def _get_ast_str(self, top):
if not self._cache.is_empty(
): # Data already computed and cached; could a "false-like" cached value
return str(self._cache._data) if self._cache.is_scalar(
) else self._cache._id
if self._cache._id is not None:
return self._cache._id # Data already computed under ID, but not cached
assert isinstance(self._children, tuple)
exec_str = "({} {})".format(
self._op,
" ".join([ExprNode._arg_to_expr(ast) for ast in self._children]))
def is_ast_expr(ref):
return isinstance(ref, list) and any(
map(lambda r: isinstance(r, ASTId), ref))
referrers = gc.get_referrers(self)
# removing frames from the referrers to get a consistent behaviour accross Py versions
# as stack frames don't appear in the referrers from Py 3.7.
# also removing the AST expressions built in astfun.py
# as they keep a reference to self if the lambda itself is using a free variable.
proper_ref = [
r for r in referrers if not (inspect.isframe(r) or is_ast_expr(r))
]
ref_cnt = len(proper_ref)
del referrers, proper_ref
# if this self node is referenced by at least one other node (nested expr), then create a tmp frame
if top or ref_cnt > 1:
self._cache._id = _py_tmp_key(append=h2o.connection().session_id)
exec_str = "(tmp= {} {})".format(self._cache._id, exec_str)
return exec_str
def _do_it(self, top):
if not self._cache.is_empty(): # Data already computed and cached; could a "false-like" cached value
return str(self._cache._data) if self._cache.is_scalar() else self._cache._id
if self._cache._id is not None: return self._cache._id # Data already computed under ID, but not cached
# assert isinstance(self._children,tuple)
exec_str = "({} {})".format(self._op, " ".join([ExprNode._arg_to_expr(ast) for ast in self._children]))
gc_ref_cnt = len(gc.get_referrers(self))
if top or gc_ref_cnt >= ExprNode.MAGIC_REF_COUNT:
self._cache._id = _py_tmp_key(append=h2o.conn().session_id)
exec_str = "(tmp= {} {})".format(self._cache._id, exec_str)
return exec_str
def _get_ast_str(self, top):
if not self._cache.is_empty(): # Data already computed and cached; could a "false-like" cached value
return str(self._cache._data) if self._cache.is_scalar() else self._cache._id
if self._cache._id is not None:
return self._cache._id # Data already computed under ID, but not cached
# assert isinstance(self._children,tuple)
exec_str = "({} {})".format(self._op, " ".join([ExprNode._arg_to_expr(ast) for ast in self._children]))
gc_ref_cnt = len(gc.get_referrers(self))
if top or gc_ref_cnt >= ExprNode.MAGIC_REF_COUNT:
self._cache._id = _py_tmp_key(append=h2o.connection().session_id)
exec_str = "(tmp= {} {})".format(self._cache._id, exec_str)
return exec_str