【发布时间】:2022-01-13 11:11:54
【问题描述】:
我必须将一堆整数格式的 UUID 存储在一个 numpy 数组中。将 UUID 转换为整数格式(128 位)无效,因为可以存储在 numpy 数组中的最大整数大小为 64 位。因此,我尝试使用字段样式将 UUID 存储为 6 个单独的整数。
但是我无法从 numpy 数组值重新创建 UUID。这是问题的一个例子。
import uuid
#generate a random uuid4
my_uuid = uuid.uuid4()
my_uuid
# UUID('bf6cc180-52e1-42fe-b3fb-b47d238ed7ce')
# encode the uuid to 6 integers with fields
my_uuid_fields = my_uuid.fields
my_uuid_fields
# (3211575680, 21217, 17150, 179, 251, 198449560475598)
# recreate the uuid, this works
uuid.UUID(fields=my_uuid_fields)
# UUID('bf6cc180-52e1-42fe-b3fb-b47d238ed7ce')
# create an array with the fields
my_uuid_fields_arr = np.array(my_uuid_fields)
my_uuid_fields_arr
# array([3211575680,21217,17150,179,251,198449560475598])
# convert array back to tuple and check if its the same as the initial fields tuple
assert tuple(my_uuid_fields_arr) == my_uuid_fields
# this fails however
uuid.UUID(fields = tuple(my_uuid_fields_arr))
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/scratch/6084717/ipykernel_43199/1198120499.py in <module>
----> 1 uuid.UUID(fields = tuple(my_uuid_fields_arr))
/hpc/compgen/users/mpages/software/miniconda3/envs/babe/lib/python3.7/uuid.py in __init__(self, hex, bytes, bytes_le, fields, int, version, is_safe)
192 if int is not None:
193 if not 0 <= int < 1<<128:
--> 194 raise ValueError('int is out of range (need a 128-bit value)')
195 if version is not None:
196 if not 1 <= version <= 5:
ValueError: int is out of range (need a 128-bit value)
关于如何解决这个问题的任何想法?
【问题讨论】:
标签: python python-3.x numpy uuid