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Doc/library/bsddb.rst deleted 100644 → 0
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:mod:`bsddb` --- Interface to Berkeley DB library
=================================================
.. module:: bsddb
:synopsis: Interface to Berkeley DB database library
.. sectionauthor:: Skip Montanaro <skip@pobox.com>
The :mod:`bsddb` module provides an interface to the Berkeley DB library. Users
can create hash, btree or record based library files using the appropriate open
call. Bsddb objects behave generally like dictionaries. Keys and values must be
strings, however, so to use other objects as keys or to store other kinds of
objects the user must serialize them somehow, typically using
:func:`marshal.dumps` or :func:`pickle.dumps`.
The :mod:`bsddb` module requires a Berkeley DB library version from 3.3 thru
4.5.
.. seealso::
http://pybsddb.sourceforge.net/
The website with documentation for the :mod:`bsddb.db` Python Berkeley DB
interface that closely mirrors the object oriented interface provided in
Berkeley DB 3 and 4.
http://www.oracle.com/database/berkeley-db/
The Berkeley DB library.
A more modern DB, DBEnv and DBSequence object interface is available in the
:mod:`bsddb.db` module which closely matches the Berkeley DB C API documented at
the above URLs. Additional features provided by the :mod:`bsddb.db` API include
fine tuning, transactions, logging, and multiprocess concurrent database access.
The following is a description of the legacy :mod:`bsddb` interface compatible
with the old Python bsddb module. Starting in Python 2.5 this interface should
be safe for multithreaded access. The :mod:`bsddb.db` API is recommended for
threading users as it provides better control.
The :mod:`bsddb` module defines the following functions that create objects that
access the appropriate type of Berkeley DB file. The first two arguments of
each function are the same. For ease of portability, only the first two
arguments should be used in most instances.
.. function:: hashopen(filename[, flag[, mode[, pgsize[, ffactor[, nelem[, cachesize[, lorder[, hflags]]]]]]]])
Open the hash format file named *filename*. Files never intended to be
preserved on disk may be created by passing ``None`` as the *filename*. The
optional *flag* identifies the mode used to open the file. It may be ``'r'``
(read only), ``'w'`` (read-write) , ``'c'`` (read-write - create if necessary;
the default) or ``'n'`` (read-write - truncate to zero length). The other
arguments are rarely used and are just passed to the low-level :cfunc:`dbopen`
function. Consult the Berkeley DB documentation for their use and
interpretation.
.. function:: btopen(filename[, flag[, mode[, btflags[, cachesize[, maxkeypage[, minkeypage[, pgsize[, lorder]]]]]]]])
Open the btree format file named *filename*. Files never intended to be
preserved on disk may be created by passing ``None`` as the *filename*. The
optional *flag* identifies the mode used to open the file. It may be ``'r'``
(read only), ``'w'`` (read-write), ``'c'`` (read-write - create if necessary;
the default) or ``'n'`` (read-write - truncate to zero length). The other
arguments are rarely used and are just passed to the low-level dbopen function.
Consult the Berkeley DB documentation for their use and interpretation.
.. function:: rnopen(filename[, flag[, mode[, rnflags[, cachesize[, pgsize[, lorder[, rlen[, delim[, source[, pad]]]]]]]]]])
Open a DB record format file named *filename*. Files never intended to be
preserved on disk may be created by passing ``None`` as the *filename*. The
optional *flag* identifies the mode used to open the file. It may be ``'r'``
(read only), ``'w'`` (read-write), ``'c'`` (read-write - create if necessary;
the default) or ``'n'`` (read-write - truncate to zero length). The other
arguments are rarely used and are just passed to the low-level dbopen function.
Consult the Berkeley DB documentation for their use and interpretation.
.. class:: StringKeys(db)
Wrapper class around a DB object that supports string keys (rather than bytes).
All keys are encoded as UTF-8, then passed to the underlying object.
.. class:: StringValues(db)
Wrapper class around a DB object that supports string values (rather than bytes).
All values are encoded as UTF-8, then passed to the underlying object.
