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usr
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lib
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python3
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dist-packages
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redis
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commands
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bf
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commands.py
from redis.client import NEVER_DECODE from redis.exceptions import ModuleError from redis.utils import HIREDIS_AVAILABLE BF_RESERVE = "BF.RESERVE" BF_ADD = "BF.ADD" BF_MADD = "BF.MADD" BF_INSERT = "BF.INSERT" BF_EXISTS = "BF.EXISTS" BF_MEXISTS = "BF.MEXISTS" BF_SCANDUMP = "BF.SCANDUMP" BF_LOADCHUNK = "BF.LOADCHUNK" BF_INFO = "BF.INFO" CF_RESERVE = "CF.RESERVE" CF_ADD = "CF.ADD" CF_ADDNX = "CF.ADDNX" CF_INSERT = "CF.INSERT" CF_INSERTNX = "CF.INSERTNX" CF_EXISTS = "CF.EXISTS" CF_MEXISTS = "CF.MEXISTS" CF_DEL = "CF.DEL" CF_COUNT = "CF.COUNT" CF_SCANDUMP = "CF.SCANDUMP" CF_LOADCHUNK = "CF.LOADCHUNK" CF_INFO = "CF.INFO" CMS_INITBYDIM = "CMS.INITBYDIM" CMS_INITBYPROB = "CMS.INITBYPROB" CMS_INCRBY = "CMS.INCRBY" CMS_QUERY = "CMS.QUERY" CMS_MERGE = "CMS.MERGE" CMS_INFO = "CMS.INFO" TOPK_RESERVE = "TOPK.RESERVE" TOPK_ADD = "TOPK.ADD" TOPK_INCRBY = "TOPK.INCRBY" TOPK_QUERY = "TOPK.QUERY" TOPK_COUNT = "TOPK.COUNT" TOPK_LIST = "TOPK.LIST" TOPK_INFO = "TOPK.INFO" TDIGEST_CREATE = "TDIGEST.CREATE" TDIGEST_RESET = "TDIGEST.RESET" TDIGEST_ADD = "TDIGEST.ADD" TDIGEST_MERGE = "TDIGEST.MERGE" TDIGEST_CDF = "TDIGEST.CDF" TDIGEST_QUANTILE = "TDIGEST.QUANTILE" TDIGEST_MIN = "TDIGEST.MIN" TDIGEST_MAX = "TDIGEST.MAX" TDIGEST_INFO = "TDIGEST.INFO" class BFCommands: """Bloom Filter commands.""" # region Bloom Filter Functions def create(self, key, errorRate, capacity, expansion=None, noScale=None): """ Create a new Bloom Filter `key` with desired probability of false positives `errorRate` expected entries to be inserted as `capacity`. Default expansion value is 2. By default, filter is auto-scaling. For more information see `BF.RESERVE <https://redis.io/commands/bf.reserve>`_. """ # noqa params = [key, errorRate, capacity] self.append_expansion(params, expansion) self.append_no_scale(params, noScale) return self.execute_command(BF_RESERVE, *params) def add(self, key, item): """ Add to a Bloom Filter `key` an `item`. For more information see `BF.ADD <https://redis.io/commands/bf.add>`_. """ # noqa return self.execute_command(BF_ADD, key, item) def madd(self, key, *items): """ Add to a Bloom Filter `key` multiple `items`. For more information see `BF.MADD <https://redis.io/commands/bf.madd>`_. """ # noqa return self.execute_command(BF_MADD, key, *items) def insert( self, key, items, capacity=None, error=None, noCreate=None, expansion=None, noScale=None, ): """ Add to a Bloom Filter `key` multiple `items`. If `nocreate` remain `None` and `key` does not exist, a new Bloom Filter `key` will be created with desired probability of false positives `errorRate` and expected entries to be inserted as `size`. For more information see `BF.INSERT <https://redis.io/commands/bf.insert>`_. """ # noqa params = [key] self.append_capacity(params, capacity) self.append_error(params, error) self.append_expansion(params, expansion) self.append_no_create(params, noCreate) self.append_no_scale(params, noScale) self.append_items(params, items) return self.execute_command(BF_INSERT, *params) def exists(self, key, item): """ Check whether an `item` exists in Bloom Filter `key`. For more information see `BF.EXISTS <https://redis.io/commands/bf.exists>`_. """ # noqa return self.execute_command(BF_EXISTS, key, item) def mexists(self, key, *items): """ Check whether `items` exist in Bloom Filter `key`. For more information see `BF.MEXISTS <https://redis.io/commands/bf.mexists>`_. """ # noqa return self.execute_command(BF_MEXISTS, key, *items) def scandump(self, key, iter): """ Begin an incremental save of the bloom filter `key`. This is useful for