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v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 35c8658a74d9b51c6c4755514b02fe3f9d6bb6b8 authored by Amaury Forgeot d'Arc on 17 June 2008, 21:11:29 UTC, committed by Amaury Forgeot d'Arc on 17 June 2008, 21:11:29 UTC
svn+ssh://pythondev@svn.python.org/python/trunk ........ r64119 | andrew.kuchling | 2008-06-11 14:53:14 +0200 (mer., 11 juin 2008) | 1 line Note PEP 371 section ........ r64147 | benjamin.peterson | 2008-06-11 22:04:30 +0200 (mer., 11 juin 2008) | 2 lines update ACKS and NEWs for multiprocessing ........ r64150 | georg.brandl | 2008-06-11 22:28:06 +0200 (mer., 11 juin 2008) | 2 lines Can we agree to put dots at entry ends? Thanks. ........ r64165 | armin.rigo | 2008-06-12 11:50:58 +0200 (jeu., 12 juin 2008) | 3 lines Sounds obvious, but I didn't even realize that you can put non-string keys in type dictionaries without using this locals() hack. ........ r64219 | neal.norwitz | 2008-06-13 08:00:46 +0200 (ven., 13 juin 2008) | 1 line Check for memory alloc failure ........ r64220 | neal.norwitz | 2008-06-13 08:02:26 +0200 (ven., 13 juin 2008) | 3 lines Fix some memory dealloc problems when exceptions occur. It caused: "Fatal Python error: UNREF invalid object" in the DoubleTest. ........ r64221 | neal.norwitz | 2008-06-13 08:03:25 +0200 (ven., 13 juin 2008) | 3 lines Fix typo in method name. The LT class implemented less than. The LE class should implement less than or equal to (as the code does). ........ r64229 | georg.brandl | 2008-06-13 15:26:54 +0200 (ven., 13 juin 2008) | 2 lines Clarification. ........ r64230 | robert.schuppenies | 2008-06-13 15:29:37 +0200 (ven., 13 juin 2008) | 2 lines Fixed: sys.getsizeof does not take the actual length of the tuples into account. ........ r64233 | benjamin.peterson | 2008-06-13 17:11:50 +0200 (ven., 13 juin 2008) | 2 lines platform.uname now tries to fill empty values even when os.uname is present ........ r64235 | benjamin.peterson | 2008-06-13 17:41:09 +0200 (ven., 13 juin 2008) | 1 line set svn:ignore on multiprocessing ........ r64253 | andrew.kuchling | 2008-06-13 21:38:18 +0200 (ven., 13 juin 2008) | 1 line Typo fixes ........ r64278 | martin.v.loewis | 2008-06-14 16:24:47 +0200 (sam., 14 juin 2008) | 2 lines Disable UAC by default. ........ r64280 | gregory.p.smith | 2008-06-14 19:34:09 +0200 (sam., 14 juin 2008) | 3 lines silence the test when it is skipped on some platforms. should fix a buildbot. ........ r64301 | georg.brandl | 2008-06-15 21:54:36 +0200 (dim., 15 juin 2008) | 2 lines Forward-port new test from r64300. ........ r64303 | raymond.hettinger | 2008-06-16 03:42:40 +0200 (lun., 16 juin 2008) | 1 line Issue 3116: fix quadratic behavior in marshal.dumps(). ........ r64320 | georg.brandl | 2008-06-16 23:00:47 +0200 (lun., 16 juin 2008) | 2 lines Add Jesse Noller to the developers list. ........ r64328 | georg.brandl | 2008-06-17 11:01:35 +0200 (mar., 17 juin 2008) | 2 lines Split the HTML index. ........ r64338 | vinay.sajip | 2008-06-17 13:02:14 +0200 (mar., 17 juin 2008) | 1 line Bug #3126: StreamHandler and FileHandler check before calling "flush" and "close" that the stream object has these, using hasattr (thanks to bobf for the patch). ........ r64339 | vinay.sajip | 2008-06-17 13:04:02 +0200 (mar., 17 juin 2008) | 1 line Updated with fix for #3126. ........
