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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
asyncio	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
collections	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
concurrent	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
config-3.8-x86_64-linux-gnu	[ DIR ]	drwxr-xr-x	2024-10-29 08:54
ctypes	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
curses	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
dbm	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
distutils	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
email	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
encodings	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
ensurepip	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
html	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
http	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
importlib	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
json	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
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multiprocessing	[ DIR ]	drwxr-xr-x	2024-10-29 08:46
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functools.py	36.53 KB	-rw-r--r--	2024-09-06 20:41
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ipaddress.py	73.14 KB	-rw-r--r--	2024-09-06 20:41
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numbers.py	10 KB	-rw-r--r--	2024-09-06 20:41
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pathlib.py	51.38 KB	-rw-r--r--	2024-09-06 20:41
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pickle.py	62.96 KB	-rw-r--r--	2024-09-06 20:41
pickletools.py	91.29 KB	-rw-r--r--	2024-09-06 20:41
pipes.py	8.71 KB	-rw-r--r--	2024-09-06 20:41
pkgutil.py	21 KB	-rw-r--r--	2024-09-06 20:41
platform.py	39.49 KB	-rwxr-xr-x	2024-09-06 20:41
plistlib.py	31.46 KB	-rw-r--r--	2024-09-06 20:41
poplib.py	14.72 KB	-rw-r--r--	2024-09-06 20:41
posixpath.py	15.26 KB	-rw-r--r--	2024-09-06 20:41
pprint.py	20.98 KB	-rw-r--r--	2024-09-06 20:41
profile.py	23.01 KB	-rwxr-xr-x	2024-09-06 20:41
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pydoc.py	104.2 KB	-rw-r--r--	2024-09-23 11:26
queue.py	11.09 KB	-rw-r--r--	2024-09-06 20:41
quopri.py	7.09 KB	-rwxr-xr-x	2024-09-06 20:41
random.py	28.13 KB	-rw-r--r--	2024-09-06 20:41
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reprlib.py	5.14 KB	-rw-r--r--	2024-09-06 20:41
rlcompleter.py	6.93 KB	-rw-r--r--	2024-09-06 20:41
runpy.py	11.77 KB	-rw-r--r--	2024-09-06 20:41
sched.py	6.29 KB	-rw-r--r--	2024-09-06 20:41
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signal.py	2.22 KB	-rw-r--r--	2024-09-06 20:41
site.py	21.36 KB	-rw-r--r--	2024-09-23 11:15
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sndhdr.py	6.93 KB	-rw-r--r--	2024-09-06 20:41
socket.py	34.63 KB	-rw-r--r--	2024-09-06 20:41
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sre_constants.py	6.99 KB	-rw-r--r--	2024-09-06 20:41
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ssl.py	51.3 KB	-rw-r--r--	2024-09-06 20:41
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statistics.py	38.76 KB	-rw-r--r--	2024-09-06 20:41
string.py	10.29 KB	-rw-r--r--	2024-09-06 20:41
stringprep.py	12.61 KB	-rw-r--r--	2024-09-06 20:41
struct.py	257 B	-rw-r--r--	2024-09-06 20:41
subprocess.py	76.42 KB	-rw-r--r--	2024-09-06 20:41
sunau.py	17.94 KB	-rw-r--r--	2024-09-06 20:41
symbol.py	2.06 KB	-rw-r--r--	2024-09-23 11:18
symtable.py	7.83 KB	-rw-r--r--	2024-09-06 20:41
sysconfig.py	24.31 KB	-rw-r--r--	2024-09-23 11:15
tabnanny.py	11.15 KB	-rwxr-xr-x	2024-09-06 20:41
tarfile.py	103.55 KB	-rwxr-xr-x	2024-09-06 20:41
telnetlib.py	22.71 KB	-rw-r--r--	2024-09-06 20:41
tempfile.py	27.17 KB	-rw-r--r--	2024-09-06 20:41
textwrap.py	18.95 KB	-rw-r--r--	2024-09-06 20:41
this.py	1003 B	-rw-r--r--	2024-09-06 20:41
threading.py	49.63 KB	-rw-r--r--	2024-09-06 20:41
timeit.py	13.18 KB	-rwxr-xr-x	2024-09-06 20:41
token.py	2.31 KB	-rw-r--r--	2024-09-06 20:41
tokenize.py	25.24 KB	-rw-r--r--	2024-09-06 20:41
trace.py	29.18 KB	-rwxr-xr-x	2024-09-06 20:41
traceback.py	23.06 KB	-rw-r--r--	2024-09-06 20:41
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uuid.py	29.75 KB	-rw-r--r--	2024-09-06 20:41
warnings.py	19.23 KB	-rw-r--r--	2024-09-06 20:41
wave.py	17.8 KB	-rw-r--r--	2024-09-06 20:41
weakref.py	20.89 KB	-rw-r--r--	2024-09-06 20:41
webbrowser.py	23.53 KB	-rwxr-xr-x	2024-09-06 20:41
xdrlib.py	5.77 KB	-rw-r--r--	2024-09-06 20:41
zipapp.py	7.36 KB	-rw-r--r--	2024-09-06 20:41
zipfile.py	86.4 KB	-rw-r--r--	2024-09-06 20:41
zipimport.py	30.04 KB	-rw-r--r--	2024-09-06 20:41