.. seealso::
Module :mod:`dbm.bsd`
DBM-style interface to the :mod:`bsddb`
.. _bsddb-objects:
Hash, BTree and Record Objects
------------------------------
Once instantiated, hash, btree and record objects support the same methods as
dictionaries. In addition, they support the methods listed below.
.. describe:: key in bsddbobject
Return ``True`` if the DB file contains the argument as a key.
.. method:: bsddbobject.close()
Close the underlying file. The object can no longer be accessed. Since there
is no open :meth:`open` method for these objects, to open the file again a new
:mod:`bsddb` module open function must be called.
.. method:: bsddbobject.keys()
Return the list of keys contained in the DB file. The order of the list is
unspecified and should not be relied on. In particular, the order of the list
returned is different for different file formats.
.. method:: bsddbobject.set_location(key)
Set the cursor to the item indicated by *key* and return a tuple containing the
key and its value. For binary tree databases (opened using :func:`btopen`), if
*key* does not actually exist in the database, the cursor will point to the next
item in sorted order and return that key and value. For other databases,
:exc:`KeyError` will be raised if *key* is not found in the database.
.. method:: bsddbobject.first()
Set the cursor to the first item in the DB file and return it. The order of
keys in the file is unspecified, except in the case of B-Tree databases. This
method raises :exc:`bsddb.error` if the database is empty.
.. method:: bsddbobject.next()
Set the cursor to the next item in the DB file and return it. The order of
keys in the file is unspecified, except in the case of B-Tree databases.
.. method:: bsddbobject.previous()
Set the cursor to the previous item in the DB file and return it. The order of
keys in the file is unspecified, except in the case of B-Tree databases. This
is not supported on hashtable databases (those opened with :func:`hashopen`).
.. method:: bsddbobject.last()
Set the cursor to the last item in the DB file and return it. The order of keys
in the file is unspecified. This is not supported on hashtable databases (those
opened with :func:`hashopen`). This method raises :exc:`bsddb.error` if the
database is empty.
.. method:: bsddbobject.sync()
Synchronize the database on disk.
Example::
>>> import bsddb
>>> db = bsddb.btopen('/tmp/spam.db', 'c')
>>> for i in range(10):
... db[str(i)] = '%d' % (i*i)
...
>>> db['3']
'9'
>>> db.keys()
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
>>> db.first()
('0', '0')
>>> db.next()
('1', '1')
>>> db.last()
('9', '81')
>>> db.set_location('2')
('2', '4')
>>> db.previous()
('1', '1')
>>> for k, v in db.iteritems():
... print(k, v)
0 0
1 1
2 4
3 9
4 16
5 25
6 36
7 49
8 64
9 81
>>> '8' in db
True
>>> db.sync()
0
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Lib/bsddb/db.py deleted 100644 → 0
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#----------------------------------------------------------------------
# Copyright (c) 1999-2001, Digital Creations, Fredericksburg, VA, USA
# and Andrew Kuchling. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# o Redistributions of source code must retain the above copyright
# notice, this list of conditions, and the disclaimer that follows.
#
# o Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# o Neither the name of Digital Creations nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS AND CONTRIBUTORS *AS
# IS* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL
# CREATIONS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
# DAMAGE.
#----------------------------------------------------------------------
# This module is just a placeholder for possible future expansion, in
# case we ever want to augment the stuff in _db in any way. For now
# it just simply imports everything from _db.
import sys
absolute_import = (sys.version_info[0] >= 3)
if not absolute_import :
if __name__.startswith('bsddb3.') :
# import _pybsddb binary as it should be the more recent version from
# a standalone pybsddb addon package than the version included with
# python as bsddb._bsddb.
from _pybsddb import *
from _pybsddb import __version__
else:
from _bsddb import *
from _bsddb import __version__
else :
# Because this syntaxis is not valid before Python 2.5
if __name__.startswith('bsddb3.') :
exec("from ._pybsddb import *")
exec("from ._pybsddb import __version__")
else :
exec("from ._bsddb import *")
exec("from ._bsddb import __version__")
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Lib/bsddb/dbrecio.py deleted 100644 → 0
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"""
File-like objects that read from or write to a bsddb record.