1 parent 6a00b64
Tip revision: 35c8658a74d9b51c6c4755514b02fe3f9d6bb6b8 authored by Amaury Forgeot d'Arc on 17 June 2008, 21:11:29 UTC
Merged revisions 64119,64147,64150,64165,64219-64221,64229-64230,64233,64235,64253,64278,64280,64301,64303,64320,64328,64338-64339 via svnmerge from
Merged revisions 64119,64147,64150,64165,64219-64221,64229-64230,64233,64235,64253,64278,64280,64301,64303,64320,64328,64338-64339 via svnmerge from
Tip revision: 35c8658
symtable.py
"""Interface to the compiler's internal symbol tables"""
import _symtable
from _symtable import USE, DEF_GLOBAL, DEF_LOCAL, DEF_PARAM, \
DEF_STAR, DEF_DOUBLESTAR, DEF_INTUPLE, DEF_FREE, \
DEF_FREE_GLOBAL, DEF_FREE_CLASS, DEF_IMPORT, DEF_BOUND, \
OPT_IMPORT_STAR
import weakref
__all__ = ["symtable", "SymbolTable", "newSymbolTable", "Class",
"Function", "Symbol"]
def symtable(code, filename, compile_type):
raw = _symtable.symtable(code, filename, compile_type)
for top in raw.values():
if top.name == 'top':
break
return newSymbolTable(top, filename)
class SymbolTableFactory:
def __init__(self):
self.__memo = weakref.WeakValueDictionary()
def new(self, table, filename):
if table.type == _symtable.TYPE_FUNCTION:
return Function(table, filename)
if table.type == _symtable.TYPE_CLASS:
return Class(table, filename)
return SymbolTable(table, filename)
def __call__(self, table, filename):
key = table, filename
obj = self.__memo.get(key, None)
if obj is None:
obj = self.__memo[key] = self.new(table, filename)
return obj
newSymbolTable = SymbolTableFactory()
def is_free(flags):
if (flags & (USE | DEF_FREE)) \
and (flags & (DEF_LOCAL | DEF_PARAM | DEF_GLOBAL)):
return True
if flags & DEF_FREE_CLASS:
return True
return False
class SymbolTable:
def __init__(self, raw_table, filename):
self._table = raw_table
self._filename = filename
self._symbols = {}
def __repr__(self):
if self.__class__ == SymbolTable:
kind = ""
else:
kind = "%s " % self.__class__.__name__
if self._table.name == "global":
return "<%sSymbolTable for module %s>" % (kind, self._filename)
else:
return "<%sSymbolTable for %s in %s>" % (kind, self._table.name,
self._filename)
def get_type(self):
if self._table.type == _symtable.TYPE_MODULE:
return "module"
if self._table.type == _symtable.TYPE_FUNCTION:
return "function"
if self._table.type == _symtable.TYPE_CLASS:
return "class"
assert self._table.type in (1, 2, 3), \
"unexpected type: %s" % self._table.type
def get_id(self):
return self._table.id
def get_name(self):
return self._table.name
def get_lineno(self):
return self._table.lineno
def is_optimized(self):
return bool(self._table.type == _symtable.TYPE_FUNCTION
and not self._table.optimized)
def is_nested(self):
return bool(self._table.nested)
def has_children(self):
return bool(self._table.children)
def has_exec(self):
"""Return true if the scope uses exec. Deprecated method."""
return False
def has_import_star(self):
"""Return true if the scope uses import *"""
return bool(self._table.optimized & OPT_IMPORT_STAR)
def get_identifiers(self):
return self._table.symbols.keys()
def lookup(self, name):
sym = self._symbols.get(name)
if sym is None:
flags = self._table.symbols[name]
namespaces = self.__check_children(name)
sym = self._symbols[name] = Symbol(name, flags, namespaces)
return sym
def get_symbols(self):
return [self.lookup(ident) for ident in self.get_identifiers()]
def __check_children(self, name):
return [newSymbolTable(st, self._filename)
for st in self._table.children
if st.name == name]
def get_children(self):
return [newSymbolTable(st, self._filename)
for st in self._table.children]
class Function(SymbolTable):
# Default values for instance variables
__params = None
__locals = None
__frees = None
__globals = None
def __idents_matching(self, test_func):
return tuple([ident for ident in self.get_identifiers()
if test_func(self._table.symbols[ident])])
def get_parameters(self):
if self.__params is None:
self.__params = self.__idents_matching(lambda x:x & DEF_PARAM)
return self.__params
def get_locals(self):
if self.__locals is None:
self.__locals = self.__idents_matching(lambda x:x & DEF_BOUND)
return self.__locals
def get_globals(self):
if self.__globals is None:
glob = DEF_GLOBAL | DEF_FREE_GLOBAL
self.__globals = self.__idents_matching(lambda x:x & glob)
return self.__globals
def get_frees(self):
if self.__frees is None:
self.__frees = self.__idents_matching(is_free)
return self.__frees
class Class(SymbolTable):
__methods = None
def get_methods(self):
if self.__methods is None:
d = {}
for st in self._table.children:
d[st.name] = 1
self.__methods = tuple(d)
return self.__methods
class Symbol:
def __init__(self, name, flags, namespaces=None):
self.__name = name
self.__flags = flags
self.__namespaces = namespaces or ()
def __repr__(self):
return "<symbol '%s'>" % self.__name
def get_name(self):
return self.__name
def is_referenced(self):
return bool(self.__flags & _symtable.USE)
def is_parameter(self):
return bool(self.__flags & DEF_PARAM)
def is_global(self):
return bool((self.__flags & DEF_GLOBAL)
or (self.__flags & DEF_FREE_GLOBAL))
def is_vararg(self):
return bool(self.__flags & DEF_STAR)
def is_keywordarg(self):
return bool(self.__flags & DEF_DOUBLESTAR)
def is_local(self):
return bool(self.__flags & DEF_BOUND)
def is_free(self):
if (self.__flags & (USE | DEF_FREE)) \
and (self.__flags & (DEF_LOCAL | DEF_PARAM | DEF_GLOBAL)):
return True
if self.__flags & DEF_FREE_CLASS:
return True
return False
def is_imported(self):
return bool(self.__flags & DEF_IMPORT)
def is_assigned(self):
return bool(self.__flags & DEF_LOCAL)
def is_in_tuple(self):
return bool(self.__flags & DEF_INTUPLE)
def is_namespace(self):
"""Returns true if name binding introduces new namespace.
If the name is used as the target of a function or class
statement, this will be true.
Note that a single name can be bound to multiple objects. If
is_namespace() is true, the name may also be bound to other
objects, like an int or list, that does not introduce a new
namespace.
"""
return bool(self.__namespaces)
def get_namespaces(self):
"""Return a list of namespaces bound to this name"""
return self.__namespaces
def get_namespace(self):
"""Returns the single namespace bound to this name.
Raises ValueError if the name is bound to multiple namespaces.
"""
if len(self.__namespaces) != 1:
raise ValueError("name is bound to multiple namespaces")
return self.__namespaces[0]
if __name__ == "__main__":
import os, sys
src = open(sys.argv[0]).read()
mod = symtable(src, os.path.split(sys.argv[0])[1], "exec")
for ident in mod.get_identifiers():
info = mod.lookup(ident)
print(info, info.is_local(), info.is_namespace())
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