def test_when_file_does_not_exist(self):
path = os.path.join(self.tempdir, 'foo.db')
db = semidbm.open(path, 'n')
db['foo'] = 'bar'
self.assertEqual(db['foo'], b'bar')
db.close()
# Opening the file again should basically blank out
# any existing database.
db = semidbm.open(path, 'n')
self.assertEqual(list(db.keys()), [])
db.close()
def test_checksum_failure(self):
db = semidbm.open(self.dbdir, 'c')
db['key'] = 'value'
db.close()
# Change the first digit of the checksum data.
data_file = self.open_data_file(mode='r')
# 3:key15:<checksum>value
# First checksum digit is 9 bytes into the file.
beginning = data_file.read()
new_digit = int(beginning[8]) + 1
data_file.close()
data_file = self.open_data_file(mode='w')
data_file.write(beginning[:8])
data_file.write(str(new_digit))
data_file.write(beginning[9:])
data_file.close()
db = self.open_db_file(verify_checksums=True)
with self.assertRaises(semidbm.DBMChecksumError):
db['key']
# If checksums are not enabled, an exception is not raised.
db = self.open_db_file(verify_checksums=False)
try:
db['key']
except semidbm.DBMChecksumError:
self.fail("Checksums were suppose to be disabled.")
def __init__(self, csm):
self.csm = csm
# This uses dbm, so we open the DB file:
filename = simbase.config.GetString('account-bridge-filename',
'account-bridge')
self.dbm = semidbm.open(filename, 'c')
def test_load_empty_db(self):
db = semidbm.open(self.dbdir, 'c')
db.close()
empty_db = self.open_db_file()
keys = empty_db.keys()
empty_db.close()
self.assertEqual(keys, [])
def test_key_does_not_exist(self):
db = semidbm.open(self.dbdir, 'c')
db['foo'] = 'bar'
db.close()
read_only = self.open_db_file()
self.assertRaises(KeyError, read_only.__getitem__, 'bar')
read_only.close()
def test_when_files_exist(self):
db = self.open_db_file()
db['foo'] = 'bar'
db.close()
db_write_mode = semidbm.open(self.dbdir, 'w')
self.assertEqual(db_write_mode['foo'], b'bar')
db_write_mode.close()
def test_open_read_multiple_times(self):
db = semidbm.open(self.dbdir, 'c')
db['foo'] = 'bar'
db.close()
# Open then close db immediately.
db2 = self.open_db_file()
db2.close()
read_only = self.open_db_file()
self.assertEqual(read_only['foo'], b'bar')
read_only.close()
def test_open_read_multiple_times(self):
db = semidbm.open(self.dbdir, 'c')
db['foo'] = 'bar'
db.close()
# Open then close db immediately.
db2 = self.open_db_file()
db2.close()
read_only = self.open_db_file()
self.assertEqual(read_only['foo'], b'bar')
read_only.close()
def create(self):
"""Create a new on-disk database.
@raise anydbm.error: If there's a problem creating the database.
"""
if self.filename:
self.db = anydbm.open(self.filename, "n") #raises anydbm.error
self.db["--Reserved--type"] = self.type
self.db.sync()
else:
self.db = {}
def test_can_read_items(self):
db = semidbm.open(self.dbdir, 'c')
db['foo'] = 'bar'
db['bar'] = 'baz'
db['baz'] = 'foo'
db.close()
read_only = self.open_db_file()
self.assertEqual(read_only[b'foo'], b'bar')
self.assertEqual(read_only[b'bar'], b'baz')
self.assertEqual(read_only[b'baz'], b'foo')
read_only.close()
def test_can_read_items(self):
db = semidbm.open(self.dbdir, 'c')
db['foo'] = 'bar'
db['bar'] = 'baz'
db['baz'] = 'foo'
db.close()
read_only = self.open_db_file()
self.assertEqual(read_only[b'foo'], b'bar')
self.assertEqual(read_only[b'bar'], b'baz')
self.assertEqual(read_only[b'baz'], b'foo')
read_only.close()
def __init__(self, dbdir, check_frequency=20, max_filesize=MAX_DISK_USAGE):
import semidbm
self._db = semidbm.open(dbdir, 'c')
self._max_filesize = max_filesize
# How frequently we check the file size of the cache.
# If we check every 20 writes, then at worst case we overshoot
# the max size by MAX_BODY_SIZE * check_frequency, or
# about 20MB if we use the default values for everything.
self._check_frequency = check_frequency
self._counter = 0
# When we reach the max disk size, we disable
# writing data to the cache.
self._writes_enabled = True
def open(self):
"""Open a pre-existing on-disk database.
