def test_load_program(self, state: PushState, atoms):
prog = CodeBlock.from_list([atoms["5"], atoms["5"], atoms["add"]])
state.load_program(prog)
assert state.size() == 1
assert len(state["exec"].top()) == 3
class PushInterpreter:
"""An interpreter capable of running Push programs.
Parameters
----------
instruction_set : Union[InstructionSet, str], optional
The InstructionSet to use for executing programs. Default is "core"
which instansiates an InstructionSet using all the core instructions.
config : PushInterpreterConfig, optional
A PushInterpreterConfig specifying limits and early termination
conditions. Default is None, which creates a config will all default
values.
Attributes
----------
instruction_set : InstructionSet
The InstructionSet to use for executing programs.
config : PushInterpreterConfig
A PushInterpreterConfig specifying limits and early termination
conditions.
state : PushState
The current PushState. Contains one stack for each PushType utilized
mentioned by the instructions in the instruction set.
status : PushInterpreterStatus
A string denoting if the Interpreter has enountered a situation
where non-standard termination was required.
"""
def __init__(self,
instruction_set: Union[InstructionSet, str] = "core",
config: PushInterpreterConfig = None):
# If no instruction set given, create one and register all instructions.
if instruction_set == "core":
self.instruction_set = InstructionSet(register_all=True)
else:
self.instruction_set = instruction_set
self._supported_types = self.instruction_set.supported_types()
if config is None:
self.config = PushInterpreterConfig()
else:
self.config = config
# Initialize the PushState and status
self.reset()
def reset(self):
"""Reset the interpreter status and PushState."""
self.state = PushState(self._supported_types)
self.status = PushInterpreterStatus.normal
def _evaluate_instruction(self, instruction: Union[Instruction,
JitInstructionRef]):
self.state = instruction.evaluate(self.state, self.config)
def evaluate_atom(self, atom: Atom):
"""Evaluate an Atom.
Parameters
----------
atom : Atom
The Atom (Literal, Instruction, JitInstructionRef, or CodeBlock) to
evaluate against the current PushState.
"""
try:
if isinstance(atom, Instruction):
self._evaluate_instruction(atom)
elif isinstance(atom, JitInstructionRef):
self._evaluate_instruction(self.instruction_set[atom.name])
elif isinstance(atom, CodeBlock):
for a in atom[::-1]:
self.state["exec"].push(a)
elif isinstance(atom, Literal):
self.state[atom.push_type.name].push(atom.value)
elif isinstance(atom, Closer):
raise PushError(
"Closers should not be in push programs. Only genomes.")
else:
raise PushError(
"Cannont evaluate {t}, require a subclass of Atom".format(
t=type(atom)))
except Exception as e:
err_type = type(e).__name__
err_msg = str(e)
raise PushError(
"{t} raised while evaluating {atom}. Origional mesage: \"{m}\""
.format(t=err_type, atom=atom, m=err_msg))
def run(self,
program: CodeBlock,
inputs: Sequence,
output_types: Sequence[str],
verbosity_config: VerbosityConfig = None):
"""Run a Push program given some inputs and desired output PushTypes.
The general flow of this method is:
1. Create a new push state
2. Load the program and inputs.
3. If the exec stack is empty, return the outputs.
4. Else, pop the exec stack and process the atom.
5. Return to step 3.
Parameters
----------
program
Program to run.
inputs
A sequence of values to use as inputs to the push program.
output_types
A secence of values that denote the Pushtypes of the expected
outputs of the push program.
verbosity_config : VerbosityConfig, optional
A VerbosityConfig controling what is logged during the execution
of the program. Default is no verbosity.
Returns
-------
Sequence
A sequence of values pulled from the final push state. May contain
pyshgp.utils.Token.no_stack_item if needed stacks are empty.
"""
if self.config.reset_on_run:
self.reset()
self.state.load_program(program)
self.state.load_inputs(inputs)
stop_time = time.time() + self.config.runtime_limit
steps = 0
if verbosity_config is None:
verbosity_config = DEFAULT_VERBOSITY_LEVELS[0]
verbose_trace = verbosity_config.program_trace
if verbose_trace:
verbose_trace("Initial State:")
self.state.pretty_print(verbose_trace)
while len(self.state["exec"]) > 0:
if steps > self.config.atom_limit:
self.status = PushInterpreterStatus.atom_limit_exceeded
break
if time.time() > stop_time:
self.status = PushInterpreterStatus.runtime_limit_exceeded
break
next_atom = self.state["exec"].pop()
if verbose_trace:
verbose_trace("Current Atom: " + str(next_atom))
old_size = len(self.state)
self.evaluate_atom(next_atom)
if len(self.state) > old_size + self.config.growth_cap:
self.status = PushInterpreterStatus.growth_cap_exceeded
break
if verbose_trace:
verbose_trace("Current State:")
self.state.pretty_print(verbose_trace)
steps += 1
if verbose_trace:
verbose_trace("Finished program evaluation.")
return self.state.observe_stacks(output_types)
def test_load_program(self, state: PushState, atoms):
prog = CodeBlock.from_list([atoms["5"], atoms["5"], atoms["add"]])
state.load_program(prog)
assert state.size() == 1
assert len(state["exec"].top()) == 3
class PushInterpreter:
"""An interpreter capable of running Push programs.
Parameters
----------
instruction_set : Union[InstructionSet, str], optional
The InstructionSet to use for executing programs. Default is "core"
which instansiates an InstructionSet using all the core instructions.
config : PushInterpreterConfig, optional
A PushInterpreterConfig specifying limits and early termination
conditions. Default is None, which creates a config will all default
values.
verbosity_config : VerbosityConfig, optional
A VerbosityConfig controling what is logged during the execution
of the program. Default is no verbosity.