This implements (nearly) all stdio methods.
f = DBRecIO(db, key, txn=None)
f.close() # explicitly release resources held
flag = f.isatty() # always false
pos = f.tell() # get current position
f.seek(pos) # set current position
f.seek(pos, mode) # mode 0: absolute; 1: relative; 2: relative to EOF
buf = f.read() # read until EOF
buf = f.read(n) # read up to n bytes
f.truncate([size]) # truncate file at to at most size (default: current pos)
f.write(buf) # write at current position
f.writelines(list) # for line in list: f.write(line)
Notes:
- fileno() is left unimplemented so that code which uses it triggers
an exception early.
- There's a simple test set (see end of this file) - not yet updated
for DBRecIO.
- readline() is not implemented yet.
From:
Itamar Shtull-Trauring <itamar@maxnm.com>
"""
import errno
import string
class DBRecIO:
def __init__(self, db, key, txn=None):
self.db = db
self.key = key
self.txn = txn
self.len = None
self.pos = 0
self.closed = 0
self.softspace = 0
def close(self):
if not self.closed:
self.closed = 1
del self.db, self.txn
def isatty(self):
if self.closed:
raise ValueError("I/O operation on closed file")
return 0
def seek(self, pos, mode = 0):
if self.closed:
raise ValueError("I/O operation on closed file")
if mode == 1:
pos = pos + self.pos
elif mode == 2:
pos = pos + self.len
self.pos = max(0, pos)
def tell(self):
if self.closed:
raise ValueError("I/O operation on closed file")
return self.pos
def read(self, n = -1):
if self.closed:
raise ValueError("I/O operation on closed file")
if n < 0:
newpos = self.len
else:
newpos = min(self.pos+n, self.len)
dlen = newpos - self.pos
r = self.db.get(self.key, txn=self.txn, dlen=dlen, doff=self.pos)
self.pos = newpos
return r
__fixme = """
def readline(self, length=None):
if self.closed:
raise ValueError, "I/O operation on closed file"
if self.buflist:
self.buf = self.buf + string.joinfields(self.buflist, '')
self.buflist = []
i = string.find(self.buf, '\n', self.pos)
if i < 0:
newpos = self.len
else:
newpos = i+1
if length is not None:
if self.pos + length < newpos:
newpos = self.pos + length
r = self.buf[self.pos:newpos]
self.pos = newpos
return r
def readlines(self, sizehint = 0):
total = 0
lines = []
line = self.readline()
while line:
lines.append(line)
total += len(line)
if 0 < sizehint <= total:
break
line = self.readline()
return lines
"""
def truncate(self, size=None):
if self.closed:
raise ValueError("I/O operation on closed file")
if size is None:
size = self.pos
elif size < 0:
raise IOError(errno.EINVAL,
"Negative size not allowed")
elif size < self.pos:
self.pos = size
self.db.put(self.key, "", txn=self.txn, dlen=self.len-size, doff=size)
def write(self, s):
if self.closed:
raise ValueError("I/O operation on closed file")
if not s: return
if self.pos > self.len:
self.buflist.append('\0'*(self.pos - self.len))
self.len = self.pos
newpos = self.pos + len(s)
self.db.put(self.key, s, txn=self.txn, dlen=len(s), doff=self.pos)
self.pos = newpos
def writelines(self, list):
self.write(string.joinfields(list, ''))
def flush(self):
if self.closed:
raise ValueError("I/O operation on closed file")
"""
# A little test suite
def _test():
import sys
if sys.argv[1:]:
file = sys.argv[1]
else:
file = '/etc/passwd'
lines = open(file, 'r').readlines()
text = open(file, 'r').read()
f = StringIO()
for line in lines[:-2]:
f.write(line)
f.writelines(lines[-2:])
if f.getvalue() != text:
raise RuntimeError, 'write failed'
length = f.tell()
print 'File length =', length
f.seek(len(lines[0]))
f.write(lines[1])
f.seek(0)
print 'First line =', repr(f.readline())
here = f.tell()
line = f.readline()
print 'Second line =', repr(line)
f.seek(-len(line), 1)
line2 = f.read(len(line))
if line != line2:
raise RuntimeError, 'bad result after seek back'
f.seek(len(line2), 1)
list = f.readlines()
line = list[-1]
f.seek(f.tell() - len(line))
line2 = f.read()
if line != line2:
raise RuntimeError, 'bad result after seek back from EOF'
print 'Read', len(list), 'more lines'
print 'File length =', f.tell()
if f.tell() != length:
raise RuntimeError, 'bad length'
f.close()
if __name__ == '__main__':
_test()
"""
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#------------------------------------------------------------------------
