ShareableList
- ShareableList(sequence=None, *, name=None)
Pattern for a mutable list-like object shareable via a shared memory block. It differs from the built-in list type in that these lists can not change their overall length (i.e. no append, insert, etc.) Because values are packed into a memoryview as bytes, the struct packing format for any storable value must require no more than 8 characters to describe its format.
© Python Software Foundation. PSF License Version 2 · Official docs ↗
Members of ShareableList
c
- count
- L.count(value) -> integer -- return number of occurrences of value.
f
- format
- The struct packing format used by all currently stored items.
i
- index
- Raises ValueError if the value is not present.
s
- shm
- The SharedMemory instance where the values are stored.
1 Example
>>> from multiprocessing import shared_memory >>> nul_bug_demo = shared_memory.ShareableList(['?\x00', b'\x03\x02\x01\x00\x00\x00']) >>> nul_bug_demo[0] '?' >>> nul_bug_demo[1] b'\x03\x02\x01' >>> nul_bug_demo.shm.unlink() >>> padded = shared_memory.ShareableList(['?\x00\x07', b'\x03\x02\x01\x00\x00\x00\x07']) >>> padded[0][:-1] '?\x00' >>> padded[1][:-1] b'\x03\x02\x01\x00\x00\x00' >>> padded.shm.unlink()
from the Python docs