@raise anydbm.error: If there's a problem opening the database.
@raise ValueError: If the database is not of the right type.
"""
if not self.filename:
raise ValueError("Can only open on-disk databases")
self.db = anydbm.open(self.filename, "w") #raises anydbm.error
try:
if self.db["--Reserved--type"] != self.type:
raise ValueError("Not a %s database" % self.type)
except KeyError:
raise ValueError("Not a recognized database")
def test_checksum_failure(self):
db = semidbm.open(self.dbdir, 'c')
db[b'key'] = b'value'
db.close()
data_file = self.open_data_file(mode='rb')
contents = data_file.read()
data_file.close()
# Changing 'value' to 'Value' should cause a checksum failure.
contents = contents.replace(b'value', b'Value')
data_file = self.open_data_file(mode='wb')
data_file.write(contents)
data_file.close()
db = self.open_db_file(verify_checksums=True)
with self.assertRaises(semidbm.DBMChecksumError):
db['key']
db.close()
# If checksums are not enabled, an exception is not raised.
db = self.open_db_file(verify_checksums=False)
try:
db['key']
except semidbm.DBMChecksumError:
self.fail("Checksums were suppose to be disabled.")
finally:
db.close()
def test_checksum_failure(self):
db = semidbm.open(self.dbdir, 'c')
db[b'key'] = b'value'
db.close()
data_file = self.open_data_file(mode='rb')
contents = data_file.read()
data_file.close()
# Changing 'value' to 'Value' should cause a checksum failure.
contents = contents.replace(b'value', b'Value')
data_file = self.open_data_file(mode='wb')
data_file.write(contents)
data_file.close()
db = self.open_db_file(verify_checksums=True)
with self.assertRaises(semidbm.DBMChecksumError):
db['key']
db.close()
# If checksums are not enabled, an exception is not raised.
db = self.open_db_file(verify_checksums=False)
try:
db['key']
except semidbm.DBMChecksumError:
self.fail("Checksums were suppose to be disabled.")
finally:
db.close()
def __init__(self):
if self._kanwadict is None:
dictpath = resource_filename(__name__, 'kanwadict3.db') # FIXME: no hardcoded filename
self._kanwadict = dbm.open(dictpath, 'r')
def open_db_file(self, **kwargs):
# If they do not explicitly set verify_checksums
# to something, default to it being on.
if 'verify_checksums' not in kwargs:
kwargs['verify_checksums'] = True
return semidbm.open(self.dbdir, 'c', **kwargs)
def reader(self):
self.close()
self._file = dbm.open(self._path, 'r')
return self
def writer(self):
"""Return a new writer. Will always create a new file"""
self.close()
self._file = dbm.open(self._path, 'n')
return self
def __init__(self, name):
super(Database, self).__init__()
self.db = semidbm.open(os.path.join(directory(), name), 'c')
def open_db_file(self, **kwargs):
return semidbm.open(self.dbdir, 'r', **kwargs)
def reader(self):
self.close()
self._file = dbm.open(self._path, 'r')
return self
def appender(self):
"""Return a new writer, preserving the file if it already exists"""
self.close()
self._file = dbm.open(self._path, 'c')
return self
def open_db_file(self, **kwargs):
return semidbm.open(self.dbdir, 'r', **kwargs)
def __init__(self, dbm_file):
self._dbm = semidbm.open(dbm_file, 'r')
def __init__(self, dbm_file): self._dbm = semidbm.open(dbm_file, 'r')
def open(self):
self._subcat_index = semidbm.open(self._subcat_index_file, 'c')
self._supercat_index = semidbm.open(self._supercat_index_file, 'c')
return self
def test_unicode_chars(self):
db = semidbm.open(self.dbdir, 'c')
# cafe with the e-accute.
db[b'caf\xc3\xa9'] = b'caf\xc3\xa9'
self.assertEqual(db[b'caf\xc3\xa9'], b'caf\xc3\xa9')
db.close()
def __init__(self):
if self._kanwadict is None:
dictpath = resource_filename(
__name__, 'kanwadict3.db') # FIXME: no hardcoded filename
self._kanwadict = dbm.open(dictpath, 'r')
def open_db_file(self, **kwargs):
