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o ��I^:> � @ sb d dl Z d dlmZ d dlmZ zd dlmZ W n ey' d dlm Z Y nw d dl Z d dl Z ddl m Z mZ ddlmZ e �d g d ��Zd d � Zd d� Zdd� Ze jdd�G dd� de��Zdd� Zdd� Zdd� Zdd � Z d d � Z e jd d d �G d!d"� d"e��Z e jdd�G d#d$� d$e��Z e jd d d �G d%d&� d&e��Z e� Z!d'd(� Z"G d)d*� d*e�Z#dS )+� N��wraps)�count)�getfullargspec)� getargspec� )� Transitioner� Automaton)� preserveName�ArgSpec��args�varargs�varkw�defaults� kwonlyargs�kwonlydefaults� annotationsc C s� t | �}tt|j�|jtjr|jn|j|j r|j ndtjr"t|j �ndtjr2|j r0t|j � � �ndndtjr?t|j � � �d�S dd�S )z� Normalize inspect.ArgSpec across python versions and convert mutable attributes to immutable types. :param Callable func: A function. :return: The function's ArgSpec. :rtype: ArgSpec � r )� getArgsSpecr �tupler r �six�PY3r �keywordsr r r �itemsr )�func�specr r �5/usr/lib/python3/dist-packages/automat/_methodical.py� _getArgSpec s" ��� �r c C s2 t | j| j | jr dnd | jrdnd | j �S )a0 Get the name of all arguments defined in a function signature. The name of * and ** arguments is normalized to "*args" and "**kwargs". :param ArgSpec spec: A function to interrogate for a signature. :return: The set of all argument names in `func`s signature. :rtype: Set[str] )z*argsr )z**kwargs)�setr r r r r )r r r r � _getArgNames2 s � � ���r c s t � �� fdd��}|S )a Decorate a function so all its arguments must be passed by keyword. A useful utility for decorators that take arguments so that they don't accidentally get passed the thing they're decorating as their first argument. Only works for methods right now. c s � | fi |��S �Nr )�self�kw��fr r �gO s z_keywords_only.<locals>.gr )r% r& r r$ r �_keywords_onlyE s r' T)�frozenc @ sD e Zd ZdZejdd�Ze�� Zejdd�Ze fdd�Z dd� Z dS ) �MethodicalStatez- A state for a L{MethodicalMachine}. F��reprc C sj t |j�}|D ]!}t |j�}|�|�s(tdj|jj|jjt|j�t|j�d���q| j� | ||||� dS )ac Declare a state transition within the :class:`automat.MethodicalMachine` associated with this :class:`automat.MethodicalState`: upon the receipt of the `input`, enter the `state`, emitting each output in `outputs`. :param MethodicalInput input: The input triggering a state transition. :param MethodicalState enter: The resulting state. :param Iterable[MethodicalOutput] outputs: The outputs to be triggered as a result of the declared state transition. :param Callable collector: The function to be used when collecting output return values. :raises TypeError: if any of the `outputs` signatures do not match the `inputs` signature. :raises ValueError: if the state transition from `self` via `input` has already been defined. zdmethod {input} signature {inputSignature} does not match output {output} signature {outputSignature})�input�output�inputSignature�outputSignatureN) r �argSpec�issubset� TypeError�format�method�__name__r �machine�_oneTransition)r" r, �enter�outputs� collector� inputArgsr- � outputArgsr r r �upon^ s ��� zMethodicalState.uponc C � | j jS r! �r4 r5 �r" r r r �_name� � zMethodicalState._nameN) r5 � __module__� __qualname__�__doc__�attr�ibr6 r4 � serialized�listr= rA r r r r r) U s "r) c C s0 t | |d�}|du rt||j�}t| ||� |S )z Get a L{Transitioner} N)�getattrr � initialState�setattr)�oself�symbol� automaton� transitionerr r r �_transitionerFromInstance� s � rQ c C s d S r! r r r r r �_empty� s rR c C s dS )� docstringNr r r r r � _docstring� s rT c C s$ |j jtj jtj jfvrtd��d S )Nzfunction body must be empty)�__code__�co_coderR