#
# Copyright (C) 2000 Autonomous Zone Industries
#
# License: This is free software. You may use this software for any
# purpose including modification/redistribution, so long as
# this header remains intact and that you do not claim any
# rights of ownership or authorship of this software. This
# software has been tested, but no warranty is expressed or
# implied.
#
# Author: Gregory P. Smith <greg@krypto.org>
#
# Note: I don't know how useful this is in reality since when a
# DBLockDeadlockError happens the current transaction is supposed to be
# aborted. If it doesn't then when the operation is attempted again
# the deadlock is still happening...
# --Robin
#
#------------------------------------------------------------------------
#
# import the time.sleep function in a namespace safe way to allow
# "from bsddb.dbutils import *"
#
from time import sleep as _sleep
import sys
absolute_import = (sys.version_info[0] >= 3)
if absolute_import :
# Because this syntaxis is not valid before Python 2.5
exec("from . import db")
else :
from . import db
# always sleep at least N seconds between retrys
_deadlock_MinSleepTime = 1.0/128
# never sleep more than N seconds between retrys
_deadlock_MaxSleepTime = 3.14159
# Assign a file object to this for a "sleeping" message to be written to it
# each retry
_deadlock_VerboseFile = None
def DeadlockWrap(function, *_args, **_kwargs):
"""DeadlockWrap(function, *_args, **_kwargs) - automatically retries
function in case of a database deadlock.
This is a function intended to be used to wrap database calls such
that they perform retrys with exponentially backing off sleeps in
between when a DBLockDeadlockError exception is raised.
A 'max_retries' parameter may optionally be passed to prevent it
from retrying forever (in which case the exception will be reraised).
d = DB(...)
d.open(...)
DeadlockWrap(d.put, "foo", data="bar") # set key "foo" to "bar"
"""
sleeptime = _deadlock_MinSleepTime
max_retries = _kwargs.get('max_retries', -1)
if 'max_retries' in _kwargs:
del _kwargs['max_retries']
while True:
try:
return function(*_args, **_kwargs)
except db.DBLockDeadlockError:
if _deadlock_VerboseFile:
_deadlock_VerboseFile.write(
'dbutils.DeadlockWrap: sleeping %1.3f\n' % sleeptime)
_sleep(sleeptime)
# exponential backoff in the sleep time
sleeptime *= 2
if sleeptime > _deadlock_MaxSleepTime:
sleeptime = _deadlock_MaxSleepTime
max_retries -= 1
if max_retries == -1:
raise
#------------------------------------------------------------------------
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"""
TestCases for python DB Btree key comparison function.
