exit()
if sys.version_info[:2] != (3, 1): sys.stderr.write('\nast2src requires python3.1\n\n'); exit()
if 1: ###### INIT
  import ast2src as _MODULE
  if '_SETUP' not in globals(): _SETUP = sys.modules.get('ast2src.setup', None)
  def closure(*args, **kwds): return lambda fnc: fnc(*args, **kwds)
  def identity(aa): return aa
  def _import(ss, globals = globals()):
    for aa in ss.split(' '): globals[aa] = __import__(aa)
    return identity
  class Namespace(object):
    def __init__(self, **kwds): vars(self).update(kwds)
  @_import('ast builtins collections re ' #### pseudosugar compiler
           'imp importlib importlib.abc importlib.util ' #### import hook
           'locale') ## PYTHON BUG
  class PseudoSugar(ast.NodeVisitor, importlib.abc.Finder, importlib.abc.PyLoader):
    ## convenience function
    @staticmethod
    def exec(ss, globa...

>>> ## compile source to ast
>>> ast_tree1 = compile(source_code1, '', 'exec', ast.PyCF_ONLY_AST)
>>> print( Ast2Src.debugnode(ast_tree1)[:1024], '...' )
   body [<_ast.Import object at 0x9c6ea2c>, <_ast.If object at 0x9c6e7cc>, <_ast.If object at 0x9ab2b0c>, <_ast.If object at 0x9ab2fec>]
   col_offset 0    lineno 2        names [<_ast.alias object at 0x9c6e2ec>, <_ast.alias object at 0x9c6e9ac>]
    asname None     name 'os'
    asname None     name 'sys'
       body [<_ast.Expr object at 0x9ccc92c>, <_ast.Expr object at 0x9ab2acc>] col_offset 0    lineno 3        orelse []       test <_ast.Compare object at 0x9c6eccc>
          col_offset 3    comparators [<_ast.Str object at 0x9ccc9ec>]    left <_ast.Attribute object at 0x9c948cc>       lineno 3        ops [<_ast.NotEq object at 0xb7b3682c>]
        attr 'name'     col_offset 3    ctx <_ast.Load object at 0xb7bb2ccc>    lineno 3        value <_ast.Name object at 0x9ccc46c>
     col_offset 3    ctx <_ast.Load object at 0xb7bb2ccc>    id 'os' lineno 3
     
    
   
   >> ## reverse compile ast back to source
>>> source_code2 = Ast2Src.unparse(ast_tree1)
>>> print( '\n' + re.sub('\n+', '\n', source_code1[:1024]) + '...' )

## import ast2src; reload(ast2src); from ast2src import *
import os, sys
if os.name != 'posix': sys.stderr.write('\nast2src requires linux os\n\n'); exit()
if sys.version_info[:2] != (3, 1): sys.stderr.write('\nast2src requires python3.1\n\n'); exit()
if 1: ###### INIT
  import ast2src as _MODULE
  if '_SETUP' not in globals(): _SETUP = sys.modules.get('ast2src.setup', None)
  def closure(*args, **kwds): return lambda fnc: fnc(*args, **kwds)
  def identity(aa): return aa
  def _import(ss, globals = globals()):
    for aa in ss.split(' '): globals[aa] = __import__(aa)
    return identity
  class Namespace(object):
    def __init__(self, **kwds): vars(self).update(kwds)
  @_import('ast builtins collections re ' #### pseudosugar compiler
           'imp importlib importlib.abc importlib.util ' #### import hook
           'locale') ## PYTHON BUG
  class PseudoSugar(ast.NodeVisitor, importlib.abc.Finder, importlib.abc.PyLoader):
    ## convenience function
    @staticmethod
    def exec(ss, globa...

>>> ## recompile reverse-compiled source
>>> ast_tree2 = compile(source_code2, '', 'exec', ast.PyCF_ONLY_AST)
>>> print( Ast2Src.debugnode(ast_tree2)[:1024], '...' )
   body [<_ast.Import object at 0x9ad7ecc>, <_ast.If object at 0x9b3316c>, <_ast.If object at 0x9b3abcc>, <_ast.If object at 0x9b3ae6c>]
   col_offset 0    lineno 2        names [<_ast.alias object at 0x9c2966c>, <_ast.alias object at 0x9c022ec>]
    asname None     name 'os'
    asname None     name 'sys'
       body [<_ast.Expr object at 0x9b3aaac>, <_ast.Expr object at 0x9b3ab6c>] col_offset 0    lineno 3        orelse []       test <_ast.Compare object at 0x9b332ac>
          col_offset 4    comparators [<_ast.Str object at 0x9b3a80c>]    left <_ast.Attribute object at 0x9b3490c>       lineno 3        ops [<_ast.NotEq object at 0xb7b3682c>]
        attr 'name'     col_offset 4    ctx <_ast.Load object at 0xb7bb2ccc>    lineno 3        value <_ast.Name object at 0x9b3a10c>
     col_offset 4    ctx <_ast.Load object at 0xb7bb2ccc>    id 'os' lineno 3
     
    
   
   

 




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      ast2src-2010.01.21.ast2src.tar.gz
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  2010-01-23
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