rT � ValueError)�inst� attributer% r r r � assertNoCode� s ��rZ c s� t t|jdd� | ��}�jr| }n �fdd�|D �}t |��|D ] \}}�||f7 �q!t|jddd� |jddd� �}�fdd�|D �} | �|� �jrT| } || fS �jdd� �j � � fdd�| �� D �} || fS ) a� Filter out arguments that were passed to input that output won't accept. :param tuple args: The *args that input received. :param dict kwargs: The **kwargs that input received. :param ArgSpec inputSpec: The input's arg spec. :param ArgSpec outputSpec: The output's arg spec. :return: The args and kwargs that output will accept. :rtype: Tuple[tuple, dict] r Nc s g | ] \}}|� j v r|�qS r )r ��.0�n�v)� outputSpecr r � <listcomp>� � z _filterArgs.<locals>.<listcomp>���c s i | ] \}}|� vr||�qS r r r[ )�passed_arg_namesr r � <dictcomp>� ra z _filterArgs.<locals>.<dictcomp>c s i | ] \}}|� v r||�qS r r r[ )�all_accepted_namesr r rd � s �) r �zipr r r �updater r r ) r �kwargs� inputSpecr_ � named_args� return_args�name�valuer � full_kwargs� return_kwargsr )re r_ rc r � _filterArgs� s " �rp F)�eq�hashc @ sv e Zd ZdZejdd�Zejed�Zejdd�Z eje� e �dd�Z ejddd�Z e jdd� �Zdd d �Zd d � Zd S )�MethodicalInputz. An input for a L{MethodicalMachine}. Fr* )� validator)�defaultr+ ��initr+ c C � t | j�S r! �r r4 r@ r r r � _buildArgSpec� � z MethodicalInput._buildArgSpecNc s8 t � �j�j��t�j�t�j�� ��fdd���}|S )z� Return a function that takes no arguments and returns values returned by output functions produced by the given L{MethodicalInput} in C{oself}'s current state. c s� �j � g| �R i |�� �j}����\}}�j| }g }|D ]%}|r)||�� � t| |�j|j�\}} |� g|�R i | ��} |�| � q ||�S r! )r4 �_state� transition� collectorsrA rp r0 �append) r rh � previousStater9 � outTracerr: �valuesr- �a�krm �rM r" rP r r �doInput� s z(MethodicalInput.__get__.<locals>.doInput)rQ rN rO r r4 r )r" rM �typer� r r� r �__get__� s � zMethodicalInput.__get__c C r> r! r? r@ r r r rA � rB zMethodicalInput._namer! )r5 rC rD rE rF rG rO rZ r4 rN �Factory�dictr~ r0 ru rz r� rA r r r r rs � s rs c @ sZ e Zd ZdZejdd�Ze�� Zejddd�Zej dd� �Z ddd �Z d d � Z d d � Z dS )�MethodicalOutputz/ An output for a L{MethodicalMachine}. Fr* rv c C rx r! ry r@ r r r rz r{ z MethodicalOutput._buildArgSpecNc C s t dj|j| jjd���)zX Outputs are private, so raise an exception when we attempt to get one. zf{cls}.{method} is a state-machine output method; to produce this output, call an input method instead.)�clsr4 )�AttributeErrorr3 r5 r4 �r" rM r� r r r r� s ��zMethodicalOutput.__get__c O s | j |g|�R i |��S )z- Call the underlying method. )r4 )r" rM r rh r r r �__call__ s zMethodicalOutput.__call__c C r> r! r? r@ r r r rA rB zMethodicalOutput._namer! )r5 rC rD rE rF rG r6 r4 r0 ru rz r� r� rA r r r r r� � s r� c @ s. e Zd Zejdd�Zejdd�Zddd�ZdS )�MethodicalTracerFr* Nc s t || j| j�� � fdd�}|S )Nc s � � | � d S r! )�setTrace)�tracer�rP r r r� ) s z*MethodicalTracer.__get__.<locals>.setTrace)rQ rN rO )r" rM r� r� r r� r r� & s � zMethodicalTracer.__get__r! )r5 rC rD rF rG rO rN r� r r r r r� s r� c C s dt tt�� S )z, Create a unique Python identifier. �_symbol_)�str�next�counterr r r r �gensym0 s r� c @ s� e Zd ZdZdd� Zddd�Ze ddd ��Zed d � �Zed d � �Z dd� Z edd� �Z edd� �Z e dd� �Zdd� ZdS )�MethodicalMachinezj A :class:`MethodicalMachine` is an interface to an `Automaton` that uses methods on a class. c C s t � | _i | _t� | _d S r! )r � _automaton� _reducersr� �_symbolr@ r r r �__init__> s zMethodicalMachine.