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DBM-style interface to a directory.
Each key is stored as a single file. This is not expected to be very fast or
efficient, but it's good for easy debugging.
DirDBMs are *not* thread-safe, they should only be accessed by one thread at
a time.
No files should be placed in the working directory of a DirDBM save those
created by the DirDBM itself!
Maintainer: Itamar Shtull-Trauring
iÿÿÿÿNt DirDBMc B sÎ e Z d Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z
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„ Z d „ Z d d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z RS( s A directory with a DBM interface.
This class presents a hash-like interface to a directory of small,
flat files. It can only use strings as keys or values.
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@type name: str
@param name: Base path to use for the directory storage.
s *.news *.rpliüÿÿÿN( t ost patht abspatht dnamet isdirt mkdirt globt joint removet existst rename( t selft namet ft replacementst old( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt __init__/ s
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c C s% t j | ƒ j d d ƒ j d d ƒ S( s6 Encode a key so it can be used as a filename.
s
t _t /t -( t base64t encodestringt replace( R t k( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt _encodeJ s c C s% t j | j d d ƒ j d d ƒ ƒ S( s* Decode a filename to get the key.
R s
R R ( R t decodestringR ( R R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt _decodeP s c C s) t | d ƒ } | j ƒ } | j ƒ | S( s€ Read in the contents of a file.
Override in subclasses to e.g. provide transparently encrypted dirdbm.
t rb( t _opent readt close( R R R t s( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt _readFileU s
c C s4 t | d ƒ } | j | ƒ | j ƒ | j ƒ d S( sv Write data to a file.
Override in subclasses to e.g. provide transparently encrypted dirdbm.
t wbN( R t writet flushR ( R R t dataR ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt
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@return: The number of key/value pairs in this Shelf
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C{dirdbm[k] = v}
Create or modify a textfile in this directory
@type k: str
@param k: key to set
@type v: str
@param v: value to associate with C{k}
s DirDBM key must be a strings DirDBM value must be a strings .rpls .newN(
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StringTypet AssertionErrorR R R R R R
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C{dirdbm[k]}
Get the contents of a file in this directory as a string.
@type k: str
@param k: key to lookup
@return: The value associated with C{k}
@raise KeyError: Raised when there is no such key
s DirDBM key must be a stringN( R* R+ R, R- R R R R R R! t KeyError( R R R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt __getitem__Ž s !!c C s† t | ƒ t j k s! t d ƒ ‚ | j | ƒ } y# t j t j j | j | ƒ ƒ Wn, t
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C{del dirdbm[foo]}
Delete a file in this directory.
@type k: str
@param k: key to delete
@raise KeyError: Raised when there is no such key
s DirDBM key must be a stringN( R* R+ R, R- R R R R R R t OSErrort IOErrorR1 R ( R R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt __delitem__ s
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@return: a C{list} of filenames (keys).
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@return: a C{list} of file-contents (values).
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@return: a C{list} of 2-tuples containing key/value pairs.
( R7 R8 ( R t itemsR7 R: ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyR< ¿ s
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@type key: str
@param key: The key to test
@return: A true value if this dirdbm has the specified key, a faluse
value otherwise.
s DirDBM key must be a string(
R* R+ R, R- R R R t isfileR R ( R R: ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt has_keyÉ s !c C s% | j | ƒ s | | | <| S| | S( s¼
@type key: str
@param key: The key to lookup
@param value: The value to associate with key if key is not already
associated with a value.
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setdefaultÕ s
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@type key: str
@param key: The key to lookup
@param default: The value to return if the given key does not exist
@return: The value associated with C{key} or C{default} if not
C{self.has_key(key)}
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C{key in dirdbm}
@type key: str
@param key: The key to test
@return: A true value if C{self.has_key(key)}, a false value otherwise.
s DirDBM key must be a string(
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Wd S( sþ
Add all the key/value pairs in C{dict} to this dirdbm. Any conflicting
keys will be overwritten with the values from C{dict}.
@type dict: mapping
@param dict: A mapping of key/value pairs to add to this dirdbm.
N( R< ( R t dictR: t val( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt updateþ s c C si t j j | ƒ } | | j k s' t ‚ | j | ƒ } | j ƒ x" | j ƒ D] } | | | | <qM W| S( sL
Copy the contents of this dirdbm to the dirdbm at C{path}.
@type path: C{str}
@param path: The path of the dirdbm to copy to. If a dirdbm
exists at the destination path, it is cleared first.
@rtype: C{DirDBM}
@return: The dirdbm this dirdbm was copied to.
( R R R R R- t __class__t clearR7 ( R R t dR ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt copyTo s
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Wd S( s<
Delete all key/value pairs in this dirdbm.
N( R7 ( R R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyRH s c C s d S( sL
Close this dbm: no-op, for dbm-style interface compliance.
N( ( R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyR $ s c C sq t | ƒ t j k s! t d ƒ ‚ t j j | j | j | ƒ ƒ } t j j | ƒ rd t j j
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Returns modification time of an entry.
@return: Last modification date (seconds since epoch) of entry C{key}
@raise KeyError: Raised when there is no such key
s DirDBM key must be a stringN( R* R+ R, R- R R R R R R= t getmtimeR1 ( R R: R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyt getModificationTime) s
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t Shelfc B s e Z d Z d „ Z d „ Z RS( s A directory with a DBM shelf interface.
This class presents a hash-like interface to a directory of small,
flat files. Keys must be strings, but values can be any given object.
c C s& t j | ƒ } t j | | | ƒ d S( sÉ
C{shelf[foo] = bar}
Create or modify a textfile in this directory.
@type k: str
@param k: The key to set
@param v: The value to associate with C{key}
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C{dirdbm[foo]}
Get and unpickle the contents of a file in this directory.
@type k: str
@param k: The key to lookup
@return: The value associated with the given key
@raise KeyError: Raised if the given key does not exist
( RR t loadsR R2 ( R R ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyR2 L s ( RM RN RO R0 R2 ( ( ( s< /usr/lib/python2.7/dist-packages/twisted/persisted/dirdbm.pyRQ 8 s
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This is for 'anydbm' compatibility.
@param file: The parameter to pass to the DirDBM constructor.
@param flag: ignored
@param mode: ignored
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