# If they do not explicitly set verify_checksums
# to something, default to it being on.
if 'verify_checksums' not in kwargs:
kwargs['verify_checksums'] = True
return semidbm.open(self.dbdir, 'c', **kwargs)
def appender(self):
"""Return a new writer, preserving the file if it already exists"""
self.close()
self._file = dbm.open(self._path, 'c')
return self
def shelve_open_semidbm(filename,
flag='c',
protocol=None,
writeback=False):
import semidbm # pylint: disable=import-error
return shelve.Shelf(semidbm.open(filename, flag), protocol, writeback)
def writer(self):
"""Return a new writer. Will always create a new file"""
self.close()
self._file = dbm.open(self._path, 'n')
return self
# This file is the starting file for a rhyming program using NLTK.
import semidbm
import random
import time
from nltk.tokenize import RegexpTokenizer
# Open the rhyming database
syllablesDB = semidbm.open('words.db')
rhymesDB = semidbm.open('rhymes.db')
def rhyme(word, count):
"""Returns a list of all the words that rhyme with 'word' with 'count' number of syllables."""
# start = time.time() #####
try:
wordSyllables = syllablesDB[word.upper()].decode().split()[0]
# print wordSyllables ###
wordRhymes = [word.decode() for word in rhymesDB[wordSyllables].split()]
wordRhymes.remove(word.upper())
# print wordRhymes ###
backlist = [x.lower() for x in wordRhymes if count == 0 or syllablesDB[x].split()[1] == count]
except:
backlist = []
# print 'rhyme: '+str(time.time() - start) #####
return backlist
def rhymesWith(word1, word2):
"""Determines if two words rhyme."""
def test_unicode_chars(self):
db = semidbm.open(self.dbdir, 'c')
# cafe with the e-accute.
db[b'caf\xc3\xa9'] = b'caf\xc3\xa9'
self.assertEqual(db[b'caf\xc3\xa9'], b'caf\xc3\xa9')
db.close()
def __init__(self, filename, flag='c', protocol=pickle.HIGHEST_PROTOCOL):
self._my_file = semidbm.open(filename, flag=flag)
self._protocol = protocol
def __init__(self, db=None):
if isinstance(db, str):
self.db = semidbm.open(db, 'c')
else:
self.db = db
def __init__(self, conf=None):
if conf is None:
raise Exception('Path required.')
if not os.path.exists(os.path.dirname(conf)):
os.makedirs(os.path.dirname(conf))
self._db = semidbm.open(conf, 'c')
categories = collections.defaultdict(list)
review_dict = {}
terms_to_collect = set()
businesses_to_collect = set()
with open('Business.json') as f:
businesses = {b['business_id'].encode('utf-8'): (b['name'].encode('utf-8'), [cat.encode('utf-8') for cat in b['categories'] if cat != 'Restaurants'], b['stars']) for b in json.load(f)}
with open(city + '.json') as reviews:
reviews_list = json.load(reviews)
for review in reviews_list:
review_dict[review['review_id'].encode('utf-8')] = (review['text'].encode('utf-8'), review['business_id'].encode('utf-8'), review['stars'], review['date'].encode('utf-8'))
terms = tokenize_regex.findall(review['text'].lower())
if terms:
review_weight = 1.0/len(terms)
for term in terms:
categories[term.encode('utf-8')].append((review['review_id'].encode('utf-8'), review_weight))
terms_to_collect.add(term.encode('utf-8'))
businesses_to_collect.add(review['business_id'].encode('utf-8'))
s = shelve.Shelf(semidbm.open(city + '-Baseline.db', flag='n'), protocol=pickle.HIGHEST_PROTOCOL)
for k,v in categories.items():
s["c=" + k] = v
for k, v in review_dict.items():
s["r=" + k] = v
for b in businesses_to_collect:
s["b=" + b] = businesses[b]
for t in terms_to_collect:
s["t=" + t] = [(t,1.0)]
s.close()
def __init__(self, csm):
self.csm = csm
filename = simbase.config.GetString(
'account-bridge-filename', 'account-bridge')
self.dbm = semidbm.open(filename, 'c')
def __init__(self, filename, flag='c', protocol=None, writeback=False):
import semidbm
shelve.Shelf.__init__(self, semidbm.open(filename, flag), protocol,
writeback)
def __init__(self, name):
super(Database, self).__init__()
try:
self.db = semidbm.open(os.path.join(directory(), name), 'c')
except NotADirectoryError:
logger.error("Old database type encountered!")