Attributes
----------
instruction_set : InstructionSet
The InstructionSet to use for executing programs.
config : PushInterpreterConfig
A PushInterpreterConfig specifying limits and early termination
conditions.
verbosity_config : VerbosityConfig, optional
A VerbosityConfig controling what is logged during the execution
of the program. Default is no verbosity.
state : PushState
The current PushState. Contains one stack for each PushType utilized
mentioned by the instructions in the instruction set.
status : PushInterpreterStatus
A string denoting if the Interpreter has enountered a situation
where non-standard termination was required.
"""
def __init__(self,
instruction_set: Union[InstructionSet, str] = "core",
config: PushInterpreterConfig = None,
verbosity_config: VerbosityConfig = "default"):
# If no instruction set given, create one and register all instructions.
if instruction_set == "core":
self.instruction_set = InstructionSet(register_core=True)
else:
self.instruction_set = instruction_set
self.type_library = self.instruction_set.type_library
if config is None:
self.config = PushInterpreterConfig()
else:
self.config = config
if verbosity_config == "default":
self.verbosity_config = DEFAULT_VERBOSITY_LEVELS[0]
else:
self.verbosity_config = verbosity_config
# Initialize the PushState and status
self._validate()
self.reset()
def _validate(self):
library_type_names = set(self.type_library.keys())
required_stacks = self.instruction_set.required_stacks() - {"stdout", "exec", "untyped"}
if not required_stacks <= library_type_names:
raise ValueError(
"PushInterpreter instruction_set and type_library are incompatible. {iset} vs {tlib}. Diff: {d}".format(
iset=required_stacks,
tlib=library_type_names,
d=required_stacks - library_type_names,
))
def reset(self):
"""Reset the interpreter status and PushState."""
self.state = PushState(self.type_library)
self.status = PushInterpreterStatus.normal
self._verbose_trace = self.verbosity_config.program_trace
self._log_fn_for_trace = log_function(self._verbose_trace)
def _log_trace(self, msg=None, log_state=False):
if msg is not None:
self._log_fn_for_trace(msg)
if log_state:
self.state.pretty_print(self._log_fn_for_trace)
def _evaluate_instruction(self, instruction: Union[Instruction, JitInstructionRef]):
self.state = instruction.evaluate(self.state, self.config)
def untyped_to_typed(self):
"""Infers PushType of items on state's untyped queue and pushes to corresponding stacks."""
while len(self.state.untyped) > 0:
el = self.state.untyped.popleft()
push_type = self.type_library.push_type_of(el, error_on_not_found=True)
self.state[push_type.name].push(el)
def evaluate_atom(self, atom: Atom):
"""Evaluate an Atom.
Parameters
----------
atom : Atom
The Atom (Literal, Instruction, JitInstructionRef, or CodeBlock) to
evaluate against the current PushState.
"""
try:
if isinstance(atom, Instruction):
self._evaluate_instruction(atom)
elif isinstance(atom, JitInstructionRef):
self._evaluate_instruction(self.instruction_set[atom.name])
elif isinstance(atom, CodeBlock):
for a in atom[::-1]:
self.state["exec"].push(a)
elif isinstance(atom, Literal):
self.state[atom.push_type.name].push(atom.value)
elif isinstance(atom, Closer):
raise PushError("Closers should not be in push programs. Only genomes.")
else:
raise PushError("Cannont evaluate {t}, require a subclass of Atom".format(t=type(atom)))
self.untyped_to_typed()
except Exception as e:
err_type = type(e).__name__
err_msg = str(e)
raise PushError(
"{t} raised while evaluating {atom}. Origional mesage: \"{m}\"".format(
t=err_type,
atom=atom,
m=err_msg
))
def run(self,
program: CodeBlock,
inputs: Sequence,
output_types: Sequence[str]):
"""Run a Push program given some inputs and desired output PushTypes.
The general flow of this method is:
1. Create a new push state
2. Load the program and inputs.
3. If the exec stack is empty, return the outputs.
4. Else, pop the exec stack and process the atom.
5. Return to step 3.
Parameters
----------
program
Program to run.
inputs
A sequence of values to use as inputs to the push program.
output_types
A secence of values that denote the Pushtypes of the expected
outputs of the push program.
Returns
-------
Sequence
A sequence of values pulled from the final push state. May contain
pyshgp.utils.Token.no_stack_item if needed stacks are empty.
"""
if self.config.reset_on_run:
self.reset()
# Setup
self.state.load_program(program)
self.state.load_inputs(inputs)
stop_time = time.time() + self.config.runtime_limit
steps = 0
if self._verbose_trace >= self.verbosity_config.log_level:
self._log_trace("Initial State:", True)
# Iterate atom evaluation until entire program is evaluated.
while len(self.state["exec"]) > 0:
# Stopping conditions
if steps > self.config.atom_limit:
self.status = PushInterpreterStatus.atom_limit_exceeded
break
if time.time() > stop_time:
self.status = PushInterpreterStatus.runtime_limit_exceeded
break
# Next atom in the program to evaluate.
next_atom = self.state["exec"].pop()
if self._verbose_trace >= self.verbosity_config.log_level:
self._log_trace("Current Atom: " + str(next_atom))
# Evaluate atom.
old_size = len(self.state)
self.evaluate_atom(next_atom)
if len(self.state) > old_size + self.config.growth_cap:
self.status = PushInterpreterStatus.growth_cap_exceeded
break
if self._verbose_trace >= self.verbosity_config.log_level:
self._log_trace("Current State:", True)
steps += 1
if self._verbose_trace >= self.verbosity_config.log_level:
self._log_trace("Finished program evaluation.")
return self.state.observe_stacks(output_types)