__init__Nc C s |durt d��| S )z� L{MethodicalMachine} is an implementation detail for setting up class-level state; applications should never need to access it on an instance. Nz.MethodicalMachine is an implementation detail.)r� r� r r r r� D s �zMethodicalMachine.__get__Fc s � ��fdd�}|S )a Declare a state, possibly an initial state or a terminal state. This is a decorator for methods, but it will modify the method so as not to be callable any more. :param bool initial: is this state the initial state? Only one state on this :class:`automat.MethodicalMachine` may be an initial state; more than one is an error. :param bool terminal: Is this state a terminal state? i.e. a state that the machine can end up in? (This is purely informational at this point.) :param Hashable serialized: a serializable value to be used to represent this state to external systems. This value should be hashable; :py:func:`unicode` is a good type to use. c s t �| �d�}� r |�j_|S )N)r6 r4 rH )r) r� rK )� stateMethod�state��initialr" rH r r � decoratorf s �z*MethodicalMachine.state.<locals>.decoratorr )r" r� �terminalrH r� r r� r r� P s zMethodicalMachine.statec � � fdd�}|S )zM Declare an input. This is a decorator for methods. c s t � j| � jd�S )N)rO r4 rN )rs r� r� )� inputMethodr@ r r r� w s �z*MethodicalMachine.input.<locals>.decoratorr �r" r� r r@ r r, p s zMethodicalMachine.inputc r� )z� Declare an output. This is a decorator for methods. This method will be called when the state machine transitions to this state as specified in the decorated `output` method. c s t � | d�S )N)r6 r4 )r� )� outputMethodr@ r r r� � s z+MethodicalMachine.output.<locals>.decoratorr r� r r@ r r- ~ s zMethodicalMachine.outputc C s$ | j �|||t|�� ||j|< dS )z. See L{MethodicalState.upon}. N)r� � addTransitionr r~ )r" � startState� inputToken�endState� outputTokensr: r r r r7 � s �z MethodicalMachine._oneTransitionc r� )� c � t � �� �fdd��}|S )Nc s t | �j�j�}� | |jj�S r! )rQ r� r� r| rH )rM rP �� decorateer" r r � serialize� s �zBMethodicalMachine.serializer.<locals>.decorator.<locals>.serializer )r� r� r@ �r� r r� � s z/MethodicalMachine.serializer.<locals>.decoratorr r� r r@ r � serializer� s z MethodicalMachine.serializerc r� )r� c r� )Nc sR � | g|�R i |��}i }�j �� D ]}|||j< qt| �j�j �}|| |_d S r! )r� �statesrH rQ r� r| )rM r rh r� �mapping� eachStaterP r� r r � unserialize� s � zFMethodicalMachine.unserializer.<locals>.decorator.<locals>.unserializer )r� r� r@ r� r r� � s z1MethodicalMachine.unserializer.<locals>.decoratorr r� r r@ r � unserializer� s z MethodicalMachine.unserializerc C s t | j| j�S r! )r� r� r� r@ r r r � _setTrace� s zMethodicalMachine._setTracec C s* ddl m} || jdd� dd� dd� d�S )a Generate a L{graphviz.Digraph} that represents this machine's states and transitions. @return: L{graphviz.Digraph} object; for more information, please see the documentation for U{graphviz<https://graphviz.readthedocs.io/>} r )� makeDigraphc S r> r! r? )r� r r r �<lambda>� � z-MethodicalMachine.asDigraph.<locals>.<lambda>c S r> r! r? )r, r r r r� � r� c S r> r! r? )r- r r r r� � r� )� stateAsString� inputAsString�outputAsString)� _visualizer� r� )r" r� r r r � asDigraph� s �zMethodicalMachine.asDigraphr! )FFN)r5 rC rD rE r� r� r' r� r, r- r7 r� r� �propertyr� r� r r r r r� 8 s( � r� )$� collections� functoolsr � itertoolsr �inspectr r � ImportErrorr rF r �_corer r �_introspectionr � namedtupler r r r' �s�objectr) rQ rR rT rZ rp rs r� r� r� r� r� r r r r �<module> s@ � . 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