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Problem
Actual upper bound of a random.Random.randbytes is 2**28 - 1
Following docs and exception message I would expect the limit of 2 ** 32 - 1 as for C 4-bytes integer
## -------------------- bytes methods --------------------- def randbytes(self, n): """Generate n random bytes.""" return self.getrandbits(n * 8).to_bytes(n, 'little') >>> bytes_string = random.randbytes(2 ** 28) Traceback (most recent call last): File "C:\Program Files\Python39\lib\code.py", line 90, in runcode exec(code, self.locals) File "<input>", line 1, in <module> File "C:\Program Files\Python39\lib\random.py", line 286, in randbytes return self.getrandbits(n * 8).to_bytes(n, 'little') OverflowError: Python int too large to convert to C int >>> bytes_string = random.randbytes(2 ** 28 - 1) >>> len(bytes_string) 268435455 Reproduced on
Python 3.9.4 (tags/v3.9.4:1f2e308, Apr 6 2021, 13:40:21) [MSC v.1928 64 bit (AMD64)] on win32
Python 3.11.2 (main, Jul 19 2024, 12:24:02) [GCC 12.2.0] on linux
Will you please point me - if there is a bug in docs/implementation, or this is my misunderstanding only.
Thank you in advance for you patience.
Linked PRs
- gh-133489: Document
random.randbytesbounds. #133529 - gh-133489: Remove size restrictions on getrandbits() and randbytes() #133658
- [3.14] gh-133489: Remove size restrictions on getrandbits() and randbytes() (GH-133658) #134964
- [3.13] gh-133489: Remove size restrictions on getrandbits() and randbytes() (GH-133658) #134965
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