kodjo
7dcaa9c111
Fixed #77 : Parser: ShortTermMemoryParser should be called separately Fixed #78 : Remove VariableNode usage Fixed #79 : ConceptManager: Implement compile caching Fixed #80 : SheerkaExecute : parsers_key is not correctly computed Fixed #81 : ValidateConceptEvaluator : Validate concept's where and pre clauses right after the parsing Fixed #82 : SheerkaIsAManager: isa() failed when the set as a body Fixed #83 : ValidateConceptEvaluator : Support BNF and SYA Concepts Fixed #84 : ExpressionParser: Implement the parser as a standard parser Fixed #85 : Services: Give order to services Fixed #86 : cannot manage smart_get_attr(the short, color)
246 lines
10 KiB
Python
246 lines
10 KiB
Python
import ast
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import copy
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import traceback
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from dataclasses import dataclass, field
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import core.builtin_helpers
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import core.utils
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from core.ast_helpers import UnreferencedNamesVisitor, NamesWithAttributesVisitor
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from core.builtin_concepts import BuiltinConcepts, ParserResultConcept
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from core.concept import ConceptParts, Concept
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from core.global_symbols import NotInit, ErrorObj
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from core.sheerka.services.SheerkaMemory import SheerkaMemory
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from evaluators.BaseEvaluator import OneReturnValueEvaluator
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from parsers.PythonParser import PythonNode
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from sheerkapython.python_wrapper import create_namespace, MethodAccessError
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@dataclass
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class PythonEvalError(ErrorObj):
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error: Exception
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source: str
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traceback: str = field(repr=False)
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concepts: dict = field(repr=False)
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def __eq__(self, other):
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if id(self) == id(other):
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return True
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if not isinstance(other, PythonEvalError):
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return False
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return isinstance(self.error, type(other.error)) and \
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self.source == other.source and \
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self.traceback == other.traceback and \
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self.concepts == other.concepts
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def __hash__(self):
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return hash(self.error)
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def get_error(self):
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return self.error
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class PythonEvaluator(OneReturnValueEvaluator):
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NAME = "Python"
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"""
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Evaluate a Python node, ie, evaluate some Python code
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"""
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isinstance = None
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def __init__(self):
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super().__init__(self.NAME, [BuiltinConcepts.EVALUATION], 50)
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self.isinstance = None
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@staticmethod
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def initialize(sheerka):
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from core.sheerka.services.SheerkaAdmin import SheerkaAdmin
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PythonEvaluator.isinstance = sheerka.services[SheerkaAdmin.NAME].extended_isinstance
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def matches(self, context, return_value):
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if not return_value.status or not isinstance(return_value.value, ParserResultConcept):
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return False
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body = return_value.value.value
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return isinstance(body, PythonNode) or hasattr(body, "python_node")
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def eval(self, context, return_value):
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sheerka = context.sheerka
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node = return_value.value.value.get_python_node()
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debugger = context.get_debugger(PythonEvaluator.NAME, "eval")
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debugger.debug_entering(node=node)
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exception_debugger = context.get_debugger("Exceptions", PythonEvaluator.NAME + "-eval")
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get_trace_back = exception_debugger.is_enabled()
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context.log(f"Evaluating python node {node}.", self.name)
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# If we evaluate a Concept metadata which is NOT the body ex (pre, post, where...)
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# or if EVAL_QUESTION_REQUESTED is explicit
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# We need to disable the functions that may alter the state
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# It's a poor way to have source code security check
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expression_only = context.in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED) or \
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context.in_context(BuiltinConcepts.VALIDATION_ONLY_REQUESTED)
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if not expression_only:
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attr_under_eval = context.get_parents(lambda ec: ec.action == BuiltinConcepts.EVALUATING_ATTRIBUTE)
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if attr_under_eval:
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attr_under_eval = attr_under_eval[0]
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expression_only = attr_under_eval.action_context != ConceptParts.BODY
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# get globals
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try:
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my_globals = self.get_globals(context, node, expression_only)
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debugger.debug_var("globals", my_globals)
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except MethodAccessError as ex:
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# Quick and dirty,
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# When VALIDATION_ONLY_REQUESTED is enabled, it's normal to have some NameError exceptions
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if context.in_context(BuiltinConcepts.VALIDATION_ONLY_REQUESTED):
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return sheerka.ret(self.name, False, BuiltinConcepts.METHOD_ACCESS_ERROR, parents=[return_value])
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eval_error = PythonEvalError(ex,
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node.source,
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traceback.format_exc() if get_trace_back else None,
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None)
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return sheerka.ret(self.name, False, sheerka.err(eval_error), parents=[return_value])
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all_possible_globals = self.get_all_possible_globals(context, my_globals)
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concepts_entries = None # entries in globals_ that refers to Concept objects
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evaluated = NotInit
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errors = []
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expect_success = context.in_context(BuiltinConcepts.EVAL_UNTIL_SUCCESS_REQUESTED)
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for globals_ in all_possible_globals:
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try:
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# eval
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my_locals = {}
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if isinstance(node.ast_, ast.Expression):
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context.log("Evaluating using 'eval'.", self.name)
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evaluated = eval(node.get_compiled(), globals_, my_locals)
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else:
