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"""
Plain Python definition of the builtin functions related to run-time
program introspection.
"""
import sys
from __pypy__ import lookup_special
def _caller_locals():
return sys._getframe(0).f_locals
def vars(*obj):
"""Return a dictionary of all the attributes currently bound in obj. If
called with no argument, return the variables bound in local scope."""
if len(obj) == 0:
return _caller_locals()
elif len(obj) != 1:
raise TypeError("vars() takes at most 1 argument.")
try:
return obj[0].__dict__
except AttributeError:
raise TypeError("vars() argument must have __dict__ attribute")
# These are defined in the types module, but we cannot always import it.
# virtualenv when run with -S for instance. Instead, copy the code to create
# the needed types to be checked.
class types(object):
class _C:
def _m(self): pass
ModuleType = type(sys)
ClassType = type(_C)
TypeType = type
_x = _C()
InstanceType = type(_x)
def dir(*args):
"""dir([object]) -> list of strings
Return an alphabetized list of names comprising (some of) the attributes
of the given object, and of attributes reachable from it:
No argument: the names in the current scope.
Module object: the module attributes.
Type or class object: its attributes, and recursively the attributes of
its bases.
Otherwise: its attributes, its class's attributes, and recursively the
attributes of its class's base classes.
"""
if len(args) > 1:
raise TypeError("dir expected at most 1 arguments, got %d" % len(args))
if len(args) == 0:
return sorted(_caller_locals().keys()) # 2 stackframes away
obj = args[0]
dir_meth = lookup_special(obj, '__dir__')
if dir_meth is not None:
# obscure: lookup_special won't bind None.__dir__!
result = dir_meth(obj) if obj is None else dir_meth()
# Will throw TypeError if not iterable
return sorted(result)
# we should never reach here since object.__dir__ exists
return []
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