Rename

"""Interface to the compiler's internal symbol tables"""

import _symtable
from _symtable import (USE, DEF_GLOBAL, DEF_NONLOCAL, DEF_LOCAL, DEF_PARAM,
     DEF_IMPORT, DEF_BOUND, DEF_ANNOT, SCOPE_OFF, SCOPE_MASK, FREE,
     LOCAL, GLOBAL_IMPLICIT, GLOBAL_EXPLICIT, CELL)

import weakref

__all__ = ["symtable", "SymbolTable", "Class", "Function", "Symbol"]

def symtable(code, filename, compile_type):
    top = _symtable.symtable(code, filename, compile_type)
    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()

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 == "top":
            return "<{0}SymbolTable for module {1}>".format(kind, self._filename)
        else:
            return "<{0}SymbolTable for {1} in {2}>".format(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: {0}".format(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)

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 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)
            module_scope = (self._table.name == "top")
            sym = self._symbols[name] = Symbol(name, flags, namespaces,
                                               module_scope=module_scope)
        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
    __nonlocals = 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:
            locs = (LOCAL, CELL)
            test = lambda x: ((x >> SCOPE_OFF) & SCOPE_MASK) in locs
            self.__locals = self.__idents_matching(test)
        return self.__locals

def get_globals(self):
        if self.__globals is None:
            glob = (GLOBAL_IMPLICIT, GLOBAL_EXPLICIT)
            test = lambda x:((x >> SCOPE_OFF) & SCOPE_MASK) in glob
            self.__globals = self.__idents_matching(test)
        return self.__globals

def get_nonlocals(self):
        if self.__nonlocals is None:
            self.__nonlocals = self.__idents_matching(lambda x:x & DEF_NONLOCAL)
        return self.__nonlocals

def get_frees(self):
        if self.__frees is None:
            is_free = lambda x:((x >> SCOPE_OFF) & SCOPE_MASK) == FREE
            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, *, module_scope=False):
        self.__name = name
        self.__flags = flags
        self.__scope = (flags >> SCOPE_OFF) & SCOPE_MASK # like PyST_GetScope()
        self.__namespaces = namespaces or ()
        self.__module_scope = module_scope

def __repr__(self):
        return "<symbol {0!r}>".format(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 *True* if the sysmbol is global.
        """
        return bool(self.__scope in (GLOBAL_IMPLICIT, GLOBAL_EXPLICIT)
                    or (self.__module_scope and self.__flags & DEF_BOUND))

def is_nonlocal(self):
        return bool(self.__flags & DEF_NONLOCAL)

def is_declared_global(self):
        return bool(self.__scope == GLOBAL_EXPLICIT)

def is_local(self):
        """Return *True* if the symbol is local.
        """
        return bool(self.__scope in (LOCAL, CELL)
                    or (self.__module_scope and self.__flags & DEF_BOUND))

def is_annotated(self):
        return bool(self.__flags & DEF_ANNOT)

def is_free(self):
        return bool(self.__scope == FREE)

def is_imported(self):
        return bool(self.__flags & DEF_IMPORT)

def is_assigned(self):
        return bool(self.__flags & DEF_LOCAL)

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
    with open(sys.argv[0]) as f:
        src = f.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())