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118 lines
3.1 KiB
118 lines
3.1 KiB
import copy
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import random
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import string
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from typing import Any, Iterable, List, Tuple
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import redis
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from redis.typing import KeysT, KeyT
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def list_or_args(keys: KeysT, args: Tuple[KeyT, ...]) -> List[KeyT]:
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# returns a single new list combining keys and args
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try:
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iter(keys)
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# a string or bytes instance can be iterated, but indicates
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# keys wasn't passed as a list
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if isinstance(keys, (bytes, str)):
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keys = [keys]
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else:
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keys = list(keys)
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except TypeError:
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keys = [keys]
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if args:
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keys.extend(args)
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return keys
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def nativestr(x):
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"""Return the decoded binary string, or a string, depending on type."""
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r = x.decode("utf-8", "replace") if isinstance(x, bytes) else x
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if r == "null":
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return
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return r
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def delist(x):
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"""Given a list of binaries, return the stringified version."""
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if x is None:
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return x
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return [nativestr(obj) for obj in x]
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def parse_to_list(response):
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"""Optimistically parse the response to a list."""
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res = []
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special_values = {"infinity", "nan", "-infinity"}
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if response is None:
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return res
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for item in response:
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if item is None:
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res.append(None)
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continue
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try:
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item_str = nativestr(item)
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except TypeError:
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res.append(None)
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continue
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if isinstance(item_str, str) and item_str.lower() in special_values:
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res.append(item_str) # Keep as string
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else:
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try:
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res.append(int(item))
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except ValueError:
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try:
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res.append(float(item))
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except ValueError:
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res.append(item_str)
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return res
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def random_string(length=10):
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"""
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Returns a random N character long string.
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"""
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return "".join( # nosec
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random.choice(string.ascii_lowercase) for x in range(length)
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)
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def decode_dict_keys(obj):
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"""Decode the keys of the given dictionary with utf-8."""
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newobj = copy.copy(obj)
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for k in obj.keys():
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if isinstance(k, bytes):
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newobj[k.decode("utf-8")] = newobj[k]
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newobj.pop(k)
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return newobj
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def get_protocol_version(client):
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if isinstance(client, redis.Redis) or isinstance(client, redis.asyncio.Redis):
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return client.connection_pool.connection_kwargs.get("protocol")
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elif isinstance(client, redis.cluster.AbstractRedisCluster):
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return client.nodes_manager.connection_kwargs.get("protocol")
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def at_most_one_value_set(iterable: Iterable[Any]):
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"""
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Checks that at most one of the values in the iterable is truthy.
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Args:
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iterable: An iterable of values to check.
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Returns:
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True if at most one value is truthy, False otherwise.
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Raises:
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Might raise an error if the values in iterable are not boolean-compatible.
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For example if the type of the values implement
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__len__ or __bool__ methods and they raise an error.
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"""
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values = (bool(x) for x in iterable)
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return sum(values) <= 1
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