large bloom filters which cannot fit into the normal SAVE and RESTORE model. The first time this command is called, the value of `iter` should be 0. This command will return successive (iter, data) pairs until (0, NULL) to indicate completion. For more information see `BF.SCANDUMP <https://redis.io/commands/bf.scandump>`_. """ # noqa if HIREDIS_AVAILABLE: raise ModuleError("This command cannot be used when hiredis is available.") params = [key, iter] options = {} options[NEVER_DECODE] = [] return self.execute_command(BF_SCANDUMP, *params, **options) def loadchunk(self, key, iter, data): """ Restore a filter previously saved using SCANDUMP. See the SCANDUMP command for example usage. This command will overwrite any bloom filter stored under key. Ensure that the bloom filter will not be modified between invocations. For more information see `BF.LOADCHUNK <https://redis.io/commands/bf.loadchunk>`_. """ # noqa return self.execute_command(BF_LOADCHUNK, key, iter, data) def info(self, key): """ Return capacity, size, number of filters, number of items inserted, and expansion rate. For more information see `BF.INFO <https://redis.io/commands/bf.info>`_. """ # noqa return self.execute_command(BF_INFO, key) class CFCommands: """Cuckoo Filter commands.""" # region Cuckoo Filter Functions def create( self, key, capacity, expansion=None, bucket_size=None, max_iterations=None ): """ Create a new Cuckoo Filter `key` an initial `capacity` items. For more information see `CF.RESERVE <https://redis.io/commands/cf.reserve>`_. """ # noqa params = [key, capacity] self.append_expansion(params, expansion) self.append_bucket_size(params, bucket_size) self.append_max_iterations(params, max_iterations) return self.execute_command(CF_RESERVE, *params) def add(self, key, item): """ Add an `item` to a Cuckoo Filter `key`. For more information see `CF.ADD <https://redis.io/commands/cf.add>`_. """ # noqa return self.execute_command(CF_ADD, key, item) def addnx(self, key, item): """ Add an `item` to a Cuckoo Filter `key` only if item does not yet exist. Command might be slower that `add`. For more information see `CF.ADDNX <https://redis.io/commands/cf.addnx>`_. """ # noqa return self.execute_command(CF_ADDNX, key, item) def insert(self, key, items, capacity=None, nocreate=None): """ Add multiple `items` to a Cuckoo Filter `key`, allowing the filter to be created with a custom `capacity` if it does not yet exist. `items` must be provided as a list. For more information see `CF.INSERT <https://redis.io/commands/cf.insert>`_. """ # noqa params = [key] self.append_capacity(params, capacity) self.append_no_create(params, nocreate) self.append_items(params, items) return self.execute_command(CF_INSERT, *params) def insertnx(self, key, items, capacity=None, nocreate=None): """ Add multiple `items` to a Cuckoo Filter `key` only if they do not exist yet, allowing the filter to be created with a custom `capacity` if it does not yet exist. `items` must be provided as a list. For more information see `CF.INSERTNX <https://redis.io/commands/cf.insertnx>`_. """ # noqa params = [key] self.append_capacity(params, capacity) self.append_no_create(params, nocreate) self.append_items(params, items) return self.execute_command(CF_INSERTNX, *params) def exists(self, key, item): """ Check whether an `item` exists in Cuckoo Filter `key`. For more information see `CF.EXISTS <https://redis.io/commands/cf.exists>`_. """ # noqa return self.execute_command(CF_EXISTS, key, item) def mexists(self, key, *items): """ Check whether an `items` exist in Cuckoo Filter `key`. For more information see `CF.MEXISTS <https://redis.io/commands/cf.mexists>`_. """ # noqa return self.execute_command(CF_MEXISTS, key, *items) def delete(self, key, item): """ Delete `item` from `key`. For more information see `CF.DEL <https://redis.io/commands/cf.del>`_. """ # noqa return self.execute_command(CF_DEL, key, item) def count(self, key, item): """ Return the number of times an `item` may be in the `key`. For more information see `CF.COUNT <https://redis.io/commands/cf.count>`_. """ # noqa return self.execute_command(CF_COUNT, key, item) def scandump(self, key, iter): """ Begin an incremental save of the Cuckoo filter `key`. This is useful for large Cuckoo filters which cannot fit into the normal SAVE and RESTORE model. The first time this command is called, the value of `iter` should be 0. This command will return successive (iter, data) pairs until (0, NULL) to indicate completion. For more information see `CF.SCANDUMP <https://redis.io/commands/cf.scandump>`_. """ # noqa return self.execute_command(CF_SCANDUMP, key, iter) def loadchunk(self, key, iter, data): """ Restore a filter previously saved using SCANDUMP. See the SCANDUMP command for example usage. This command will overwrite any Cuckoo filter stored under key. Ensure that the Cuckoo filter will not be modified between invocations. For more information see `CF.LOADCHUNK <https://redis.io/commands/cf.loadchunk>`_. """ # noqa return self.execute_command(CF_LOADCHUNK, key, iter, data) def info(self, key): """ Return size, number of buckets, number of filter, number of items inserted, number of items deleted, bucket size, expansion rate, and max iteration. For more information see `CF.INFO <https://redis.io/commands/cf.info>`_. """ # noqa return self.execute_command(CF_INFO, key) class TOPKCommands: """TOP-k Filter commands.""" def reserve(self, key, k, width, depth, decay): """ Create a new Top-K Filter `key` with desired probability of false positives `errorRate` expected entries to be inserted as `size`. For more information see `TOPK.RESERVE <https://redis.io/commands/topk.reserve>`_. """ # noqa return self.execute_command(TOPK_RESERVE, key, k, width, depth, decay) def add(self, key, *items): """ Add one `item` or more to a Top-K Filter `key`. For more information see `TOPK.ADD <https://redis.io/commands/topk.add>`_. """ # noqa return self.execute_command(TOPK_ADD, key, *items) def incrby(self, key, items, increments): """ Add/increase `items` to a Top-K Sketch `key` by ''increments''. Both `items` and `increments` are lists. For more information see `TOPK.INCRBY <https://redis.io/commands/topk.incrby>`_. Example: >>> topkincrby('A', ['foo'], [1]) """ # noqa params = [key] self.append_items_and_increments(params, items, increments) return self.execute_command(TOPK_INCRBY, *params) def query(self, key, *items): """ Check whether one `item` or more is a Top-K item at `key`. For more information see `TOPK.QUERY <https://redis.io/commands/topk.query>`_. """ # noqa return self.execute_command(TOPK_QUERY, key, *items) def count(self, key, *items): """ Return count for one `item` or more from `key`. For more information see `TOPK.COUNT <https://redis.io/commands/topk.count>`_. """ # noqa return self.execute_command(TOPK_COUNT, key, *items) def list(self, key, withcount=False): """ Return full list of items in Top-K list of `key`. If `withcount` set to True, return full list of items with probabilistic count in Top-K list of `key`. For more information see `TOPK.LIST <https://redis.io/commands/topk.list>`_. """ # noqa params = [key] if withcount: params.append("WITHCOUNT") return self.execute_command(TOPK_LIST, *params) def info(self, key): """ Return k, width, depth and decay values of `key`. For more information see `TOPK.INFO <https://redis.io/commands/topk.info>`_. """ # noqa return self.execute_command(TOPK_INFO, key) class TDigestCommands: def create(self, key, compression): """ Allocate the memory and initialize the t-digest. For more information see `TDIGEST.CREATE <https://redis.io/commands/tdigest.create>`_. """ # noqa return self.execute_command(TDIGEST_CREATE, key, compression) def reset(self, key): """ Reset the sketch `key` to zero - empty out the sketch and re-initialize it. For more information see `TDIGEST.RESET <https://redis.io/commands/tdigest.reset>`_. """ # noqa return self.execute_command(TDIGEST_RESET, key) def add(self, key, values, weights): """ Add one or more samples (value with weight) to a sketch `key`. Both `values` and `weights` are lists. For more information see `TDIGEST.ADD <https://redis.io/commands/tdigest.add>`_. Example: >>> tdigestadd('A', [1500.0], [1.0]) """ # noqa params = [key] self.append_values_and_weights(params, values, weights) return self.execute_command(TDIGEST_ADD, *params) def merge(self, toKey, fromKey): """ Merge all of the values from 'fromKey' to 'toKey' sketch. For more information see `TDIGEST.MERGE <https://redis.io/commands/tdigest.merge>`_. """ # noqa return self.execute_command(TDIGEST_MERGE, toKey, fromKey) def min(self, key): """ Return minimum value from the sketch `key`. Will return DBL_MAX if the sketch is empty. For more information see `TDIGEST.MIN <https://redis.io/commands/tdigest.min>`_. """ # noqa return self.execute_command(TDIGEST_MIN, key) def max(self, key): """ Return maximum value from the sketch `key`. Will return DBL_MIN if the sketch is empty. For more information see `TDIGEST.MAX <https://redis.io/commands/tdigest.max>`_. """ # noqa return self.execute_command(TDIGEST_MAX, key) def quantile(self, key, quantile): """ Return double value estimate of the cutoff such that a specified fraction of the data added to this TDigest would be less than or equal to the cutoff. For more information see `TDIGEST.QUANTILE <https://redis.io/commands/tdigest.quantile>`_. """ # noqa return self.execute_command(TDIGEST_QUANTILE, key, quantile) def cdf(self, key, value): """ Return double fraction of all points added which are <= value. For more information see `TDIGEST.CDF <https://redis.io/commands/tdigest.cdf>`_. """ # noqa return self.execute_command(TDIGEST_CDF, key, value) def info(self, key): """ Return Compression, Capacity, Merged Nodes, Unmerged Nodes, Merged Weight, Unmerged Weight and Total Compressions. For more information see `TDIGEST.INFO <https://redis.io/commands/tdigest.info>`_. """ # noqa return self.execute_command(TDIGEST_INFO, key) class CMSCommands: """Count-Min Sketch Commands""" # region Count-Min Sketch Functions def initbydim(self, key, width, depth): """ Initialize a Count-Min Sketch `key` to dimensions (`width`, `depth`) specified by user. For more information see `CMS.INITBYDIM <https://redis.io/commands/cms.initbydim>`_. """ # noqa return self.execute_command(CMS_INITBYDIM, key, width, depth) def initbyprob(self, key, error, probability): """ Initialize a Count-Min Sketch `key` to characteristics (`error`, `probability`) specified by user. For more information see `CMS.INITBYPROB <https://redis.io/commands/cms.initbyprob>`_. """ # noqa return self.execute_command(CMS_INITBYPROB, key, error, probability) def incrby(self, key, items, increments): """ Add/increase `items` to a Count-Min Sketch `key` by ''increments''. Both `items` and `increments` are lists. For more information see `CMS.INCRBY <https://redis.io/commands/cms.incrby>`_. Example: >>> cmsincrby('A', ['foo'], [1]) """ # noqa params = [key] self.append_items_and_increments(params, items, increments) return self.execute_command(CMS_INCRBY, *params) def query(self, key, *items): """ Return count for an `item` from `key`. Multiple items can be queried with one call. For more information see `CMS.QUERY <https://redis.io/commands/cms.query>`_. """ # noqa return self.execute_command(CMS_QUERY, key, *items) def merge(self, destKey, numKeys, srcKeys, weights=[]): """ Merge `numKeys` of sketches into `destKey`. Sketches specified in `srcKeys`. All sketches must have identical width and depth. `Weights` can be used to multiply certain sketches. Default weight is 1. Both `srcKeys` and `weights` are lists. For more information see `CMS.MERGE <https://redis.io/commands/cms.merge>`_. """ # noqa params = [destKey, numKeys] params += srcKeys self.append_weights(params, weights) return self.execute_command(CMS_MERGE, *params) def info(self, key): """ Return width, depth and total count of the sketch. For more information see `CMS.INFO <https://redis.io/commands/cms.info>`_. """ # noqa return self.execute_command(CMS_INFO, key)
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