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context.log("Evaluating using 'exec'.", self.name)
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evaluated = self.exec_with_return(node.ast_, globals_, my_locals)
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for k, v in my_locals.items():
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sheerka.services[SheerkaMemory.NAME].add_to_memory(context, k, v)
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if not expect_success or evaluated:
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break # in this first version, we stop once a success is found
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except Exception as ex:
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if concepts_entries is None:
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concepts_entries = self.get_concepts_entries_from_globals(my_globals)
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eval_error = PythonEvalError(ex,
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node.source,
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traceback.format_exc() if get_trace_back else None,
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self.get_concepts_values_from_globals(globals_, concepts_entries))
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errors.append(eval_error)
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exception_debugger.debug_var("exception", eval_error.error, is_error=True)
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exception_debugger.debug_var("source", eval_error.source, is_error=True)
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exception_debugger.debug_var("trace", eval_error.traceback, is_error=True)
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if evaluated == NotInit:
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if len(errors) == 1:
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context.log_error(errors[0].error, who=self.name, exc=errors[0].traceback)
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return sheerka.ret(self.name, False, sheerka.err(errors[0]), parents=[return_value])
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if len(errors) > 1:
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for eval_error in errors:
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context.log_error(eval_error.error, who=self.name, exc=eval_error.traceback)
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return sheerka.ret(self.name, False, sheerka.err(errors), parents=[return_value])
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context.log(f"{evaluated=}", self.name)
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debugger.debug_var("ret", evaluated)
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if sheerka.isinstance(evaluated, BuiltinConcepts.RETURN_VALUE):
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return sheerka.ret(self.name, evaluated.status, evaluated.body, parents=[return_value, evaluated])
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else:
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return sheerka.ret(self.name, True, evaluated, parents=[return_value])
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def get_globals(self, context, node, expression_only):
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"""
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Creates the globals variables
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:param context:
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:param node:
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:param expression_only:
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:return:
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"""
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unreferenced_names_visitor = UnreferencedNamesVisitor(context)
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names = unreferenced_names_visitor.get_names(node.ast_)
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if "sheerka" in names:
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sheerka_names = set()
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visitor = NamesWithAttributesVisitor()
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for sequence in visitor.get_sequences(node.ast_, "sheerka"):
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if len(sequence) > 1:
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sheerka_names.add(sequence[1])
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else:
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sheerka_names = None
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return create_namespace(context, self.name, names, sheerka_names, node.objects, expression_only)
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@staticmethod
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def get_all_possible_globals(context, my_globals):
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"""
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From a dictionary of globals (str, obj)
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Creates as many globals as there are combination between a concept and its body
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Example:
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if the entry 'foo': Concept("foo", body="something")
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2 globals will be created
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one with foo: Concept("foo") # we keep the concept as an object
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one with foo: 'something' # we substitute its value
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:param context:
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:param my_globals:
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:return:
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"""
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# first pass, get all the non concepts or concepts with no body
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# Note that we consider that all concepts are evaluated
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# In the future, it may be a good optimisation to defer the evaluation of the body
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# until the python evaluation fails
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fixed_values = {}
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concepts_with_body = {}
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for k, v in my_globals.items():
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if not isinstance(v, Concept) or context.sheerka.objvalue(v) == v:
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fixed_values[k] = v
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else:
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concepts_with_body[k] = v
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# make the product the rest as cartesian product
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res = [fixed_values]
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for k, v in concepts_with_body.items():
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res = core.utils.dict_product(res, [{k: v}, {k: context.sheerka.objvalue(v)}])
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return res
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@staticmethod
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def get_concepts_entries_from_globals(my_globals):
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return [k for k, v in my_globals.items() if isinstance(v, Concept)]
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@staticmethod
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def get_concepts_values_from_globals(my_globals, names):
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return {name: my_globals[name] for name in names}
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@staticmethod
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def expr_to_expression(expr):
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expr.lineno = 0
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expr.col_offset = 0
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result = ast.Expression(expr.value, lineno=0, col_offset=0)
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return result
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@staticmethod
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def exec_with_return(code_ast, my_globals, my_locals):
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init_ast = copy.deepcopy(code_ast)
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init_ast.body = code_ast.body[:-1]
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last_ast = copy.deepcopy(code_ast)
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last_ast.body = code_ast.body[-1:]
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exec(compile(init_ast, "<ast>", "exec"), my_globals, my_locals)
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if type(last_ast.body[0]) == ast.Expr:
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return eval(compile(PythonEvaluator.expr_to_expression(last_ast.body[0]), "<ast>", "eval"),
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my_globals,
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my_locals)
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else:
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exec(compile(last_ast, "<ast>", "exec"), my_globals, my_locals)
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