old-parkingkoncept/parkingkonceptvenv/lib/python3.7/site-packages/docutils/__pycache__/statemachine.cpython-37.pyc

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A finite state machine specialized for regular-expression-based text filters,
this module defines the following classes:

- `StateMachine`, a state machine
- `State`, a state superclass
- `StateMachineWS`, a whitespace-sensitive version of `StateMachine`
- `StateWS`, a state superclass for use with `StateMachineWS`
- `SearchStateMachine`, uses `re.search()` instead of `re.match()`
- `SearchStateMachineWS`, uses `re.search()` instead of `re.match()`
- `ViewList`, extends standard Python lists.
- `StringList`, string-specific ViewList.

Exception classes:

- `StateMachineError`
- `UnknownStateError`
- `DuplicateStateError`
- `UnknownTransitionError`
- `DuplicateTransitionError`
- `TransitionPatternNotFound`
- `TransitionMethodNotFound`
- `UnexpectedIndentationError`
- `TransitionCorrection`: Raised to switch to another transition.
- `StateCorrection`: Raised to switch to another state & transition.

Functions:

- `string2lines()`: split a multi-line string into a list of one-line strings


How To Use This Module
======================
(See the individual classes, methods, and attributes for details.)

1. Import it: ``import statemachine`` or ``from statemachine import ...``.
   You will also need to ``import re``.

2. Derive a subclass of `State` (or `StateWS`) for each state in your state
   machine::

       class MyState(statemachine.State):

   Within the state's class definition:

   a) Include a pattern for each transition, in `State.patterns`::

          patterns = {'atransition': r'pattern', ...}

   b) Include a list of initial transitions to be set up automatically, in
      `State.initial_transitions`::

          initial_transitions = ['atransition', ...]

   c) Define a method for each transition, with the same name as the
      transition pattern::

          def atransition(self, match, context, next_state):
              # do something
              result = [...]  # a list
              return context, next_state, result
              # context, next_state may be altered

      Transition methods may raise an `EOFError` to cut processing short.

   d) You may wish to override the `State.bof()` and/or `State.eof()` implicit
      transition methods, which handle the beginning- and end-of-file.

   e) In order to handle nested processing, you may wish to override the
      attributes `State.nested_sm` and/or `State.nested_sm_kwargs`.

      If you are using `StateWS` as a base class, in order to handle nested
      indented blocks, you may wish to:

      - override the attributes `StateWS.indent_sm`,
        `StateWS.indent_sm_kwargs`, `StateWS.known_indent_sm`, and/or
        `StateWS.known_indent_sm_kwargs`;
      - override the `StateWS.blank()` method; and/or
      - override or extend the `StateWS.indent()`, `StateWS.known_indent()`,
        and/or `StateWS.firstknown_indent()` methods.

3. Create a state machine object::

       sm = StateMachine(state_classes=[MyState, ...],
                         initial_state='MyState')

4. Obtain the input text, which needs to be converted into a tab-free list of
   one-line strings. For example, to read text from a file called
   'inputfile'::

       input_string = open('inputfile').read()
       input_lines = statemachine.string2lines(input_string)

5. Run the state machine on the input text and collect the results, a list::

       results = sm.run(input_lines)

6. Remove any lingering circular references::

       sm.unlink()
Zrestructuredtext<78>N)
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    A finite state machine for text filters using regular expressions.

    The input is provided in the form of a list of one-line strings (no
    newlines). States are subclasses of the `State` class. Transitions consist
    of regular expression patterns and transition methods, and are defined in
    each state.

    The state machine is started with the `run()` method, which returns the
    results of processing in a list.
    FcCsLd
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        Initialize a `StateMachine` object; add state objects.

        Parameters:

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        - `initial_state`: a string, the class name of the initial state.
        - `debug`: a boolean; produce verbose output if true (nonzero).
        Nr
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        Accumulate the results returned by the transition methods in a list.
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        Parameters:

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        Return the values returned by the transition method:

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