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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
asyncio	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
collections	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
concurrent	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
config-3.7m	[ DIR ]	drwxr-xr-x	2024-05-21 08:57
ctypes	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
curses	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
dbm	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
distutils	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
email	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
encodings	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
ensurepip	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
html	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
http	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
idlelib	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
importlib	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
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multiprocessing	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
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urllib	[ DIR ]	drwxr-xr-x	2024-05-21 08:43
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pickletools.py	89.08 KB	-rw-r--r--	2024-04-17 17:36
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pkgutil.py	20.96 KB	-rw-r--r--	2024-04-17 17:36
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queue.py	11.09 KB	-rw-r--r--	2024-04-17 17:36
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subprocess.py	70.95 KB	-rw-r--r--	2024-04-17 17:36
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symbol.py	2.09 KB	-rwxr-xr-x	2024-04-17 17:36
symtable.py	7.11 KB	-rw-r--r--	2024-04-17 17:36
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this.py	1003 B	-rw-r--r--	2024-04-17 17:36
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Rename

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

import _symtable
from _symtable import (USE, DEF_GLOBAL, 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(object):

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 "<{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)
            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:
            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_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(object):

def __init__(self, name, flags, namespaces=None):
        self.__name = name
        self.__flags = flags
        self.__scope = (flags >> SCOPE_OFF) & SCOPE_MASK # like PyST_GetScope()
        self.__namespaces = namespaces or ()

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 bool(self.__scope in (GLOBAL_IMPLICIT, GLOBAL_EXPLICIT))

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

def is_local(self):
        return bool(self.__scope in (LOCAL, CELL))

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())