"""
import sys, os, re
from . import test_all
from io import StringIO
import unittest
from .test_all import db, dbshelve, test_support, \
get_new_environment_path, get_new_database_path
lexical_cmp = cmp
def lowercase_cmp(left, right):
return cmp (left.lower(), right.lower())
def make_reverse_comparator (cmp):
def reverse (left, right, delegate=cmp):
return - delegate (left, right)
return reverse
_expected_lexical_test_data = ['', 'CCCP', 'a', 'aaa', 'b', 'c', 'cccce', 'ccccf']
_expected_lowercase_test_data = ['', 'a', 'aaa', 'b', 'c', 'CC', 'cccce', 'ccccf', 'CCCP']
class ComparatorTests (unittest.TestCase):
def comparator_test_helper (self, comparator, expected_data):
data = expected_data[:]
import sys
if sys.version_info[0] < 3 :
if sys.version_info[:3] < (2, 4, 0):
data.sort(comparator)
else :
data.sort(cmp=comparator)
else : # Insertion Sort. Please, improve
data2 = []
for i in data :
for j, k in enumerate(data2) :
r = comparator(k, i)
if r == 1 :
data2.insert(j, i)
break
else :
data2.append(i)
data = data2
self.failUnless (data == expected_data,
"comparator `%s' is not right: %s vs. %s"
% (comparator, expected_data, data))
def test_lexical_comparator (self):
self.comparator_test_helper (lexical_cmp, _expected_lexical_test_data)
def test_reverse_lexical_comparator (self):
rev = _expected_lexical_test_data[:]
rev.reverse ()
self.comparator_test_helper (make_reverse_comparator (lexical_cmp),
rev)
def test_lowercase_comparator (self):
self.comparator_test_helper (lowercase_cmp,
_expected_lowercase_test_data)
class AbstractBtreeKeyCompareTestCase (unittest.TestCase):
env = None
db = None
def setUp (self):
self.filename = self.__class__.__name__ + '.db'
self.homeDir = get_new_environment_path()
env = db.DBEnv()
env.open (self.homeDir,
db.DB_CREATE | db.DB_INIT_MPOOL
| db.DB_INIT_LOCK | db.DB_THREAD)
self.env = env
def tearDown (self):
self.closeDB()
if self.env is not None:
self.env.close()
self.env = None
test_support.rmtree(self.homeDir)
def addDataToDB (self, data):
i = 0
for item in data:
self.db.put (item, str (i))
i = i + 1
def createDB (self, key_comparator):
self.db = db.DB (self.env)
self.setupDB (key_comparator)
self.db.open (self.filename, "test", db.DB_BTREE, db.DB_CREATE)
def setupDB (self, key_comparator):
self.db.set_bt_compare (key_comparator)
def closeDB (self):
if self.db is not None:
self.db.close ()
self.db = None
def startTest (self):
pass
def finishTest (self, expected = None):
if expected is not None:
self.check_results (expected)
self.closeDB ()
def check_results (self, expected):
curs = self.db.cursor ()
try:
index = 0
rec = curs.first ()
while rec:
key, ignore = rec
self.failUnless (index < len (expected),
"to many values returned from cursor")
self.failUnless (expected[index] == key,
"expected value `%s' at %d but got `%s'"
% (expected[index], index, key))
index = index + 1
rec = next(curs)
self.failUnless (index == len (expected),
"not enough values returned from cursor")
finally:
curs.close ()
class BtreeKeyCompareTestCase (AbstractBtreeKeyCompareTestCase):
def runCompareTest (self, comparator, data):
self.startTest ()
self.createDB (comparator)
self.addDataToDB (data)
self.finishTest (data)
def test_lexical_ordering (self):
self.runCompareTest (lexical_cmp, _expected_lexical_test_data)
def test_reverse_lexical_ordering (self):
expected_rev_data = _expected_lexical_test_data[:]
expected_rev_data.reverse ()
self.runCompareTest (make_reverse_comparator (lexical_cmp),
expected_rev_data)
def test_compare_function_useless (self):
self.startTest ()
def socialist_comparator (l, r):
return 0
self.createDB (socialist_comparator)
self.addDataToDB (['b', 'a', 'd'])
# all things being equal the first key will be the only key
# in the database... (with the last key's value fwiw)
self.finishTest (['b'])
class BtreeExceptionsTestCase (AbstractBtreeKeyCompareTestCase):
def test_raises_non_callable (self):
self.startTest ()
self.assertRaises (TypeError, self.createDB, 'abc')
self.assertRaises (TypeError, self.createDB, None)
self.finishTest ()
def test_set_bt_compare_with_function (self):
self.startTest ()
self.createDB (lexical_cmp)
self.finishTest ()
def check_results (self, results):
pass
def test_compare_function_incorrect (self):
self.startTest ()
def bad_comparator (l, r):
return 1
# verify that set_bt_compare checks that comparator('', '') == 0
self.assertRaises (TypeError, self.createDB, bad_comparator)
self.finishTest ()
def verifyStderr(self, method, successRe):
"""
Call method() while capturing sys.stderr output internally and
call self.fail() if successRe.search() does not match the stderr
output. This is used to test for uncatchable exceptions.