def shelve_open_semidbm(filename,
flag='c',
protocol=None,
writeback=False):
import semidbm
return shelve.Shelf(semidbm.open(filename, flag), protocol, writeback)
def __enter__(self):
self._cache = semidbm.open(self._cache_dir, flag='c')
return self._cache
def open(self):
self.db = semidbm.open(self.path, 'c')
def open_db_file(self):
return semidbm.open(os.path.join(self.tempdir,
'myfile.db'), 'c')
def kanwaout(self, out):
dic = dbm.open(out, 'c')
for (k, v) in self.records.items():
dic[k] = compress(dumps(v))
dic.close()
def __init__(self, city):
self.city = city
self.f = semidbm.open(city + '.db', flag='r')
self.db = shelve.Shelf(self.f, protocol=pickle.HIGHEST_PROTOCOL)
def kanwaout(self, out):
dic = dbm.open(out, 'c')
for (k, v) in self.records.items():
dic[k] = compress(dumps(v))
dic.close()
def run_bench(N, db_tpl) -> Dict[str, Dict[str, float]]:
batchsize = 1000
LMDBM_FILE = db_tpl.format("lmdbm")
LMDBM_BATCH_FILE = db_tpl.format("lmdbm-batch")
PYSOS_FILE = db_tpl.format("pysos")
SQLITEDICT_FILE = db_tpl.format("sqlitedict")
SQLITEDICT_BATCH_FILE = db_tpl.format("sqlitedict-batch")
DBM_DUMB_FILE = db_tpl.format("dbm.dumb")
DBM_GNU_FILE = db_tpl.format("dbm.gnu")
SEMIDBM_FILE = db_tpl.format("semidbm")
VEDIS_FILE = db_tpl.format("vedis")
VEDIS_BATCH_FILE = db_tpl.format("vedis-batch")
UNQLITE_FILE = db_tpl.format("unqlite")
UNQLITE_BATCH_FILE = db_tpl.format("unqlite-batch")
remove_lmdbm(LMDBM_FILE)
remove_lmdbm(LMDBM_BATCH_FILE)
with suppress(FileNotFoundError):
os.unlink(PYSOS_FILE)
with suppress(FileNotFoundError):
os.unlink(SQLITEDICT_FILE)
with suppress(FileNotFoundError):
os.unlink(SQLITEDICT_BATCH_FILE)
remove_dbm(DBM_DUMB_FILE)
remove_semidbm(SEMIDBM_FILE)
with suppress(FileNotFoundError):
os.unlink(VEDIS_FILE)
with suppress(FileNotFoundError):
os.unlink(VEDIS_BATCH_FILE)
with suppress(FileNotFoundError):
os.unlink(UNQLITE_FILE)
with suppress(FileNotFoundError):
os.unlink(UNQLITE_BATCH_FILE)
ret: DefaultDict[str, Dict[str, float]] = defaultdict(dict)
# writes
with MeasureTime() as t:
with JsonLmdb.open(LMDBM_FILE, "c") as db:
for k, v in data(N):
db[k] = v
ret["lmdbm"]["write"] = t.get()
print("lmdbm write", N, t.get())
with MeasureTime() as t:
with JsonLmdb.open(LMDBM_BATCH_FILE, "c") as db:
for pairs in batch(data(N), batchsize):
db.update(pairs)
ret["lmdbm-batch"]["write"] = t.get()
print("lmdbm-batch write", N, t.get())
with open(os.devnull, "w") as devnull: # mute annoying "free lines" output
with redirect_stdout(devnull):
with MeasureTime() as t:
db = pysos.Dict(PYSOS_FILE)
for k, v in data(N):
db[k] = v
db.close()
ret["pysos"]["write"] = t.get()
print("pysos write", N, t.get())
with MeasureTime() as t:
with SqliteDict(SQLITEDICT_FILE, autocommit=True) as db:
for k, v in data(N):
db[k] = v
ret["sqlitedict"]["write"] = t.get()
print("sqlitedict write", N, t.get())
with MeasureTime() as t:
with SqliteDict(SQLITEDICT_BATCH_FILE, autocommit=False) as db:
for pairs in batch(data(N), batchsize):
db.update(pairs)
db.commit()
ret["sqlitedict-batch"]["write"] = t.get()
print("sqlitedict-batch write", N, t.get())
with MeasureTime() as t:
with dbm.dumb.open(DBM_DUMB_FILE, "c") as db:
for k, v in data(N):
db[k] = json.dumps(v)
ret["dbm.dumb"]["write"] = t.get()
print("dbm.dumb write", N, t.get())
if gdbm:
with MeasureTime() as t:
with dbm.gnu.open(DBM_GNU_FILE, "c") as db:
for k, v in data(N):
db[k] = json.dumps(v)
ret["dbm.gnu"]["write"] = t.get()
print("dbm.gnu write", N, t.get())
with MeasureTime() as t:
db = semidbm.open(SEMIDBM_FILE, "c")
