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?? Editing: storage.py

"""Plugin storage class."""
import json
import logging
from typing import Any
from typing import Dict

from certbot import configuration
from certbot import errors
from certbot.compat import filesystem
from certbot.compat import os

logger = logging.getLogger(__name__)

class PluginStorage:
    """Class implementing storage functionality for plugins"""

def __init__(self, config: configuration.NamespaceConfig, classkey: str) -> None:
        """Initializes PluginStorage object storing required configuration
        options.

:param .configuration.NamespaceConfig config: Configuration object
        :param str classkey: class name to use as root key in storage file

"""

self._config = config
        self._classkey = classkey
        self._initialized = False
        self._data: Dict
        self._storagepath: str

def _initialize_storage(self) -> None:
        """Initializes PluginStorage data and reads current state from the disk
        if the storage json exists."""

self._storagepath = os.path.join(self._config.config_dir, ".pluginstorage.json")
        self._load()
        self._initialized = True

def _load(self) -> None:
        """Reads PluginStorage content from the disk to a dict structure

:raises .errors.PluginStorageError: when unable to open or read the file
        """
        data: Dict[str, Any] = {}
        filedata = ""
        try:
            with open(self._storagepath, 'r') as fh:
                filedata = fh.read()
        except IOError as e:
            errmsg = "Could not read PluginStorage data file: {0} : {1}".format(
                self._storagepath, str(e))
            if os.path.isfile(self._storagepath):
                # Only error out if file exists, but cannot be read
                logger.error(errmsg)
                raise errors.PluginStorageError(errmsg)
        try:
            data = json.loads(filedata)
        except ValueError:
            if not filedata:
                logger.debug("Plugin storage file %s was empty, no values loaded",
                             self._storagepath)
            else:
                errmsg = "PluginStorage file {0} is corrupted.".format(
                    self._storagepath)
                logger.error(errmsg)
                raise errors.PluginStorageError(errmsg)
        self._data = data

def save(self) -> None:
        """Saves PluginStorage content to disk

:raises .errors.PluginStorageError: when unable to serialize the data
            or write it to the filesystem
        """
        if not self._initialized:
            errmsg = "Unable to save, no values have been added to PluginStorage."
            logger.error(errmsg)
            raise errors.PluginStorageError(errmsg)

try:
            serialized = json.dumps(self._data)
        except TypeError as e:
            errmsg = "Could not serialize PluginStorage data: {0}".format(
                str(e))
            logger.error(errmsg)
            raise errors.PluginStorageError(errmsg)
        try:
            with os.fdopen(filesystem.open(
                    self._storagepath,
                    os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
                    0o600), 'w') as fh:
                fh.write(serialized)
        except IOError as e:
            errmsg = "Could not write PluginStorage data to file {0} : {1}".format(
                self._storagepath, str(e))
            logger.error(errmsg)
            raise errors.PluginStorageError(errmsg)

def put(self, key: str, value: Any) -> None:
        """Put configuration value to PluginStorage

:param str key: Key to store the value to
        :param value: Data to store
        """
        if not self._initialized:
            self._initialize_storage()

if self._classkey not in self._data:
            self._data[self._classkey] = {}
        self._data[self._classkey][key] = value

def fetch(self, key: str) -> Any:
        """Get configuration value from PluginStorage

:param str key: Key to get value from the storage

:raises KeyError: If the key doesn't exist in the storage
        """
        if not self._initialized:
            self._initialize_storage()

return self._data[self._classkey][key]

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usr / lib / python3.6 / site-packages / certbot / plugins /

?? Editing: storage.py

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