"""
stdErr = sys.stderr
sys.stderr = StringIO()
try:
method()
finally:
temp = sys.stderr
sys.stderr = stdErr
errorOut = temp.getvalue()
if not successRe.search(errorOut):
self.fail("unexpected stderr output:\n"+errorOut)
def _test_compare_function_exception (self):
self.startTest ()
def bad_comparator (l, r):
if l == r:
# pass the set_bt_compare test
return 0
raise RuntimeError("i'm a naughty comparison function")
self.createDB (bad_comparator)
#print "\n*** test should print 2 uncatchable tracebacks ***"
self.addDataToDB (['a', 'b', 'c']) # this should raise, but...
self.finishTest ()
def test_compare_function_exception(self):
self.verifyStderr(
self._test_compare_function_exception,
re.compile('(^RuntimeError:.* naughty.*){2}', re.M|re.S)
)
def _test_compare_function_bad_return (self):
self.startTest ()
def bad_comparator (l, r):
if l == r:
# pass the set_bt_compare test
return 0
return l
self.createDB (bad_comparator)
#print "\n*** test should print 2 errors about returning an int ***"
self.addDataToDB (['a', 'b', 'c']) # this should raise, but...
self.finishTest ()
def test_compare_function_bad_return(self):
self.verifyStderr(
self._test_compare_function_bad_return,
re.compile('(^TypeError:.* return an int.*){2}', re.M|re.S)
)
def test_cannot_assign_twice (self):
def my_compare (a, b):
return 0
self.startTest ()
self.createDB (my_compare)
try:
self.db.set_bt_compare (my_compare)
self.assert_(0, "this set should fail")
except RuntimeError as msg:
pass
def test_suite ():
res = unittest.TestSuite ()
res.addTest (unittest.makeSuite (ComparatorTests))
res.addTest (unittest.makeSuite (BtreeExceptionsTestCase))
res.addTest (unittest.makeSuite (BtreeKeyCompareTestCase))
return res
if __name__ == '__main__':
unittest.main (defaultTest = 'suite')
Lib/bsddb/test/test_compat.py deleted 100644 → 0
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"""
Test cases adapted from the test_bsddb.py module in Python's
regression test suite.
"""
import os, string
import unittest
from .test_all import db, hashopen, btopen, rnopen, verbose, \
get_new_database_path
class CompatibilityTestCase(unittest.TestCase):
def setUp(self):
self.filename = get_new_database_path()
def tearDown(self):
try:
os.remove(self.filename)
except os.error:
pass
def test01_btopen(self):
self.do_bthash_test(btopen, 'btopen')
def test02_hashopen(self):
self.do_bthash_test(hashopen, 'hashopen')
def test03_rnopen(self):
data = "The quick brown fox jumped over the lazy dog.".split()
if verbose:
print("\nTesting: rnopen")
f = rnopen(self.filename, 'c')
for x in range(len(data)):
f[x+1] = data[x]
getTest = (f[1], f[2], f[3])
if verbose:
print('%s %s %s' % getTest)
self.assertEqual(getTest[1], 'quick', 'data mismatch!')
rv = f.set_location(3)
if rv != (3, 'brown'):
self.fail('recno database set_location failed: '+repr(rv))
f[25] = 'twenty-five'
f.close()
del f
f = rnopen(self.filename, 'w')
f[20] = 'twenty'
def noRec(f):
rec = f[15]
self.assertRaises(KeyError, noRec, f)
def badKey(f):
rec = f['a string']
self.assertRaises(TypeError, badKey, f)
del f[3]
rec = f.first()
while rec:
if verbose:
print(rec)
try:
rec = next(f)
except KeyError:
break
f.close()
def test04_n_flag(self):
f = hashopen(self.filename, 'n')
f.close()
def do_bthash_test(self, factory, what):
if verbose:
print('\nTesting: ', what)
f = factory(self.filename, 'c')
if verbose:
print('creation...')