for k, v in data(N):
db[k] = json.dumps(v)
db.close()
ret["semidbm"]["write"] = t.get()
print("semidbm write", N, t.get())
with MeasureTime() as t:
with Vedis(VEDIS_FILE) as db:
for k, v in data(N):
db[k] = json.dumps(v)
ret["vedis"]["write"] = t.get()
print("vedis write", N, t.get())
with MeasureTime() as t:
with Vedis(VEDIS_BATCH_FILE) as db:
for pairs in batch(data(N), batchsize):
db.update({k: json.dumps(v) for k, v in pairs})
ret["vedis-batch"]["write"] = t.get()
print("vedis-batch write", N, t.get())
with MeasureTime() as t:
with UnQLite(UNQLITE_FILE) as db:
for k, v in data(N):
db[k] = json.dumps(v)
ret["unqlite"]["write"] = t.get()
print("unqlite write", N, t.get())
with MeasureTime() as t:
with UnQLite(UNQLITE_BATCH_FILE) as db:
for pairs in batch(data(N), batchsize):
db.update({k: json.dumps(v) for k, v in pairs})
ret["unqlite-batch"]["write"] = t.get()
print("unqlite-batch write", N, t.get())
# reads
with MeasureTime() as t:
with JsonLmdb.open(LMDBM_FILE, "r") as db:
for k in allkeys(N):
db[k]
# ret["lmdbm"]["read"] = t.get()
print("lmdbm cont read", N, t.get())
with MeasureTime() as t:
with JsonLmdb.open(LMDBM_FILE, "r") as db:
for k in randkeys(N, N):
db[k]
ret["lmdbm"]["read"] = t.get()
print("lmdbm rand read", N, t.get())
with open(os.devnull, "w") as devnull: # mute annoying "free lines" output
with redirect_stdout(devnull):
with MeasureTime() as t:
db = pysos.Dict(PYSOS_FILE)
for k in randkeys(N, N):
db[k]
db.close()
ret["pysos"]["read"] = t.get()
print("pysos read", N, t.get())
with MeasureTime() as t:
with SqliteDict(SQLITEDICT_FILE) as db:
for k in randkeys(N, N):
db[k]
ret["sqlitedict"]["read"] = t.get()
print("sqlitedict read", N, t.get())
with MeasureTime() as t:
with dbm.dumb.open(DBM_DUMB_FILE, "r") as db:
for k in randkeys(N, N):
json.loads(db[k])
ret["dbm.dumb"]["read"] = t.get()
print("dbm.dumb read", N, t.get())
if gdbm:
with MeasureTime() as t:
with dbm.gnu.open(DBM_GNU_FILE, "r") as db:
for k in randkeys(N, N):
json.loads(db[k])
ret["dbm.gnu"]["read"] = t.get()
print("dbm.gnu read", N, t.get())
with MeasureTime() as t:
db = semidbm.open(SEMIDBM_FILE, "r")
for k in randkeys(N, N):
json.loads(db[k])
db.close()
ret["semidbm"]["read"] = t.get()
print("semidbm read", N, t.get())
with MeasureTime() as t:
with Vedis(VEDIS_FILE) as db:
for k in randkeys(N, N):
json.loads(db[k])
ret["vedis"]["read"] = t.get()
print("vedis read", N, t.get())
with MeasureTime() as t:
with UnQLite(UNQLITE_FILE) as db:
for k in randkeys(N, N):
json.loads(db[k])
ret["unqlite"]["read"] = t.get()
print("unqlite read", N, t.get())
return ret
def __init__(self, csm):
self.csm = csm
filename = simbase.config.GetString(
'account-bridge-filename', 'account-bridge')
self.dbm = semidbm.open(filename, 'c')
import re
import pickle
import shelve
import semidbm
import pandas
from os.path import basename
from collections import defaultdict
from operator import itemgetter
from math import sqrt
NUM_TOPICS = 40
tokenize_regex = re.compile(r'[A-Za-z]+')
s = shelve.Shelf(semidbm.open(city + '.db', flag='n'),
protocol=pickle.HIGHEST_PROTOCOL)
for b in pandas.read_json('Business.json').itertuples():
s["b=" + str(b.business_id)] = (b.name, [
cat for cat in b.categories if cat != 'Restaurants'
], b.stars)
reviews_body = pandas.read_json('Urbana.json')
reviews_by_term = defaultdict(list)
term_frequencies = defaultdict(int)
for r in reviews_body.itertuples():
for term in tokenize_regex.findall(r.text):
reviews_by_term[term].append((r.review_id, 1))
term_frequencies[term] += 1