# truth test
if f:
if verbose: print("truth test: true")
else:
if verbose: print("truth test: false")
f['0'] = ''
f['a'] = 'Guido'
f['b'] = 'van'
f['c'] = 'Rossum'
f['d'] = 'invented'
# 'e' intentionally left out
f['f'] = 'Python'
if verbose:
print('%s %s %s' % (f['a'], f['b'], f['c']))
if verbose:
print('key ordering...')
start = f.set_location(f.first()[0])
if start != ('0', ''):
self.fail("incorrect first() result: "+repr(start))
while 1:
try:
rec = next(f)
except KeyError:
self.assertEqual(rec, f.last(), 'Error, last <> last!')
f.previous()
break
if verbose:
print(rec)
self.assert_('f' in f, 'Error, missing key!')
# test that set_location() returns the next nearest key, value
# on btree databases and raises KeyError on others.
if factory == btopen:
e = f.set_location('e')
if e != ('f', 'Python'):
self.fail('wrong key,value returned: '+repr(e))
else:
try:
e = f.set_location('e')
except KeyError:
pass
else:
self.fail("set_location on non-existant key did not raise KeyError")
f.sync()
f.close()
# truth test
try:
if f:
if verbose: print("truth test: true")
else:
if verbose: print("truth test: false")
except db.DBError:
pass
else:
self.fail("Exception expected")
del f
if verbose:
print('modification...')
f = factory(self.filename, 'w')
f['d'] = 'discovered'
if verbose:
print('access...')
for key in list(f.keys()):
word = f[key]
if verbose:
print(word)
def noRec(f):
rec = f['no such key']
self.assertRaises(KeyError, noRec, f)
def badKey(f):
rec = f[15]
self.assertRaises(TypeError, badKey, f)
f.close()
#----------------------------------------------------------------------
def test_suite():
return unittest.makeSuite(CompatibilityTestCase)
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
Lib/bsddb/test/test_cursor_pget_bug.py deleted 100644 → 0
Dosyayı görüntüle @ dcc1e117
import unittest
import os, glob
from .test_all import db, test_support, get_new_environment_path, \
get_new_database_path
#----------------------------------------------------------------------
class pget_bugTestCase(unittest.TestCase):
"""Verify that cursor.pget works properly"""
db_name = 'test-cursor_pget.db'
def setUp(self):
self.homeDir = get_new_environment_path()
self.env = db.DBEnv()
self.env.open(self.homeDir, db.DB_CREATE | db.DB_INIT_MPOOL)
self.primary_db = db.DB(self.env)
self.primary_db.open(self.db_name, 'primary', db.DB_BTREE, db.DB_CREATE)
self.secondary_db = db.DB(self.env)
self.secondary_db.set_flags(db.DB_DUP)
self.secondary_db.open(self.db_name, 'secondary', db.DB_BTREE, db.DB_CREATE)
self.primary_db.associate(self.secondary_db, lambda key, data: data)
self.primary_db.put('salad', 'eggs')
self.primary_db.put('spam', 'ham')
self.primary_db.put('omelet', 'eggs')
def tearDown(self):
self.secondary_db.close()
self.primary_db.close()
self.env.close()
del self.secondary_db
del self.primary_db
del self.env
test_support.rmtree(self.homeDir)
def test_pget(self):
cursor = self.secondary_db.cursor()
self.assertEquals(('eggs', 'salad', 'eggs'), cursor.pget(key='eggs', flags=db.DB_SET))
self.assertEquals(('eggs', 'omelet', 'eggs'), cursor.pget(db.DB_NEXT_DUP))
self.assertEquals(None, cursor.pget(db.DB_NEXT_DUP))
self.assertEquals(('ham', 'spam', 'ham'), cursor.pget('ham', 'spam', flags=db.DB_SET))
self.assertEquals(None, cursor.pget(db.DB_NEXT_DUP))
cursor.close()
def test_suite():
return unittest.makeSuite(pget_bugTestCase)
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
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Misc/NEWS
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...@@ -73,6 +73,8 @@ C API ...@@ -73,6 +73,8 @@ C API
Library Library
------- -------
- The bsddb module has been removed.
- Issue #3719: platform.architecture() fails if there are spaces in the - Issue #3719: platform.architecture() fails if there are spaces in the
path to the Python binary. path to the Python binary.
......
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